Coin jam in flight deck ошибка

Рубрика: Игровые автоматы

Ошибки, неисправности, ремонт игровых автоматов Novomatic, Gaminator

Novomatic ROM crc error

• Neispravnosti Chast1_rus Неисправности по автоматам: Атроник / Atronic, Вильямс / WMS 550, WMS Blue Bird, Bally Evolution, Bally Game Maker (АИТ-2), Новоматик / Novomatic, Юнидеза / Unidesa, Аристократ / Aristocrat. / pdf, размер: 241.32 kB/

• Neispravnosti Chast2_rus Неисправности автоматов Novomatic, Atronic, Gamemaker, Bally, Aristocrat. Неисправности и ремонт купюроприемников JCM WBA, JCM EB-200, Cash Code, GPT. / pdf, размер: 1.13 MB/

• Neispravnosti Chast3_rus Неисправности по автоматам: Атроник / Atronic, Конами / Konami, Новоматик / Novomatic, Юнидеза / Unidesa, Bally Evo, Вильямс / WMS 550, WMS Blue Bird, PlayStar, Аристократ / Aristocrat. / pdf, размер: 173.47 kB/

• Практические советы по ремонту бытовой радиоэлектронной аппаратуры. Столовых А.М. 2002. Книга предназначена для широкого круга читателей, профессионально занимающихся ремонтом бытовой электронной техники, она может быть полезна тем, кто хочет сам освоить ремонт аппаратуры, находящейся в домашнем пользовании, но не имеет достаточного опыта в этом деле. Автор делится своими секретами ремонта и маленькими хитростями, применяемыми многими мастерами в ремонтной практике. / djvu, размер: 3.03 MB/

• Шпионские штучки и устройства для защиты объектов и информации. Золотарев С. А. 1996. В книге приводятся схемы устройств для защиты информации, описаны принципы действия, даны рекомендации по изготовлению и настройке.
Книга предназначена для подготовленных радиолюбителей , желающих применить свои знания в области защиты информации и объектов. / pdf, размер: 931.38 kB/

• 500 Схем Для Радиолюбителей. Источники питания. Семьян А.П. 2005. В даной книге представлены схемные решения ИСТОЧНИКОВ ПИТАНИЯ.Схемы не повторяют друг друга,содержат определённые элементы оригинальности,распологаются в очерёдности»от простого к сложному». / djvu, размер: 2.73 MB/

• Блоки питания для системных модулей типа IBM PC-XT/AT. Головков А.В., Любицкий В.Б. 1995. В книге приведены схемы блоков питания для системных модулей IBM PC-XT/AT предназначенных для преобразования входного переменного напряжения сети в выходные постоянные напряжения, обеспечивающих работу всех узлов и блоков компьютера, а также особенности их ремонта. / djvu, размер: 878.98 kB/

• Импульсные источники питания. Раймонд Мэк. 2008. Книга охватывает все основные схемы импульсных источников питания, включая обратноходовые и прямоходовые преобразователи, мостовые, понижающие, повышающие и комбинированные схемы. / djvu, размер: 1.83 MB/

• Источники питания. Инверторы. Конверторы. Линейные и импульсные стабилизаторы. И.М.Готтлиб. 2002. Практическое руководство для подготовленного читателя при создании или эксплуатации различных вариантов источников питания. Подробно рассмотрено применение новейших полупроводниковых силовых приборов. Рассмотрены и простейшие источники питания, и логически сложные современные системы. Последние оказываются простыми в реализации при использовании перспективных интегральных схем. / djvu, размер: 9.63 MB/

• Источники питания ПК и периферии. Кучеров Д.П. 2002. В книге рассмотрены источник электропитания персональных компьютеров, мониторов. Также приведен большой обзор схем устройств, повышающих качество электрической энергии: сетевых фильтров и источников бесперебойного питания. / djvu, размер: 11.15 MB/

• Источники питания мониторов. Кучеров Д.П. 2001. Первая в СНГ книга, посвященная источникам питания мониторов. В ней подробно рассмотрены электрические принципиальные схемы блоков питания широкой номенклатуры мониторов персональных компьютеров (Acer, Panasonic, Samsung, LG, Daewoo и других). Освещены особенности работы основных функциональных устройств источников питания, таких как корректор мощности, преобразователь, элементы защиты. Приведены необходимые сведения о ремонте и регулировке описанных источников питания. Некоторые электрические принципиальные схемы мониторов, приведенные в книге, могут иметь ряд отличий от схем, используемых в реальных изделиях. Это можно объяснить изменениями, постоянно вводимыми производителем в схему мониторов с целью улучшения параметров и повышения надежности. Пособие предназначено для широкого круга радиолюбителей. / djvu, размер: 2.51 MB/

• Импульсные блоки питания для IBM PC. Ремонт и обслуживание. Куличков А. В. 2002. Книга посвящена вопросам ремонта и обслуживания импульсных источников вторичного электропитания, которые используются практически во всем современном импортном и отечественном радиоэлектронном оборудовании. В книге рассмотрены теоретические вопросы проектирования и расчета импульсных источников питания, подробно описаны основы их схемотехники и принципы функционирования. Описываются различные способы стабилизации выходных напряжений, способы защиты источников питания от перегрузок во вторичных цепях, а также рассматриваются способы отключения источников питания при повышении выходных напряжений выше установленных пределов. В качестве примеров рассмотрены источники питания современных компьютеров AT и ATX форм-факторов. В соответствующих разделах рассмотрены типовые неисправности и методы их поиска и устранения. / djvu, размер: 2.78 MB/

• Микросхемы для импульсных источников питания и их применение. Казначеев В.А.,Кирюхин И.С. 2001. Просто хороший справочник. / djvu, размер: 17.32 MB/

• Импульсные источники питания в бытовой аппаратуре. Митрофанов А.В., Щеголёв А.И. 1985. Рассмотрены основные принципы построения импульсных источников вторичного электропитания (с бестрансформаторным входом) применительно к бытовой радиоаппаратуре. Приводятся сведения об электронных компонентах: мощных высоковольтных ключевых транзисторах, быстродействующих выпрямительных диодах, импульсных трансформаторах. Описаны конкретные практические схемы импульсных источников электропитания, применяемые в отечественной и зарубежной бытовой радиоаппаратуре.
Для инженерно-технических работников, занятых разработкой радиоэлектронной аппаратуры, и может быть полезна квалифицированным радиолюбителям. / djvu, размер: 1.05 MB/

• Решения для импульсных источников питания Схемотехника, принципы работы, проектирование, выбор элементов. / pdf, размер: 5.43 MB/

• Supply Unit Repair At-xt Техническое описание и ремонт блоков питания IBM PC. / djvu, размер: 1.17 MB/

• Практические советы по ремонту бытовой радиоэлектронной аппаратуры. Книга 2. Столовых А.М. 2005. Второе издание. Книга предназначена для широкого круга читателей, профессионально занимающихся ремонтом бытовой электронной техники, она может быть полезна тем, кто хочет сам освоить ремонт аппаратуры, находящейся в домашнем пользовании, но не имеет достаточного опыта в этом деле. Автор делится своими секретами ремонта и маленькими хитростями, применяемыми многими мастерами в ремонтной практике. / djvu, размер: 2.33 MB/

• Code: 0030
• Description: FAX control PWB system error
  Processing with the fax software was disabled due to a hardware problem.
• Causes: Defective FAX control PWB.
• Remedy: Replace the fax control PWB and check for correct operation.

• Code: 0070
• Description: FAX control PWB incompatible detection error
  Abnormal detection of FAX control PWB incompatibility In the initial communication with the FAX control PWB, any normal communication command is not transmitted.
• Causes: Defective FAX software.
  Defective FAX control PWB.
• Remedy: Defective FAX software. Install the fax software.
  Defective FAX control PWB. Replace the fax control PWB and check for correct operation.

• Code: 0100
• Description: Backup memory device error
• Causes: Defective flash memory.
  Defective main PWB.
• Remedy: Defective flash memory. Replace the main PWB and check for correct operation.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 0120
• Description: MAC address data error
  For data in which the MAC address is invalid.
• Causes: Defective flash memory.
  Defective engine PWB.
• Remedy: Defective flash memory. Replace the main PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 0150
• Description: Backup memory read/write error (engine PWB)
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated 5 times successively. Mismatch of reading data from 2 locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Improper installation EEPROM.
  Device damage of EEPROM.
• Remedy: Improper installation EEPROM. Check the installation of the EEPROM and remedy if necessary.
  Defective engine PWB. Replace the engine PWB and check for correct operation.
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: 0160
• Description: Backup memory data error
  (engine PWB) Reading data from EEPROM is abnormal.
• Causes: Data damage of EEPROM.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.

• Code: 0170
• Description: Billing counting error
  A checksum error is detected in the main and engine backup memories for the billing counters.
• Causes: Data damage of EEPROM.
  Defective PWB.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.
  Defective PWB. Replace the main PWB or the engine PWB and check for correct operation.

• Code: 0180
• Description: Machine number mismatch
  Machine number of main and engine does not match.
• Causes: Data damage of EEPROM.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.

• Code: 0620
• Description: FAX image DIMM error
  DIMM is not installed correctly. DIMM cannot be accessed.
• Causes: DIMM installed incorrectly.
  Defective main PWB.
• Remedy: DIMM installed incorrectly. Check if the DIMM is inserted into the socket on the main PWB correctly.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 0630
• Description: DMA error
  DMA transmission of image data does not complete within the specified period of time.
• Causes: Poor contact in the connector terminals.
  Defective main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection the signal cable for CIS and the main PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 0640
• Description: Hard disk error
  The hard disk cannot be accessed.
• Causes: Defective hard disk.
  Defective main PWB.
• Remedy: Defective hard disk. Replace the hard disk and check for correct operation.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 0650
• Description: FAX image DIMM check error
  Improper DIMM is installed.
• Causes: DIMM installed incorrectly.
  Defective main PWB.
• Remedy: DIMM installed incorrectly. Check if the DIMM is inserted into the socket on the main PWB correctly.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 0800
• Description: Image processing error
  JAM010X is detected twice.
• Causes: Defective main PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: 0830
• Description: FAX control PWB flash program area checksum error
  A checksum error occurred with the program of the FAX control PWB.
• Causes: Defective FAX software.
  Defective FAX control PWB.
• Remedy: Defective FAX software. Install the fax software.
  Defective FAX control PWB. Replace the fax control PWB and check for correct operation.

• Code: 0840
• Description: Faults of RTC
  The time is judged to go back based on the comparison of the RTC time and the current time or five years or more have passed.
• Causes: The battery is disconnected from the main PWB.
  Defective main PWB.
• Remedy: The battery is disconnected from the main PWB. Check visually and remedy if necessary
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 0870
• Description: FAX control PWB to main PWB high capacity data transfer error
  High-capacity data transfer between the FAX control PWB and the main PWB of the machine was not normally performed even if the data transfer was retried the specified times.
• Causes: Improper installation FAX control PWB.
  Defective FAX control PWB or main PWB.
• Remedy: Improper installation FAX control PWB. Reinstall the FAX control PWB.
  Defective FAX control PWB or main PWB. Replace the FAX control PWB or main PWB and check for correct operation.

• Code: 0900
• Description: FAX software incompatible detection error
  Incompatible FAX control PWB is installed.
• Causes: Defective FAX software.
  Defective FAX control PWB.
• Remedy: Defective FAX software. Install the fax software.
  Defective FAX control PWB. Replace the fax control PWB and check for correct operation.

• Code: 0920
• Description: Fax file system error
  The backup data is not retained for file system abnormality of flash memory of the FAX control PWB.
• Causes: Defective FAX control PWB.
• Remedy: Replace the fax control PWB and check for correct operation.

• Code: 0970
• Description: 12 V power down detect
  Power is disconnected during sleeping.
• Causes: Defective power source PWB.
• Remedy: Replace the power source PWB and check for correct operation.

• Code: 0980
• Description: 24 V power down detect
  24V disconnection signal is detected for 1 s and 12V disconnection signal is not detected.
• Causes: Defective power source PWB.
• Remedy: Replace the power source PWB and check for correct operation.

• Code: 1000
• Description: MP lift motor error
  After the MP lift motor is driven, the ON status of MP lift sensors 1 and 2 cannot be detected for 1.5 s.
• Causes: Defective MP plate elevation mechanism.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective MP lift motor.
  Defective engine PWB.
• Remedy: Defective MP plate elevation mechanism. Check to see if the MP plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. MP lift motor and relay PWB (YC3) Relay PWB (YC12) and feed PWB 1 (YC17) Feed PWB 1 (YC1) and engine PWB (YC6)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective MP lift motor. Replace the MP lift motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 1010
• Description: Lift motor 1 error
  After cassette 1 is inserted, lift sensor 1 does not turn on within 12 s. This error is detected 4 times successively. The lock signal of the motor is detected continuously for 1 s.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor
  Defective lift motor 1.
  Defective engine PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Lift motor 1 and feed PWB 2 (YC3) Feed PWB 2 (YC1) and engine PWB (YC4)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective lift motor 1. Replace the lift motor 1.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 1020
• Description: Lift motor 2 error
  After cassette 2 is inserted, lift sensor 2 does not turn on within 12 s. This error is detected 4 times successively. The lock signal of the motor is detected continuously for 1 s.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective lift motor 2.
  Defective engine PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Lift motor 2 and feed PWB 2 (YC3) Feed PWB 2 (YC1) and engine PWB (YC4)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective lift motor 2. Replace the lift motor 2.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 1030
• Description: PF lift motor 1 error (paper feeder)
  After cassette 3 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 1 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1040
• Description: PF lift motor 2 error (paper feeder)
  After cassette 4 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1050
• Description: SM lift motor error (side multi tray)
  After cassette 5 is inserted, SM lift sensor does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective SM lift motor.
  Defective SM main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. SM lift motor and SM main PWB (YC5)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective SM lift motor. Replace the SM lift motor.
  Defective SM main PWB. Replace the SM main PWB (Refer to the service manual for the paper feeder).

• Code: 1060
• Description: PF lift motor 1 error (side paper feeder)
  After cassette 6 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 1 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1070
• Description: PF lift motor 2 error (side paper feeder)
  After cassette 7 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1100
• Description: PF lift motor 1 error (large capacity feeder)
  After cassette 3 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected 2 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 500 ms or more 2 times successively. However, the first 1 s after PF lift motor 1 is turned on is excluded from detection.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 1 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1110
• Description: PF lift motor 2 error (large capacity feeder)
  After cassette 4 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 2 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 500 ms or more 2 times successively. However, the first 1 s after PF lift motor 2 is turned on is excluded from detection.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1040
• Description: PF lift motor 2 error (paper feeder)
  After cassette 4 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1050
• Description: SM lift motor error (side multi tray)
  After cassette 5 is inserted, SM lift sensor does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective SM lift motor.
  Defective SM main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. SM lift motor and SM main PWB (YC5)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective SM lift motor. Replace the SM lift motor.
  Defective SM main PWB. Replace the SM main PWB (Refer to the service manual for the paper feeder).

• Code: 1060
• Description: PF lift motor 1 error (side paper feeder)
  After cassette 6 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 1 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1070
• Description: PF lift motor 2 error (side paper feeder)
  After cassette 7 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1100
• Description: PF lift motor 1 error (large capacity feeder)
  After cassette 3 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected 2 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 500 ms or more 2 times successively. However, the first 1 s after PF lift motor 1 is turned on is excluded from detection.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 1 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1110
• Description: PF lift motor 2 error (large capacity feeder)
  After cassette 4 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 2 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 500 ms or more 2 times successively. However, the first 1 s after PF lift motor 2 is turned on is excluded from detection.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1040
• Description: PF lift motor 2 error (paper feeder)
  After cassette 4 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1050
• Description: SM lift motor error (side multi tray)
  After cassette 5 is inserted, SM lift sensor does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective SM lift motor.
  Defective SM main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. SM lift motor and SM main PWB (YC5)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective SM lift motor. Replace the SM lift motor.
  Defective SM main PWB. Replace the SM main PWB (Refer to the service manual for the paper feeder).

• Code: 1060
• Description: PF lift motor 1 error (side paper feeder)
  After cassette 6 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 1 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1070
• Description: PF lift motor 2 error (side paper feeder)
  After cassette 7 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1100
• Description: PF lift motor 1 error (large capacity feeder)
  After cassette 3 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected 2 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 500 ms or more 2 times successively. However, the first 1 s after PF lift motor 1 is turned on is excluded from detection.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 1 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1110
• Description: PF lift motor 2 error (large capacity feeder)
  After cassette 4 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 2 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 500 ms or more 2 times successively. However, the first 1 s after PF lift motor 2 is turned on is excluded from detection.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1040
• Description: PF lift motor 2 error (paper feeder)
  After cassette 4 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1050
• Description: SM lift motor error (side multi tray)
  After cassette 5 is inserted, SM lift sensor does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective SM lift motor.
  Defective SM main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. SM lift motor and SM main PWB (YC5)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective SM lift motor. Replace the SM lift motor.
  Defective SM main PWB. Replace the SM main PWB (Refer to the service manual for the paper feeder).

• Code: 1060
• Description: PF lift motor 1 error (side paper feeder)
  After cassette 6 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 1 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1070
• Description: PF lift motor 2 error (side paper feeder)
  After cassette 7 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 5 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 1 s or more 5 times successively. However, the first 1 s after motor is turned on is excluded from detection.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1100
• Description: PF lift motor 1 error (large capacity feeder)
  After cassette 3 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected 2 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 500 ms or more 2 times successively. However, the first 1 s after PF lift motor 1 is turned on is excluded from detection.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 1 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1110
• Description: PF lift motor 2 error (large capacity feeder)
  After cassette 4 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected 2 times successively. During driving the motor, the lift overcurrent protective monitor signal is detected for 500 ms or more 2 times successively. However, the first 1 s after PF lift motor 2 is turned on is excluded from detection.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 2104
• Description: Developer motor Y error
  After developer motor Y is driven, the ready signal does not turn to L within 5 s. After developer motor Y is stabilized, the ready signal is at the H level for 5 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective developer motor Y.
  Defective engine PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer motor Y and motor control PWB (YC6) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective developer motor Y. Replace the developer motor Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2201
• Description: Drum motor K steady-state error
  After drum motor K is stabilized, the ready signal is at the H level for 5 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor K and motor control PWB (YC5) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor K. Replace the drum motor K.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2202
• Description: Drum motor C steady-state error
  Drum motor C does not keep the steadystate speed for 5 s successively since the motor is stabilized.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor C and motor control PWB (YC4) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor C. Replace the drum motor C.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2203
• Description: Drum motor M steady-state error
  Drum motor M does not keep the steadystate speed for 5 s successively since the motor is stabilized.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor M and motor control PWB (YC5) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor M. Replace the drum motor M.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2204
• Description: Drum motor Y steady-state error
  Drum motor Y does not keep the steadystate speed for 5 s successively since the motor is stabilized.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor Y and motor control PWB (YC4) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor Y. Replace the drum motor Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2211
• Description: Drum motor K startup error
  Drum motor K is not stabilized within 5 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor K and motor control PWB (YC5) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor K. Replace the drum motor K.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2212
• Description: Drum motor C startup error
  Drum motor C is not stabilized within 5 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor C and motor control PWB (YC4) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor C. Replace the drum motor C.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2213
• Description: Drum motor M startup error
  Drum motor M is not stabilized within 5 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor M and motor control PWB (YC5) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor M. Replace the drum motor M.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2214
• Description: Drum motor Y startup error
  Drum motor Y is not stabilized within 5 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor Y and motor control PWB (YC4) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor Y. Replace the drum motor Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2231
• Description: Drum motor K main sensor error
  No signal is input to the sensor for 100 ms continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor K.
  Defective engine PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor K and motor control PWB (YC5) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor K. Replace the drum motor K.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2232
• Description: Drum motor C main sensor error
  No signal is input to the sensor for 100 ms continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor C and motor control PWB (YC4) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor C. Replace the drum motor C.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2233
• Description: Drum motor M main sensor error
  No signal is input to the sensor for 100 ms continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor
  Defective drum motor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor M and motor control PWB (YC5) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor M. Replace the drum motor M.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2234
• Description: Drum motor Y main sensor error No signal is input to the sensor for 100 ms continuously.
• Causes: Defective connector cable or poor contact in the connector
  Defective drive transmission system of motor.
  Defective drum motor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor Y and motor control PWB (YC4) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor Y. Replace the drum motor Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2241
• Description: Drum motor K sub sensor error
  No signal is input to the sensor for 100 ms continuously
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor K and motor control PWB (YC5) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor K. Replace the drum motor K.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2242
• Description: Drum motor C sub sensor error
  No signal is input to the sensor for 100 ms continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor C and motor control PWB (YC4) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor C. Replace the drum motor C.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2243
• Description: Drum motor M sub sensor error
  No signal is input to the sensor for 100 ms continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor M and motor control PWB (YC5) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor M. Replace the drum motor M.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2244
• Description: Drum motor Y sub sensor error
  No signal is input to the sensor for 100 ms continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective drum motor Y.
  Defective engine PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor Y and motor control PWB (YC4) Motor control PWB (YC3) and engine PWB (YC9)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor Y. Replace the drum motor Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2300
• Description: Fuser motor error
  After fuser motor is driven, the ready signal does not turn to L within 2 s. After fuser motor is stabilized, the ready signal is at the H level for 1 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective fuser motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser motor and feed PWB 1 (YC18) Feed PWB 1 (YC1) and engine PWB (YC6)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective fuser motor. Replace the fuser motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2550
• Description: Paper feed motor error
  After paper feed motor is driven, the ready signal does not turn to L within 2 s. After paper feed motor is stabilized, the ready signal is at the H level for 1 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective paper feed motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Paper feed motor and feed PWB 2 (YC2) Feed PWB 2 (YC1) and engine PWB (YC4)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective paper feed motor. Replace the paper feed motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2600
• Description: PF paper feed motor error (large capacity feeder)
  After PF paper feed motor is driven, the ready signal does not turn to L within 2 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF paper feed motor
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF paper feed motor and PF main PWB (YC16)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF paper feed motor. Replace the PF paper feed motor.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 2610
• Description: PF paper feed motor error (paper feeder)
  After PF paper feed motor is driven, the ready signal does not turn to L within 2 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF paper feed motor
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF paper feed motor and PF main PWB (YC16)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF paper feed motor. Replace the PF paper feed motor.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 2640
• Description: SD paper feed motor error (side deck)
  After SD paper feed motor is driven, the ready signal does not turn to L within 2 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective SD paper feed motor
  Defective SD main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. SD paper feed motor and SD main PWB (YC16)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective SD paper feed motor. Replace the SD paper feed motor.
  Defective SD main PWB. Replace the SD main PWB (Refer to the service manual for the paper feeder).

• Code: 2650
• Description: SM paper feed motor error (side multi tray)
  After SM paper feed motor is driven, the ready signal does not turn to L within 2 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective SM paper feed motor.
  Defective SM main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. SM paper feed motor and SM main PWB (YC5)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective SM paper feed motor. Replace the SM paper feed motor.
  Defective SM main PWB. Replace the SM main PWB (Refer to the service manual for the paper feeder).

• Code: 2660
• Description: PF paper feed motor error (side large capacity feeder)
  After PF paper feed motor is driven, the ready signal does not turn to L within 2 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF paper feed motor.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF paper feed motor and PF main PWB (YC16)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF paper feed motor. Replace the PF paper feed motor.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 2670
• Description: PF paper feed motor error (side paper feeder)
  After PF paper feed motor is driven, the ready signal does not turn to L within 2 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective PF paper feed motor.
  Defective PF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF paper feed motor and PF main PWB (YC16)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF paper feed motor. Replace the PF paper feed motor.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 2700
• Description: Color release motor error
  When the color release motor is driven, the color release sensor does not turn on/off for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective color release motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Color release motor and engine PWB (YC3)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective color release motor. Replace the color release motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2730
• Description: Transfer release motor error
  When the transfer release motor is driven, the transfer release sensor does not turn on/off for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective transfer release motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Transfer release motor and relay PWB (YC14) Relay PWB (YC14) and feed PWB 1 (YC14) Feed PWB 1 (YC1) and engine PWB (YC6)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective transfer release motor. Replace the transfer release motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2760
• Description: Transfer motor startup error
  Transfer motor is not stabilized within 5 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor
  Defective transfer motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Transfer motor and feed PWB 1 (YC13) Feed PWB 1 (YC2) and engine PWB (YC5)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective transfer motor. Replace the transfer motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2770
• Description: Transfer skew error
  An abnormal value is detected to transfer skew sensor.
• Causes: Defective connector cable or poor contact in the connector.
  Defective transfer skew sensor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Transfer belt unit and engine PWB (YC3)
  Defective transfer skew sensor. Replace the transfer skew sensor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2780
• Description: Transfer skew sensor error
  An abnormal value is detected to transfer skew sensor.
• Causes: Defective connector cable or poor contact in the connector.
  Defective transfer skew sensor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Transfer belt unit and engine PWB (YC3)
  Defective transfer skew sensor. Replace the transfer skew sensor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2790
• Description: Transfer skew motor error
  When the transfer skew motor is driven, timeouts were detected twice in a row.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective transfer skew motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Transfer skew motor and engine PWB (YC3)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective transfer skew motor. Replace the transfer skew motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2810
• Description: Waste toner motor error
  Initialized when an error is constantly observed for 2 seconds after the waste toner motor is activated. An error is constantly observed for 2.5 seconds after rebooting.
• Causes: Defective connector cable or poor contact in the connector
  Defective drive transmission system of motor.
  Defective waste toner motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Waste toner motor and front PWB (YC5) Front PWB (YC3) and engine PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective waste toner motor. Replace the waste toner motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2820
• Description: Transfer motor steady-state error Transfer motor is not stabilized within 5 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective transfer motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Transfer motor and feed PWB 1 (YC13) Feed PWB 1 (YC2) and engine PWB (YC5)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective transfer motor. Replace the transfer motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2840
• Description: Transfer cleaning motor error
  After transfer cleaning motor is driven, the ready signal does not turn to L within 2 s.
  After transfer cleaning motor is stabilized, the ready signal is at the H level for 1 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective transfer cleaning motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Transfer cleaning motor and engine PWB (YC3)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective transfer cleaning motor. Replace the transfer cleaning motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2850
• Description: Transfer belt sensor error
  The signal is not received for 100 ms in succession.
• Causes: Defective connector cable or poor contact in the connector
  Defective transfer belt sensor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Transfer belt sensor and engine PWB (YC3)
  Defective transfer belt sensor. Replace the transfer belt sensor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2860
• Description: Transfer belt sensor error
  The signal is not received for 100 ms in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective transfer belt sensor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Transfer belt sensor and engine PWB (YC3)
  Defective transfer belt sensor. Replace the transfer belt sensor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2950
• Description: Motor control PWB communication error
  A communication error from the motor control PWB is detected 10 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective motor control PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Motor control PWB (YC3) and engine PWB (YC9)
  Defective motor control PWB. Replace the motor control PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 3100
• Description: Scanner carriage error
  The home position is not correct when the power is turned on or at the start of copying using the table.
• Causes: Defective connector cable or poor contact in the connector.
  Defective home position sensor.
  Defective scanner motor.
  Defective ISC PWB.
  Defective main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Home position sensor and ISC PWB (YC8) Scanner motor and ISC PWB (YC5) ISC PWB (YC3) and main PWB (YC11)
  Defective home position sensor. Replace the home position sensor.
  Defective scanner motor. Replace the scanner motor.
  Defective ISC PWB. Replace the ISC PWB and check for correct operation.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 3200
• Description: Exposure lamp error
  When input value at the time of LED lamp PWB illumination does not exceed the threshold value between 5 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective LED lamp PWB.
  Defective ISC PWB.
  Defective main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. LED lamp PWB and ISC PWB (YC6) ISC PWB (YC3) and main PWB (YC11)
  Defective LED lamp PWB. Replace the LED lamp PWB and check for correct operation.
  Defective ISC PWB. Replace the ISC PWB and check for correct operation.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 3210
• Description: CIS lamp error
  When input value at the time of CIS illumination does not exceed the threshold value between 5 s.
• Causes: Defective connector cable or poor contact in the connector
  Defective CIS.
  Defective DPSHD PWB.
  Defective DP relay PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CIS and DPSHD PWB (YC2) DPSHD PWB (YC3) and DP relay PWB (YC2)
  Defective CIS. Replace the CIS and check for correct operation.
  Defective DPSHD PWB. Replace the DPSHD PWB and check for correct operation.
  Defective DP relay PWB. Replace the DP relay PWB and check for correct operation.

• Code: 3300
• Description: Optical system (AGC) error
  After AGC, correct input is not obtained at CCD.
• Causes: Defective connector cable or poor contact in the connector.
  Defective exposure lamp.
  Defective CCD PWB.
  Defective ISC PWB.
  Defective main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CCD PWB (YC2) and ISC PWB (YC9) ISC PWB (YC3) and main PWB (YC11)
  Defective exposure lamp. Replace the LED lamp PWB and check for correct operation.
  Defective CCD PWB. Replace the CCD PWB and check for correct operation.
  Defective ISC PWB. Replace the ISC PWB and check for correct operation.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 3310
• Description: CIS AGC error
  After AGC, correct input is not obtained at CIS.
• Causes: Defective CIS.
  Defective DPSHD PWB.
  Defective DP relay PWB.
• Remedy: Defective CIS. Replace the CIS and check for correct operation.
  Defective DPSHD PWB. Replace the DPSHD PWB and check for correct operation.
  Defective DP relay PWB. Replace the DP relay PWB and check for correct operation.

• Code: 3500
• Description: Communication error between scanner and ASIC An error code is detected.
• Causes: Defective connector cable or poor contact in the connector
  Defective ISC PWB.
  Defective main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. ISC PWB (YC3) and main PWB (YC11)
  Defective ISC PWB. Replace the ISC PWB and check for correct operation.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 3600
• Description: Scanner sequence error
• Causes: Defective ISC PWB.
• Remedy: Replace the ISC PWB and check for correct operation.

• Code: 3700
• Description: Scanner device error
• Causes: CCD connector inserted incorrectly.
• Remedy: Reinsert the image scanner unit connector if necessary.

• Code: 3800
• Description: AFE error
  When writing the data, read and write data does not match 3 times in succession.
• Causes: Defective ISC PWB.
• Remedy: Replace the ISC PWB and check for correct operation.

• Code: 3900
• Description: Backup memory read/write error (ISC PWB)
  Read and write data does not match.
• Causes: Defective backup memory or PWB.
• Remedy: Replace the ISC PWB and check for correct operation.

• Code: 4001
• Description: Polygon motor K synchronization error
  After polygon motor K is driven, the ready signal does not turn to L within 30 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective polygon motor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Polygon motor K and LSU relay PWB (YC4) LSU relay PWB (YC4) and engine PWB (YC12)
  Defective polygon motor K. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4002
• Description: Polygon motor C synchronization error
  After polygon motor C is driven, the ready signal does not turn to L within 30 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective polygon motor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Polygon motor C and LSU relay PWB (YC9) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective polygon motor C. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4003
• Description: Polygon motor M synchronization error
  After polygon motor M is driven, the ready signal does not turn to L within 30 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective polygon motor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Polygon motor M and LSU relay PWB (YC7) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective polygon motor M. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4004
• Description: Polygon motor Y synchronization error
  After polygon motor Y is driven, the ready signal does not turn to L within 30 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective polygon motor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Polygon motor Y and LSU relay PWB (YC11) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective polygon motor Y. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4011
• Description: Polygon motor K steady-state error
  After polygon motor K is stabilized, the ready signal is at the H level for 15 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective polygon motor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Polygon motor K and LSU relay PWB (YC4) LSU relay PWB (YC4) and engine PWB (YC12)
  Defective polygon motor K. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4012
• Description: Polygon motor C steady-state error
  After polygon motor C is stabilized, the ready signal is at the H level for 15 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective polygon motor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Polygon motor C and LSU relay PWB (YC9) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective polygon motor C. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4013
• Description: Polygon motor M steady-state error
  After polygon motor M is stabilized, the ready signal is at the H level for 15 s continuously.
• Causes: Defective connector cable or poor contact in the connector
  Defective polygon motor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Polygon motor M and LSU relay PWB (YC7) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective polygon motor M. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4014
• Description: Polygon motor Y steady-state error
  After polygon motor Y is stabilized, the ready signal is at the H level for 15 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective polygon motor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Polygon motor Y and LSU relay PWB (YC11) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective polygon motor Y. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4101
• Description: BD initialization error K
  After polygon motor K is driven, ASIC detects a BD error for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PD PWB K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC5) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB K. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4102
• Description: BD initialization error C
  After polygon motor C is driven, ASIC detects a BD error for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PD PWB C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC10) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB C. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4103
• Description: BD initialization error M
  After polygon motor M is driven, ASIC detects a BD error for 1 s
• Causes: Defective connector cable or poor contact in the connector.
  Defective PD PWB M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC8) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB M. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4104
• Description: BD initialization error Y
  After polygon motor Y is driven, ASIC detects a BD error for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PD PWB Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC12) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB Y. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4201
• Description: BD steady-state error K
  The BD signal is not detected.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PD PWB K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC5) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB K. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4202
• Description: BD steady-state error C
  The BD signal is not detected.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PD PWB C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC10) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB C. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4203
• Description: BD steady-state error M
  The BD signal is not detected.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PD PWB M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC8) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB M. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4204
• Description: BD steady-state error Y
  The BD signal is not detected.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PD PWB Y.
  Defective engine PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC12) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective PD PWB Y. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4300
• Description: Polygon motor phase error
  ASIC won’t settle in completion of phase adjustment for 2 seconds after a BD signal is detected.
• Causes: Defective laser scanner unit.
  Defective engine PWB.
• Remedy: Defective laser scanner unit. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4600
• Description: LSU cleaning motor error
  After LSU cleaning motor is driven, the ready signal does not turn to L within 2 s. After LSU cleaning motor is stabilized, the ready signal is at the H level for 1 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective LSU cleaning motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. LSU cleaning motor and engine PWB (YC21)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective LSU cleaning motor. Replace the LSU cleaning motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 5101
• Description: Main high-voltage error K
  Abnormality of charger roller K is detected when Vpp adjustment.
• Causes: Defective connector cable or poor contact in the connector.
  Defective high voltage PWB 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. High voltage PWB 1 (YC4) and engine PWB (YC17)
  Defective high voltage PWB 1. Replace the high voltage PWB 1 and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 5102
• Description: Main high-voltage error C
  Abnormality of charger roller C is detected when Vpp adjustment.
• Causes: Defective connector cable or poor contact in the connector.
  Defective high voltage PWB 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. High voltage PWB 1 (YC2) and engine PWB (YC16)
  Defective high voltage PWB 1. Replace the high voltage PWB 1 and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 5103
• Description: Main high-voltage error M
  Abnormality of charger roller M is detected when Vpp adjustment.
• Causes: Defective connector cable or poor contact in the connector.
  Defective high voltage PWB 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. High voltage PWB 1 (YC3) and engine PWB (YC17)
  Defective high voltage PWB 1. Replace the high voltage PWB 1 and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 5104
• Description: Main high-voltage error Y
  Abnormality of charger roller Y is detected when Vpp adjustment.
• Causes: Defective connector cable or poor contact in the connector.
  Defective high voltage PWB 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. High voltage PWB 1 (YC1) and engine PWB (YC16)
  Defective high voltage PWB 1. Replace the high voltage PWB 1 and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6000
• Description: Broken fuser heater wire
  Fuser thermistor 1 does not reach 100° C/212 °F even after 60 s during warming up. The detected temperature of fuser thermistor 1 does not reach the specified temperature (ready indication temperature) for 60 s in warming up after reached to 100° C/212 °F.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Fuser thermostat triggered.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Power source PWB (YC3) and fuser IH PWB (YC1) Fuser IH PWB (YC4) and engine PWB (YC26)
  Fuser thermostat triggered. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6020
• Description: Abnormally high fuser thermistor 1 temperature
  Fuser thermistor 1 detects a temperature higher than 240°C/464°F for 1 s.
• Causes: Deformed connector pin.
  Defective triac.
  Shorted fuser thermistor 1.
  Defective engine PWB.
• Remedy: Shorted fuser thermistor 1. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6030
• Description: Broken fuser thermistor 1 wire
  Input from fuser thermistor 1 is 984 or more (A/D value) continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Broken fuser thermistor 1 wire.
  Fuser thermostat triggered.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Broken fuser thermistor 1 wire. Replace the fuser unit.
  Fuser thermostat triggered. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6040
• Description: Fuser heater error
  Input from fuser thermistor 1 is abnormal value continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Broken fuser thermistor 1 wire
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Broken fuser thermistor 1 wire. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6050
• Description: Abnormally low fuser thermistor 1 temperature
  Fuser thermistor 1 detects a temperature lower than 100°C/212°F for 1 s after warming up.
• Causes: Deformed connector pin.
  Defective triac.
  Defective fuser thermistor 1.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective fuser thermistor 1. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6100
• Description: Broken fuser heater wire
  Fuser thermistor 5 won’t reach the reference temperature in 480 s when shifting to low power mode.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Broken fuser thermistor 5 wire.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Broken fuser thermistor 5 wire. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6120
• Description: Abnormally high fuser thermistor 4 temperature
  Fuser thermistor 1 detects a temperature higher than 190°C/374°F for 1 s.
• Causes: Deformed connector pin.
  Defective triac.
  Shorted fuser thermistor 4.
  Defective engine PWB.
• Remedy: Shorted fuser thermistor 5. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6130
• Description: Broken fuser thermistor 4 wire
  Input from fuser thermistor 4 is 992 or more (A/D value) continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Broken fuser thermistor 4 wire.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Broken fuser thermistor 5 wire. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6150
• Description: Abnormally low fuser thermistor 4 temperature
  Fuser thermistor 4 detects a temperature lower than 30°C/ 86°F for 1 s after warming up.
• Causes: Deformed connector pin.
  Defective triac.
  Defective fuser thermistor 1.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective fuser thermistor 5. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6200
• Description: Broken fuser edge heater wire
  Fuser thermistor 2 does not reach 100° C/212 °F even after 60 s during warming up. The detected temperature of fuser thermistor 2 does not reach the specified temperature (ready indication temperature) for 60 s in warming up after reached to 100° C/212 °F.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Fuser thermostat triggered.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Power source PWB (YC3) and fuser IH PWB (YC1) Fuser IH PWB (YC4) and engine PWB (YC26)
  Fuser thermostat triggered. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6220
• Description: Abnormally high fuser thermistor 2 temperature
  Fuser thermistor 2 detects a temperature higher than 250°C/482°F for 1 s.
• Causes: Deformed connector pin.
  Defective triac.
  Shorted fuser thermistor 2.
  Defective engine PWB.
• Remedy: Shorted fuser thermistor 2. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6230
• Description: Broken fuser thermistor 2 wire
  Input from fuser thermistor 2 is 992 or more (A/D value) continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Broken fuser thermistor 2 wire.
  Fuser thermostat triggered.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Broken fuser thermistor 2 wire. Replace the fuser unit.
  Fuser thermostat triggered. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6250
• Description: Abnormally low fuser thermistor 2 temperature
  Fuser thermistor 2 detects a temperature lower than 50°C/ 122°F for 1 s after warming up.
• Causes: Deformed connector pin.
  Defective triac.
  Defective fuser thermistor 2.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective fuser thermistor 2. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6320
• Description: Abnormally high fuser thermistor 3 temperature
  Fuser thermistor 3 detects a temperature higher than 240°C/464°F for 1 s.
• Causes: Deformed connector pin.
  Defective triac.
  Shorted fuser thermistor 3.
  Defective engine PWB.
• Remedy: Shorted fuser thermistor 3. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6330
• Description: Broken fuser thermistor 3 wire
  Input from fuser thermistor 3 is 992 or more (A/D value) continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Broken fuser thermistor 3 wire.
  Fuser thermostat triggered.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Broken fuser thermistor 3 wire. Replace the fuser unit.
  Fuser thermostat triggered. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6520
• Description: Abnormally high fuser thermistor 4 temperature
  Fuser thermistor 4 detects a temperature higher than 240C/464F for 1 s.
• Causes: Deformed connector pin.
  Defective triac.
  Shorted fuser thermistor 4.
  Defective engine PWB
• Remedy: Shorted fuser thermistor 4. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6530
• Description: Broken fuser thermistor 4 wire
  Input from fuser thermistor 4 is 992 or more (A/D value) continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Broken fuser thermistor 4 wire.
  Fuser thermostat triggered.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Broken fuser thermistor 4 wire. Replace the fuser unit.
  Fuser thermostat triggered. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6600
• Description: Fuser belt rotation error
  A belt rotating pulse is not received for 1 second. (Engine CPU)
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser belt sensor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Defective fuser belt sensor. Replace the fuser belt sensor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6610
• Description: Fuser release motor error
  When the fuser release motor is driven, the fuser release sensor does not turn on/off for 5 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective fuser release motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective fuser release motor. Replace the fuser release motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6620
• Description: IH core motor error
  When the IH core motor is driven, the IH core sensor does not turn off for 5 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective IH core motor.
  Defective front PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. IH core motor and front PWB (YC10) Front PWB (YC3) and engine PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective IH core motor. Replace the IH core motor.
  Defective front PWB. Replace the front PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6710
• Description: Fuser IH PWB CPU reset error
  Watch doc timer has been overflowed.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser IH PWB
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26)
  Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6720
• Description: Fuser IH belt rotation error
  A belt rotating pulse is not received for 1 second.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser belt sensor.
  Defective engine PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Defective fuser belt sensor. Replace the fuser belt sensor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6730
• Description: Abnormally high fuser IH PWB temperature 1
  The input detect temperature is greater than 105°C/221 °F.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser IH PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26)
  Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6740
• Description: Abnormally high fuser IH PWB temperature 2
  The input detect temperature is greater than 105°C/221 °F.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser IH PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26)
  Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6750
• Description: Fuser IH output over-current error
  The output current is greater than 75A for 10 ms in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser IH PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26)
  Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6760
• Description: Fuser IH input over-current error
  The input current is greater than 20A for 100 ms in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser IH PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26)
  Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6770
• Description: Fuser IH low electric power error
  The preset power is less than 0.6 times of it for 120 ms in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser IH PWB
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26)
  Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6780
• Description: Fuser IH input over-voltage error
  The input voltage is greater than 140V for 200 ms in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser IH PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26)
  Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6900
• Description: Fuser front fan motor error
  When the fuser front fan motor is driven, alarm signal is detected for 5 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser front fan motor.
  Defective engine PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser front fan motor and front PWB (YC4) Front PWB (YC3) and engine PWB (YC7)
  Defective fuser front fan motor. Replace the fuser front fan motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6910
• Description: Fuser rear fan motor error
  When the fuser rear fan motor is driven, alarm signal is detected for 5 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser rear fan motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser rear fan motor and engine PWB (YC26)
  Defective fuser rear fan motor. Replace the fuser rear fan motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6920
• Description: Fuser edge fan motor 1 error
  When the fuser edge fan motor 1 is driven, alarm signal is detected for 5 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser edge fan motor 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser edge fan motor and engine PWB (YC26)
  Defective fuser edge fan motor 1. Replace fuser edge fan motor 1
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6930
• Description: Fuser edge fan motor 2 error
  When the fuser edge fan motor 2 is driven, alarm signal is detected for 5 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser edge fan motor 2.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, Fuser edge fan motor 2 and fuser PWB (YC2) Fuser PWB (YC1) and engine PWB (YC26)
  Defective fuser edge fan motor 2. Replace fuser edge fan motor 2.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6940
• Description: IH fan motor error
  When the IH fan motor is driven, the alarm signal is detected for 5 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective IH fan motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. IH fan motor and feed PWB 1 (YC11) Feed PWB 1 (YC2) and engine PWB (YC5)
  Defective IH fan motor. Replace the IH fan motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6950
• Description: Fuser IH PWB communication error
  No response is received in 30 ms since a command is sent to IHCPU. A checksum error is detected 10 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective fuser IH PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26)
  Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6960
• Description: Current PWB error
  Less than 1A is continuously observed for 5 seconds.
• Causes: Defective current PWB.
• Remedy: Replace the current PWB and check for correct operation.

• Code: 6990
• Description: Fuser power supply incompatibility
  Information won’t match between the engine backup and the fuser IH PWB.
• Causes: Defective fuser IH PWB.
  Defective engine PWB.
• Remedy: Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7001
• Description: Toner motor K error
  A state in which the lock signal is detected for 20 times has been detected 3 times during the toner motor K is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective screw sensor K.
  Defective toner motor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner motor K and engine PWB (YC27)
  Defective toner motor K. Replace the toner motor K.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7002
• Description: Toner motor C error
  A state in which the lock signal is detected for 20 times has been detected 3 times during the toner motor C is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective screw sensor C.
  Defective toner motor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner motor C and engine PWB (YC27)
  Defective toner motor C. Replace the toner motor C.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7003
• Description: Toner motor M error
  A state in which the lock signal is detected for 20 times has been detected 3 times during the toner motor M is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective screw sensor M.
  Defective toner motor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner motor M and engine PWB (YC27)
  Defective toner motor M. Replace the toner motor M.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7004
• Description: Toner motor Y error A state in which the lock signal is detected for 20 times has been detected 3 times during the toner motor Y is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective screw sensor Y.
  Defective toner motor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner motor Y and engine PWB (YC27)
  Defective toner motor Y. Replace the toner motor Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7101
• Description: Toner sensor K error
  Sensor output value of 60 or less or 944 or more continued for 3 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner sensor K and front PWB (YC9) Front PWB (YC2) and engine PWB (YC10)
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7102
• Description: Toner sensor C error
  Sensor output value of 60 or less or 944 or more continued for 3 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner sensor C and front PWB (YC13) Front PWB (YC2) and engine PWB (YC10)
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7103
• Description: Toner sensor M error
  Sensor output value of 60 or less or 944 or more continued for 3 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner sensor M and front PWB (YC11) Front PWB (YC2) and engine PWB (YC10)
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7104
• Description: Toner sensor Y error
  Sensor output value of 60 or less or 944 or more continued for 3 s.
• Causes: Defective connector cable or poor contact in the connector
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner sensor Y and front PWB (YC15) Front PWB (YC2) and engine PWB (YC10)
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7200
• Description: Broken outer temperature sensor 2 wire The sensor input sampling is greater than 230.
• Causes: Defective connector cable or poor contact in the connector.
  Defective outer temperature sensor 2.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Outer temperature sensor 2 and front PWB (YC19) Front PWB (YC2) and engine PWB (YC10)
  Defective outer temperature sensor 2. Replace outer temperature sensor 2.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7210
• Description: Short-circuited outer temperature sensor 2
  The sensor input sampling is less than 69.
• Causes: Defective connector cable or poor contact in the connector.
  Defective outer temperature sensor 2.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Outer temperature sensor 2 and front PWB (YC19) Front PWB (YC2) and engine PWB (YC10)
  Defective outer temperature sensor 2. Replace outer temperature sensor 2.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7221
• Description: Broken LSU thermistor K wire
  The sensor input sampling is greater than 230.
• Causes: Defective connector cable or poor contact in the connector
  Defective LSU thermistor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC5) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective LSU thermistor K. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7222
• Description: Broken LSU thermistor C wire
  The sensor input sampling is greater than 230.
• Causes: Defective connector cable or poor contact in the connector.
  Defective LSU thermistor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC10) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective LSU thermistor C. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7223
• Description: Broken LSU thermistor M wire
  The sensor input sampling is greater than 230.
• Causes: Defective connector cable or poor contact in the connector.
  Defective LSU thermistor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC8) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective LSU thermistor M. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7224
• Description: Broken LSU thermistor Y wire
  The sensor input sampling is greater than 230.
• Causes: Defective connector cable or poor contact in the connector.
  Defective LSU thermistor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC12) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective LSU thermistor Y. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7231
• Description: Short-circuited LSU thermistor K
  The sensor input sampling is less than 69.
• Causes: Defective connector cable or poor contact in the connector.
  Defective LSU thermistor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC5) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective LSU thermistor K. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7232
• Description: Short-circuited LSU thermistor C
  The sensor input sampling is less than 69.
• Causes: Defective connector cable or poor contact in the connector.
  Defective LSU thermistor C
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC10) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective LSU thermistor C. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7233
• Description: Short-circuited LSU thermistor M The sensor input sampling is less than 69.
• Causes: Defective connector cable or poor contact in the connector.
  Defective LSU thermistor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC8) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective LSU thermistor M. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7234
• Description: Short-circuited LSU thermistor Y
  The sensor input sampling is less than 69.
• Causes: Defective connector cable or poor contact in the connector.
  Defective LSU thermistor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit and LSU relay PWB (YC12) LSU relay PWB (YC3) and engine PWB (YC12)
  Defective LSU thermistor Y. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7241
• Description: Broken developer thermistor K wire
  The sensor input sampling is greater than 230.
• Causes: Defective connector cable or poor contact in the connector.
  Defective developer thermistor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit K and front PWB (YC9) Front PWB (YC2) and engine PWB (YC10)
  Defective developer thermistor K. Replace developer unit K.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7242
• Description: Broken developer thermistor C wire
  The sensor input sampling is greater than 230.
• Causes: Defective connector cable or poor contact in the connector
  Defective developer thermistor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit C and front PWB (YC13) Front PWB (YC2) and engine PWB (YC10)
  Defective developer thermistor C. Replace developer unit C.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7243
• Description: Broken developer thermistor M wire
  The sensor input sampling is greater than 230.
• Causes: Defective connector cable or poor contact in the connector.
  Defective developer thermistor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit M and front PWB (YC11) Front PWB (YC2) and engine PWB (YC10)
  Defective developer thermistor M. Replace developer unit M.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7244
• Description: Broken developer thermistor Y wire
  The sensor input sampling is greater than 230.
• Causes: Defective connector cable or poor contact in the connector.
  Defective developer thermistor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit Y and front PWB (YC15) Front PWB (YC2) and engine PWB (YC10)
  Defective developer thermistor Y. Replace developer unit Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7251
• Description: Short-circuited developer thermistor K
  The sensor input sampling is less than 69.
• Causes: Defective connector cable or poor contact in the connector.
  Defective developer thermistor K.
  Defective engine PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit K and front PWB (YC9) Front PWB (YC2) and engine PWB (YC10)
  Defective developer thermistor K. Replace developer unit K.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7252
• Description: Short-circuited developer thermistor C
  The sensor input sampling is less than 69.
• Causes: Defective connector cable or poor contact in the connector
  Defective developer thermistor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit C and front PWB (YC13) Front PWB (YC2) and engine PWB (YC10)
  Defective developer thermistor C. Replace developer unit C.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7253
• Description: Short-circuited developer thermistor M
  The sensor input sampling is less than 69.
• Causes: Defective connector cable or poor contact in the connector
  Defective developer thermistor M.
  Defective engine PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit M and front PWB (YC11) Front PWB (YC2) and engine PWB (YC10)
  Defective developer thermistor M. Replace developer unit M.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7254
• Description: Short-circuited developer thermistor Y wire
  The sensor input sampling is less than 69.
• Causes: Defective connector cable or poor contact in the connector.
  Defective developer thermistor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit Y and front PWB (YC15) Front PWB (YC2) and engine PWB (YC10)
  Defective developer thermistor Y. Replace developer unit Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7301
• Description: Toner hopper motor K error
  When the toner hopper motor K is driven, toner hopper sensor K does not turn on within 200 ms. This error is detected 15 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor
  Defective toner hopper sensor K.
  Defective toner hopper motor K.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner hopper motor K and retainer PWB (YC4) Retainer PWB (YC3) and front PWB (YC6) Front PWB (YC3) and engine PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective toner hopper sensor K. Replace the toner hopper sensor K.
  Defective toner hopper motor K. Replace the toner hopper motor K.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7302
• Description: Toner hopper motor C error
  When the toner hopper motor C is driven, toner hopper sensor C does not turn on within 200 ms. This error is detected 15 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor
  Defective toner hopper sensor C.
  Defective toner hopper motor C.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner hopper motor C and retainer PWB (YC4) Retainer PWB (YC3) and front PWB (YC6) Front PWB (YC3) and engine PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective toner hopper sensor C. Replace the toner hopper sensor C.
  Defective toner hopper motor C. Replace the toner hopper motor C.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7303
• Description: Toner hopper motor M error
  When the toner hopper motor M is driven, toner hopper sensor M does not turn on within 200 ms. This error is detected 15 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective toner hopper sensor M.
  Defective toner hopper motor M.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner hopper motor M and retainer PWB (YC4) Retainer PWB (YC3) and front PWB (YC6) Front PWB (YC3) and engine PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective toner hopper sensor M. Replace the toner hopper sensor M.
  Defective toner hopper motor M. Replace the toner hopper motor M.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7304
• Description: Toner hopper motor Y error
  When the toner hopper motor Y is driven, toner hopper sensor Y does not turn on within 200 ms. This error is detected 15 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective toner hopper sensor Y.
  Defective toner hopper motor Y.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner hopper motor Y and retainer PWB (YC4) Retainer PWB (YC3) and front PWB (YC6) Front PWB (YC3) and engine PWB (YC7)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective toner hopper sensor Y. Replace the toner hopper sensor Y.
  Defective toner hopper motor Y. Replace the toner hopper motor Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7401
• Description: Developer unit K type mismatch error
  Absence of the developer unit K is detected.
• Causes: Defective connector cable or poor contact in the connector.
  Different type of the developer unit is installed.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit K and front PWB (YC9) Front PWB (YC2) and engine PWB (YC10)
  Different type of the developer unit is installed. Install the correct developer unit.

• Code: 7402
• Description: Developer unit C type mismatch error
  Absence of the developer unit C is detected.
• Causes: Defective connector cable or poor contact in the connector.
  Different type of the developer unit is installed.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit C and front PWB (YC13) Front PWB (YC2) and engine PWB (YC10)
  Different type of the developer unit is installed. Install the correct developer unit.

• Code: 7403
• Description: Developer unit M type mismatch error
  Absence of the developer unit M is detected.
• Causes: Defective connector cable or poor contact in the connector
  Different type of the developer unit is installed
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit M and front PWB (YC11) Front PWB (YC2) and engine PWB (YC10)
  Different type of the developer unit is installed. Install the correct developer unit.

• Code: 7404
• Description: Developer unit Y type mismatch error
  Absence of the developer unit Y is detected.
• Causes: Defective connector cable or poor contact in the connector.
  Different type of the developer unit is installed.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit Y and front PWB (YC15) Front PWB (YC2) and engine PWB (YC10)
  Different type of the developer unit is installed. Install the correct developer unit.

• Code: 7460
• Description: Developer shutter error
  Power is turned on while the developer shutter is locked.
• Causes: The developer shutter has been locked.
  Defective connector cable or poor contact in the connector.
• Remedy: The developer shutter has been locked. Release the developer shutter.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer shutter sensor and front PWB (YC5) Front PWB (YC3) and engine PWB (YC7)

• Code: 7601
• Description: ID sensor 1 error
  An abnormal value is detected in the input data to ID sensor 1.
• Causes: Defective connector cable or poor contact in the connector
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. ID sensor 1 and feed PWB 1 (YC10) Feed PWB 1 (YC1) and engine PWB (YC6)
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7602
• Description: ID sensor 2 error
  An abnormal value is detected in the input data to ID sensor 2.
• Causes: Defective connector cable or poor contact in the connector.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. ID sensor 2 and feed PWB 1 (YC10) Feed PWB 1 (YC1) and engine PWB (YC6)
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7800
• Description: Broken outer temperature sensor 1 wire
  The sensor input sampling is greater than 255.
• Causes: Defective connector cable or poor contact in the connector.
  Defective outer temperature sensor 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Outer temperature sensor and front PWB (YC16) Front PWB (YC2) and engine PWB (YC10)
  Defective outer temperature sensor. Replace outer temperature sensor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7810
• Description: Short-circuited outer temperature sensor 1
  The sensor input sampling is less than 0.
• Causes: Defective connector cable or poor contact in the connector.
  Defective outer temperature sensor 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Outer temperature sensor and front PWB (YC16) Front PWB (YC2) and engine PWB (YC10)
  Defective outer temperature sensor. Replace outer temperature sensor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7901
• Description: Drum K EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drum PWB K.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum PWB K and front PWB (YC7) Front PWB (YC2) and engine PWB (YC10)
  Defective drum PWB K. Replace the drum unit K.

• Code: 7902
• Description: Drum C EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drum PWB C.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum PWB C and front PWB (YC12) Front PWB (YC2) and engine PWB (YC10)
  Defective drum PWB C. Replace the drum unit C.

• Code: 7903
• Description: Drum M EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drum PWB M.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum PWB M and front PWB (YC10) Front PWB (YC2) and engine PWB (YC10)
  Defective drum PWB M. Replace the drum unit M.

• Code: 7904
• Description: Drum Y EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drum PWB Y.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum PWB Y and front PWB (YC14) Front PWB (YC2) and engine PWB (YC10)
  Defective drum PWB Y. Replace the drum unit Y.

• Code: 7911
• Description: Developer unit K EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective developer unit K.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit K and front PWB (YC9) Front PWB (YC2) and engine PWB (YC10)
  Defective developer unit K. Replace the developer unit K.

• Code: 7912
• Description: Developer unit C EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective developer unit C.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit C and front PWB (YC13) Front PWB (YC2) and engine PWB (YC10)
  Defective developer unit C. Replace the developer unit C.

• Code: 7913
• Description: Developer unit M EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective developer unit M.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit M and front PWB (YC11) Front PWB (YC2) and engine PWB (YC10)
  Defective developer unit M. Replace the developer unit M.

• Code: 7914
• Description: Developer unit Y EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective developer unit Y.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit Y and front PWB (YC15) Front PWB (YC2) and engine PWB (YC10)
  Defective developer unit Y. Replace the developer unit Y.

• Code: 7941
• Description: Laser scanner unit K EEPROM error
  Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective APC PWB K.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. APC PWB K and LSU relay PWB (YC5) LSU relay PWB (YC2) and engine PWB (YC11)
  Defective APC PWB K. Replace the laser scanner unit.

• Code: 7942
• Description: Laser scanner unit C EEPROM error
  Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective APC PWB C.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. APC PWB C and LSU relay PWB (YC10) LSU relay PWB (YC2) and engine PWB (YC11)
  Defective APC PWB C. Replace the laser scanner unit.

• Code: 7943
• Description: Laser scanner unit M EEPROM error
  Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective APC PWB M.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. APC PWB M and LSU relay PWB (YC8) LSU relay PWB (YC2) and engine PWB (YC11)
  Defective APC PWB M. Replace the laser scanner unit.

• Code: 7944
• Description: Laser scanner unit Y EEPROM error
  Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective APC PWB Y.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. APC PWB Y and LSU relay PWB (YC12) LSU relay PWB (YC2) and engine PWB (YC11)
  Defective APC PWB Y. Replace the laser scanner unit.

• Code: 8000
• Description: Finisher incompatible detection error
  The finisher has been installed with a device to which it is incompatible.
• Causes: The finisher is installed with a device to which it is incompatible.
• Remedy: The finisher must be installed with the devices to which it is compatible.

• Code: 8010
• Description: Punch motor error 1
  When the punch motor is driven, punch home position sensor does not turn on within 200 ms.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective punch home position sensor.
  Defective punch motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Punch motor and punch PWB (YC4) Punch home position sensor and punch PWB (YC8) Punch PWB (YC1) and DF main PWB (YC7)
  Defective punch home position sensor. Replace the punch home position sensor.
  Defective punch motor. Replace the punch motor.
  Defective PWB. Replace the punch PWB or DF main PWB and check for correct operation.

• Code: 8020
• Description: Punch motor error 2
  Home position is not obtained in 3 seconds after home position is initialized or in standby.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective punch motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Punch motor and punch PWB (YC4) Punch PWB (YC1) and DF main PWB (YC7)
  Defective punch motor. Replace the punch motor.
  Defective PWB. Replace the punch PWB or DF main PWB and check for correct operation.

• Code: 8030
• Description: Punch motor error 3
  Home position does not turn from On to Off in 50 ms after home position has been initialized.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective punch motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Punch motor and punch PWB (YC4) Punch PWB (YC1) and DF main PWB (YC7
  Defective punch motor. Replace the punch motor.
  Defective PWB. Replace the punch PWB or DF main PWB and check for correct operation.

• Code: 8090
• Description: DF paddle motor error
  When the DF paddle motor is driven, DF paddle sensor does not turn on within 1 s.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF paddle sensor
  Defective DF paddle motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF paddle motor and DF main PWB (YC15) DF paddle sensor and DF main PWB (YC22)
  Defective DF paddle sensor. Replace the DF paddle sensor.
  Defective DF paddle motor. Replace the DF paddle motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8100
• Description: DF eject release motor error
  When the DF eject release motor is driven, DF bundle discharge sensor does not turn on within 1 s.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF bundle discharge sensor.
  Defective DF eject release motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF eject release motor and DF main PWB (YC12) DF bundle discharge sensor and DF main PWB (YC22)
  Defective DF bundle discharge sensor. Replace the DF bundle discharge sensor.
  Defective DF eject release motor. Replace the DF eject release motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8110
• Description: DF shift motor 1 error
  When the DF shift motor 1 is driven, DF shift sensor 1 does not turn on within 160 ms.
• Causes: Defective connector cable or poor contact in the connector
  Defective DF shift sensor 1.
  Defective DF shift motor 1.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF shift motor 1 and DF main PWB (YC14) DF shift sensor 1 and DF main PWB (YC23)
  Defective DF shift sensor 1. Replace the DF shift sensor 1.
  Defective DF shift motor 1. Replace the DF shift motor 1.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8120
• Description: DF shift motor 2 error
  When the DF shift motor 2 is driven, DF shift sensor 2 does not turn on within 160 ms.
• Causes: Defective connector cable or poor contact in the connector.
  Defective DF shift sensor 2.
  Defective DF shift motor 2.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF shift motor 2 and DF main PWB (YC14) DF shift sensor 2 and DF main PWB (YC23)
  Defective DF shift sensor 2. Replace the DF shift sensor 2.
  Defective DF shift motor 2. Replace the DF shift motor 2.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8130
• Description: DF shift release motor error When the DF shift release motor is driven, DF shift release sensor does not turn on within 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective DF shift release sensor.
  Defective DF shift release motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF shift release motor and DF main PWB (YC14) DF shift release sensor and DF main PWB (YC23)
  Defective DF shift release sensor. Replace the DF shift release sensor.
  Defective DF shift release motor. Replace the DF shift release motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8140
• Description: DF tray motor error 1
  When the main tray has started ascending, DF tray sensor 1 or DF tray upper surface sensor does not turn on within 20 s.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective sensor.
  Defective DF tray motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF tray motor and DF main PWB (YC16) DF tray sensor 1 and DF main PWB (YC22) DF tray upper surface sensor and DF main PWB (YC21, YC13)
  Defective sensor. Replace DF tray sensor 1 or DF tray upper surface sensor.
  Defective DF tray motor. Replace the DF tray motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8150
• Description: DF tray motor error 2
  When the main tray has descended, DF tray sensor 1 or DF tray upper surface sensor does not turn off within 5s.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective sensor.
  Defective DF tray motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF tray motor and DF main PWB (YC16) DF tray sensor 1 and DF main PWB (YC22) DF tray upper surface sensor and DF main PWB (YC21, YC13)
  Defective sensor. Replace DF tray sensor 1 or DF tray upper surface sensor.
  Defective DF tray motor. Replace the DF tray motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8160
• Description: DF tray motor error 3
  When the main tray has descended, DF tray sensor 3 does not turn on within 20 s.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF tray sensor 3.
  Defective DF tray motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF tray motor and DF main PWB (YC16) DF tray sensor 3 and DF main PWB (YC23)
  Defective DF tray sensor 3. Replace DF tray sensor 3.
  Defective DF tray motor. Replace the DF tray motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8170
• Description: DF side registration motor 1 error 1
  When initial operation, DF side registration sensor 1 does not turn on within 3 s.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF side registration sensor 1.
  Defective DF side registration motor 1.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF side registration motor 1 and DF main PWB (YC15) DF side registration sensor 1 and DF main PWB (YC22)
  Defective DF side registration sensor 1. Replace DF side registration sensor 1.
  Defective DF side registration motor 1. Replace DF side registration motor 1.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8180
• Description: DF side registration motor 1 error 2
  JAM6810 is detected twice.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF side registration sensor 1.
  Defective DF side registration motor 1.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF side registration motor 1 and DF main PWB (YC15) DF side registration sensor 1 and DF main PWB (YC22)
  Defective DF side registration sensor 1. Replace DF side registration sensor 1.
  Defective DF side registration motor 1. Replace DF side registration motor 1.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8190
• Description: DF side registration motor 2 error 1
  When initial operation, DF side registration sensor 2 does not turn on within 3 s.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF side registration sensor 2.
  Defective DF side registration motor 2.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF side registration motor 2 and DF main PWB (YC15) DF side registration sensor 2 and DF main PWB (YC22)
  Defective DF side registration sensor 2. Replace DF side registration sensor 2.
  Defective DF side registration motor 2. Replace DF side registration motor 2.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8200
• Description: DF side registration motor 2 error 2
  JAM6910 is detected twice.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF side registration sensor 2.
  Defective DF side registration motor 2.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF side registration motor 2 and DF main PWB (YC15) DF side registration sensor 2 and DF main PWB (YC22)
  Defective DF side registration sensor 2. Replace DF side registration sensor 2.
  Defective DF side registration motor 2. Replace DF side registration motor 2.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8210
• Description: DF slide motor error
  When initial operation, DF staple sensor does not turn on within 3 s.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF staple sensor.
  Defective DF slide motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF slide motor and DF main PWB (YC12) DF staple sensor and DF main PWB (YC22)
  Defective DF staple sensor. Replace the DF staple sensor.
  Defective DF slide motor. Replace the DF slide motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8230
• Description: DF staple motor error 1
  JAM7000 is detected twice.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF staple sensor.
  Defective DF staple motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Staple unit and DF main PWB (YC17)
  Defective DF staple sensor. Defective DF staple motor. Replace the staple unit.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8240
• Description: DF staple motor error 2
  The lock signal of the motor is detected continuously for 500 ms.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF staple motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Staple unit and DF main PWB (YC17)
  Defective DF staple motor. Replace the staple unit.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8250
• Description: DF tray motor error 4
  The lock signal of the motor is detected continuously for 500 ms.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective DF tray motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF tray motor and DF main PWB (YC16) DF tray sensor 3 and DF main PWB (YC23)
  Defective DF tray motor. Replace the DF tray motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8300
• Description: Center-folding unit communication error
  Communication with the center-folding unit is not possible.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF set sensor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CF main PWB (YC7) and DF main PWB (YC9)
  Defective CF set sensor. Replace the CF set sensor.
  Defective PWB. Replace the CF main PWB or the DF main PWB and check for correct operation.

• Code: 8310
• Description: CF side registration motor 2 error
  When initial operation, CF side registration sensor 2 does not turn on within 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF side registration sensor 2.
  Defective CF side registration motor 2.
  Defective CF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CF side registration motor 2 and CF main PWB (YC10) CF side registration sensor 2 and CF main PWB (YC20)
  Defective CF side registration sensor 2. Replace CF side registration sensor 2.
  Defective CF side registration motor 2. Replace CF side registration motor 2.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8320
• Description: CF adjustment motor error
  When initial operation, CF adjustment sensor does not turn on within 2.5 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF adjustment sensor 1, 2.
  Defective CF adjustment motor 1, 2.
  Defective CF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CF adjustment motor 1, 2 and CF main PWB (YC10) CF adjustment sensor 1, 2 and CF main PWB (YC20)
  Defective CF adjustment sensor 1, 2. Replace CF adjustment sensor 1, 2.
  Defective CF adjustment motor 1, 2. Replace CF adjustment motor 1, 2.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8330
• Description: CF blade motor error
  When initial operation, CF blade sensor does not turn on within 1.5 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF blade sensor.
  Defective CF blade motor.
  Defective CF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CF blade motor and CF main PWB (YC15) CF blade sensor and CF main PWB (YC20)
  Defective CF blade sensor. Replace the CF blade sensor.
  Defective CF blade motor. Replace the CF blade motor.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8340
• Description: CF staple motor error 1
  JAM7600 is detected twice.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF staple sensor.
  Defective CF staple motor.
  Defective CF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CF staple unit and CF main PWB (YC13)
  Defective CF staple sensor. Defective CF staple motor. Replace the CF staple unit.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8350
• Description: CF side registration motor 1 error
  When initial operation, CF side registration sensor 1 does not turn on within 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF side registration sensor 1.
  Defective CF side registration motor 1.
  Defective CF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CF side registration motor 1 and CF main PWB (YC10) CF side registration sensor 1 and CF main PWB (YC20)
  Defective CF side registration sensor 1. Replace CF side registration sensor 1.
  Defective CF side registration motor 1. Replace CF side registration motor 1.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8360
• Description: CF main motor error
  During driving the motor, lock signal is detected for 1 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF main motor
  Defective CF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CF main motor and CF main PWB (YC16)
  Defective CF main motor. Replace the CF main motor.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8370
• Description: CF staple motor error 2
  The lock signal of the motor is detected continuously for 500 ms.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF staple motor.
  Defective CF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CF staple unit and CF main PWB (YC13)
  Defective CF staple motor. Replace the CF staple unit.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8410
• Description: Punch slide motor error 1
  The punch slide sensor won’t turn On when home position has been moved by 30 mm.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective slide sensor.
  Defective punch slide motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Punch slide motor and punch PWB (YC3) Punch slide sensor and punch PWB (YC6) Punch PWB (YC1) and DF main PWB (YC7)
  Defective slide sensor. Replace the punch slide sensor.
  Defective punch slide motor. Replace the punch slide motor.
  Defective PWB. Replace the punch PWB or DF main PWB and check for correct operation.

• Code: 8420
• Description: Punch slide motor error 2
  In detection of paper edges, the paper edge cannot be detected in 30 mm move.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective punch slide motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Punch slide motor and punch PWB (YC3) Punch PWB (YC1) and DF main PWB (YC7)
  Defective punch slide motor. Replace the punch slide motor.
  Defective PWB. Replace the punch PWB or DF main PWB and check for correct operation.

• Code: 8430
• Description: Punch unit communication error
  Communication with the punch unit is not possible.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Punch PWB (YC1) and DF main PWB (YC7)
  Defective PWB. Replace the punch PWB or the DF main PWB and check for correct operation.

• Code: 8500
• Description: Mailbox communication error
  Communication with the mailbox is not possible.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. MB main PWB (YC3) and DF main PWB (YC6)
  Defective PWB. Replace the MB main PWB or the DF main PWB and check for correct operation.

• Code: 8510
• Description: MB conveying motor error 1
  When initial operation, MB home position sensor does not turn on within 5 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective MB home position sensor.
  Defective MB conveying motor.
  Defective MB main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. MB conveying motor and MB main PWB (YC5) MB home position sensor and MB main PWB (YC2)
  Defective MB home position sensor. Replace the MB home position sensor.
  Defective MB conveying motor. Replace the MB conveying motor.
  Defective MB main PWB. Replace the MB main PWB and check for correct operation.

• Code: 8520
• Description: MB conveying motor error 2
  When standby operation, MB home position sensor does not turn off within 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective MB home position sensor.
  Defective MB conveying motor.
  Defective MB main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. MB conveying motor and MB main PWB (YC5) MB home position sensor and MB main PWB (YC2)
  Defective MB home position sensor. Replace the MB home position sensor.
  Defective MB conveying motor. Replace the MB conveying motor.
  Defective MB main PWB. Replace the MB main PWB and check for correct operation.

• Code: 8800
• Description: Document finisher communication error
  Communication with the document finisher is not possible.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF main PWB (YC4) and engine PWB (YC18)
  Defective PWB. Replace the DF main PWB or the engine PWB and check for correct operation.

• Code: 8900
• Description: Document finisher backup error
  Read and write data does not match 3 times in succession.
• Causes: Defective connector cable or poor contact in the connector (4000-sheet finisher).
  Defective connector cable or poor contact in the connector (1000-sheet finisher).
  Improper installation EEPROM.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DF main PWB (YC4) and engine PWB (YC18)
  Improper installation EEPROM. Check the installation of the EEPROM and remedy if necessary.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8930
• Description: Center-folding unit backup error
  Read and write data does not match 3 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Improper installation EEPROM
  Defective CF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CF main PWB (YC7) and DF main PWB (YC9)
  Improper installation EEPROM. Check the installation of the EEPROM and remedy if necessary.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 9000
• Description: Document processor communication error
  Communication with the document processor is not possible.
• Causes: Defective connector cable or poor contact in the connector
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DP main PWB (YC1) and ISC PWB (YC12) ISC PWB (YC3) and main PWB (YC11)
  Defective PWB. Replace the DP main PWB or the ISC PWB and check for correct operation.

• Code: 9010
• Description: Coin vender communication error
  A communication error from coin vender is detected 10 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Data setup failure.
  Defective coin vender control PWB.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable.
  Data setup failure. Set maintenance mode U206 to off when a coin vender is not installed.
  Defective coin vender control PWB. Replace the coin vender control PWB.
  Defective PWB. Replace the main PWB and check for correct operation.

• Code: 9040
• Description: DP lift motor going up error
  When the DP lift motor is driven, DP lift sensor 1 does not turn on within 2 s.
• Causes: Defective connector cable or poor contact in the connector
  Defective DP lift sensor 1.
  Defective DP lift motor.
  Defective DP main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DP lift motor and DP main PWB (YC5) DP lift sensor 1 and DP main PWB (YC4)
  Defective DP lift sensor 1. Replace the DP lift sensor 1.
  Defective DP lift motor. Replace the DP lift motor.
  Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: 9050
• Description: DP lift motor going down error
  When the DP lift motor is driven, DP lift sensor 2 does not turn on within 2 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective DP lift sensor 2.
  Defective DP lift motor.
  Defective DP main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DP lift motor and DP main PWB (YC5) DP lift sensor 2 and DP main PWB (YC2)
  Defective DP lift sensor 2. Replace the DP lift sensor 2.
  Defective DP lift motor. Replace the DP lift motor.
  Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: 9060
• Description: DP EEPROM error
  Mismatch of reading data from two locations occurs 3 times successively. Mismatch between writing data and reading data occurs 3 times successively.
• Causes: Defective DP main PWB.
  Device damage of EEPROM.
• Remedy: Defective DP main PWB. Replace the DP main PWB and check for correct operation.
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: 9070
• Description: Communication error between DP and SHD
  A communication error is detected.
• Causes: Defective connector cable or poor contact in the connector.
  Defective DPSHD PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DPSHD PWB (YC1) and DP main PWB (YC10)
  Defective DPSHD PWB. Replace the DPSHD PWB and check for correct operation.

• Code: 9080
• Description: LED fault detection
  When the power supply is turned on, the peak value of LED is 80hex or less.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CIS.
  Defective DPSHD PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CIS and DPSHD PWB (YC1) DPSHD PWB (YC1) and DP main PWB (YC10)
  Defective CIS. Replace CIS and check for correct operation.
  Defective DPSHD PWB. Replace the DPSHD PWB and check for correct operation.

• Code: 9100
• Description: Coin vender control PWB error
  Communication error has been detected at the coin mec of the coin vender control PWB.
• Causes: Defective coin vender control PWB.
• Remedy: Replace the coin mec.

• Code: 9110
• Description: Coin vender error
  Communication error has been detected in connection with the coin mec and the rejector.
• Causes: Rejector installed incorrectly.
  Defective rejector.
• Remedy: Rejector installed incorrectly. Check the rejector is properly installed and, if not, perform the corrective action.
  Defective rejector. Replace the rejector.

• Code: 9120
• Description: Sensor error in coin vender change (Yen 10)
  Change is empty despite change is enough.
• Causes: Coin jam in the change tube
  Poor contact in the connector.
  Defective change empty sensor.
  Defective coin vender control PWB.
• Remedy: Coin jam in the change tube Check visually and remedy.
  Poor contact in the connector. Check if the change empty sensor is intact.
  Defective change empty sensor. Replace the coin mec.
  Defective coin vender control PWB. Replace the coin mec.

• Code: 9130
• Description: Sensor error in coin vender change (Yen 50)
  Change is empty despite change is enough.
• Causes: Coin jam in the change tube
  Poor contact in the connector.
  Defective change empty sensor.
  Defective coin vender control PWB
• Remedy: Coin jam in the change tube Check visually and remedy.
  Poor contact in the connector. Check if the change empty sensor is intact.
  Defective change empty sensor. Replace the coin mec.
  Defective coin vender control PWB. Replace the coin mec.

• Code: 9140
• Description: Sensor error in coin vender change (Yen 100)
  Change is empty despite change is enough.
• Causes: Coin jam in the change tube
  Poor contact in the connector.
  Defective change empty sensor.
  Defective coin vender control PWB.
• Remedy: Coin jam in the change tube Check visually and remedy.
  Poor contact in the connector. Check if the change empty sensor is intact.
  Defective change empty sensor. Replace the coin mec.
  Defective coin vender control PWB. Replace the coin mec.

• Code: 9150
• Description: Sensor error in coin vender change (Yen 500)
  Change is empty despite change is enough.
• Causes: Coin jam in the change tube
  Poor contact in the connector.
  Defective change empty sensor.
  Defective coin vender control PWB.
• Remedy: Coin jam in the change tube Check visually and remedy.
  Poor contact in the connector. Check if the change empty sensor is intact.
  Defective change empty sensor. Replace the coin mec.
  Defective coin vender control PWB. Replace the coin mec.

• Code: 9160
• Description: Coin vender pay-out error
  Coin is paid out despite the pay-out motor is determined not active.
• Causes: Defective pay-out motor.
• Remedy: Replace the coin mec.

• Code: 9170
• Description: Coin vender pay-out sensor error
  Coin is paid out despite the pay-out motor is determined not active.
• Causes: Change jam at the pay-out.
  Defective pay-out motor.
  Defective pay-out sensor.
• Remedy: Change jam at the pay-out. Check visually and remedy.
  Defective pay-out motor. Replace the coin mec.
  Defective pay-out sensor. Replace the coin mec.

• Code: 9200
• Description: DP multi feed sensor communication error
  A communication error is detected 3 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DP main PWB (YC1) and ISC PWB (YC12) ISC PWB (YC3) and main PWB (YC11)
  Defective PWB. Replace the DP main PWB or the ISC PWB and check for correct operation.

• Code: 9210
• Description: DP multi feed sensor error
  The DP multi feed sensor has signaled the presence of paper for 10 ms continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective DP multi feed sensor.
  Defective DP main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DP multi feed sensor and DP main PWB (YC11)
  Defective DP multi feed sensor. Replace the DP multi feed sensor.
  Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: 9220
• Description: DP multi feed sensor backup error
  When writing the data, read and write data does not match 3 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective DP multi feed sensor.
  Defective DP main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DP multi feed sensor and DP main PWB (YC11)
  Defective DP multi feed sensor. Replace the DP multi feed sensor.
  Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: 9500 … 9550
• Description: Contact the Service Administrative Division.
• Causes:
• Remedy: Contact the Service Administrative Division.

• Code: F000
• Description: Communication error between main PWB and operation PWB
• Causes: Defective main PWB.
  Defective operation PWB.
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.
  Defective operation PWB. Replace the operation PWB and check for correct operation.

• Code: F010
• Description: Main PWB checksum error
• Causes: Defective main PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.

• Code: F040
• Description: Communication error between main PWB and print engine
• Causes: Defective main PWB.
  Defective engine PWB.
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: F041
• Description: Communication error between main PWB and scanner engine
• Causes: Defective main PWB.
  Defective ISC PWB.
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.
  Defective ISC PWB. Replace the ISC PWB and check for correct operation.

• Code: F050
• Description: Print engine ROM checksum error
• Causes: Defective engine PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace engine PWB.

• Code: F051
• Description: Scanner engine ROM checksum error
• Causes: Defective ISC PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace ISC PWB.

• Code: F278
• Description: Power supply in drive system error
• Causes: Main power switch was turned off without using the power key, or a power failure has occurred.
• Remedy: Turn on power. (To switch off power, first press the power key until the main power indicator goes off, then turn the main power switch off.)

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An Error Has Occurred!

Время на прочтение
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Количество просмотров 9.3K

Даже если у вас большой опыт работы с Apache Kafka, время от времени наверняка случается зайти в тупик. Например, когда вы конфигурируете и изучаете клиенты или настраиваете и отслеживаете брокеры. Попробуй за всем уследить, когда в конвейере Kafka столько компонентов. В этой статье описано пять частых ошибок и советы по тому, как их избежать на всех этапах — от конфигурирования клиентов и брокеров до планирования  и мониторинга. Эти рекомендации сэкономят вам время и силы.

Какие ошибки мы совершаем

Со стороны клиента:

1. Устанавливаем слишком маленькое значение request.timeout.ms.
2. Неправильно понимаем повторные попытки продюсера и исключения, допускающие повторные попытки.

Со стороны брокера:

3. Не отслеживаем ключевые метрики брокера.
4. Создаём слишком много партиций.
5. Устанавливаем слишком маленькое значение segment.ms.

Сначала рассмотрим типичные ошибки на стороне клиента.

1. Устанавливаем слишком маленькое значение request.timeout.ms

request.timeout.ms — это конфигурация на стороне клиента, которая определяет, как долго клиент (продюсер и консьюмер) будет ждать ответа от брокера. По умолчанию — 30 секунд.

Если за это время ответ не пришёл, случится одно из двух: клиент снова отправит запрос (если повторные попытки включены и не закончились, см. ниже) или произойдёт сбой.

Иногда возникает искушение установить очень маленькое значение для request.timeout.ms, чтобы клиенты реагировали быстрее, даже если речь о сбое. На самом деле, это не лучшая идея. Тут нужно действовать очень осторожно, иначе можно только усугубить проблемы на стороне брокера и ухудшить производительность приложения.

Например, если брокер медленно обрабатывает входящие запросы и мы установим маленькое значение request.timeout.ms, нагрузка на брокер только возрастёт из-за повторных попыток в очереди. Производительность и без того была невысокой, а сейчас совсем упадёт.

Лучше оставить для request.timeout.ms 30 секунд, как по умолчанию. Если уменьшить это значение, по факту время обработки запросов на стороне сервера может только возрасти. Если таймауты возникают часто, может быть, стоит даже наоборот увеличить request.timeout.ms.

2. Неправильно понимаем повторные попытки продюсера и исключения, допускающие повторные попытки.

Мы надеемся, что при выполнении producer.send() записи успешно сохранятся в топике. В реальности по той или иной причине может произойти сбой запроса. Иногда этот сбой временный, пройдёт сам и можно делать повторные попытки, а иногда постоянный и нужно что-то исправить, прежде чем отправлять запросы снова.

Например, при постепенном обновлении кластера могут возникать исключения, которые пройдут сами:

• UNKNOWN_TOPIC_OR_PARTITION

• LEADER_NOT_AVAILABLE

• NOT_LEADER_FOR_PARTITION

• NOT_ENOUGH_REPLICAS

• NOT_ENOUGH_REPLICAS_AFTER_APPEND

Если не настроить повторные попытки правильно, все эти исключения будут считаться ошибками и могут привести к нарушению работы и потере сообщений.

Существует несколько конфигураций продюсера, связанных с повторными попытками:

• retries. Как видно по названию, это количество повторных попыток. Значение по умолчанию для продюсера — INT_MAX, самое большое целое значение в вашем языке, но можно установить любое число от 0 до INT_MAX. Значение может быть очень большим, но это вовсе не значит, что клиент будет пытаться до бесконечности. На самом деле повторные попытки будут ограничены значением delivery.timeout.ms.

• delivery.timeout.ms и linger.ms. Продюсеры могут записывать сообщения в одну партицию пакетами, чтобы оптимизировать этот процесс. Значение linger.ms показывает, сколько времени продюсер будет медлить (linger) в ожидании сообщений для пакета. delivery.timeout.ms — это максимальное время, за которое продюсер должен доставить запись (по умолчанию — две минуты). Оно не должно быть меньше, чем linger.ms плюс request.timeout.ms.

• retry.backoff.ms. При повторной попытке продюсер подождёт, прежде чем отправить запрос повторно. Если задать для этого параметра слишком маленькое значение, временное исключение не успеет устраниться и произойдёт сбой.

• request.timeout.ms. Мы уже объясняли, почему лучше оставить для request.timeout.ms 30 секунд, как по умолчанию.

• max.in.flight.requests.per.connection и enable.idempotence: max.in.flight.requests.per.connection определяет общее число неподтверждённых запросов для одного клиента при сохранении гарантированной очерёдности. Если для enable.idempotence задано значение true, только одна копия сообщения будет записана в топик; если false, сообщения могут повторяться.

  Почему эти параметры важны? Если вкратце, они могут влиять на порядок сообщений в топике, особенно когда включены повторные попытки, max.in.flight.requests.per.connection больше 1, а enable.idempotence=false. Представим, что продюсер отправляет два запроса с сообщениями для одной партиции в брокере. Первый пакет доставить не удалось и продюсер пытается отправить его заново, а второй пакет успешно дошёл. В итоге второй пакет с сообщениями опередит первый. Если вам важен порядок сообщений, но при этом вы хотите использовать повторные попытки, не задавайте для max.in.flight.requests.per.connection значение больше 1, а для enable.idempotence=false.

• acks. Если вы хотите полностью отключить повторные попытки, задайте для этого параметра значение 0. В этом случае продюсер отправит запрос и не будет волноваться о том, дошёл он или нет. (Больше о гарантиях доставки см. в статье о пяти вещах, которые должен знать любой, кто работает с Kafka.) Если повторные попытки нужны, у acks не должно быть значения 0.

Определитесь с этим решением, прежде чем настраивать параметры конфигурации продюсера. Если вам нужны повторные попытки, установите для параметра retries значение больше 1, а для параметра acks — 1 или all. Вы хотите, чтобы продюсер не тратил время на повторную отправку и выдавал исключение в случае любых проблем? Отключите повторные попытки, установив retries=0. (В этом случае вы всё равно сможете сами обрабатывать исключения в коде клиента.)

До сих пор мы говорили о проблемах при взаимодействии клиента с кластером, а что же сам кластер? Какие проблемы могут возникать с брокерами и как решать эти проблемы?

3. Не отслеживаем ключевые метрики брокера

Брокеры Kafka предоставляют очень полезные метрики JMX для оценки общей работоспособности кластера. К сожалению, иногда администраторы кластера упускают эту ценную информацию.

Одни метрики очевидны и понятны, с другими не все так просто. Если вы пока не знаете с чего начать, вот вам пять самых полезных метрик:

• kafka.server:type=ReplicaManager,name=UnderReplicatedPartitions. У каждой партиции есть реплики, которые хранятся на разных брокерах в кластере. Данные записываются на ведущий брокер и реплицируются по фолловерам. Эта метрика считает партиции, для которых ещё не создано нужное число реплик. Любое значение этой метрики указывает на сбой работоспособности, потому что данные реплицируются не так, как нам хотелось бы.

• kafka.network:type=SocketServer,name=NetworkProcessorAvgIdlePercent. Эта метрика показывает процент свободных сетевых потоков, которые выполняют обработку. Все запросы Kafka проходят через сетевые потоки, так что это важная метрика. 0 — все ресурсы недоступны, а 1 — все ресурсы доступны. Нормальным будет значение выше 30%, чтобы ресурсы кластера не находились на пределе постоянно.

• kafka.server:type=KafkaRequestHandlerPool,name=RequestHandlerAvgIdlePercent. Обработчик запроса берет запрос из очереди, обрабатывает его и выводит ответ в очередь ответов. Эта метрика показывает процент свободных потоков для обработки запросов в брокерах. 0 — потоки обработки запросов полностью недоступны, 1 — все доступны. Это значение тоже должно быть выше 30%.

• kafka.network:type=RequestChannel,name=RequestQueueSize. Общее количество запросов в очереди. Чем больше это число, тем длиннее очередь, так что мы надеемся на небольшое значение. Эте метрику можно использовать вместе с NetworkProcessorAvgIdlePercent и RequestHandlerAvgIdlePercent, чтобы получить хорошее представление о загруженности всего конвейера запросов Kafka.

• kafka.network:type=RequestMetrics,name=TotalTimeMs,request={Produce|FetchConsumer|FetchFollower}. Сколько времени уходит на определённый тип запроса (включая время на отправку). Это серия метрик для каждого типа запросов: produce, fetchConsumer и fetchFollower. Хорошая метрика для оценки задержки в системе. Чем ниже значение, тем здоровее кластер.

Задержка запросов в брокере (как быстро брокер обрабатывает запросы) многое говорит о работоспособности кластера. Можно, конечно, отслеживать работоспособность запросов с помощью логов запросов, но они слишком подробные и сильно влияют на производительность. Метрики в этом плане гораздо лучше. Нельзя просто взять и проигнорировать их. Будут последствия — например, замедлится обработка запросов.

Если вы не знали о метриках JMX или не уделяли им должного внимания, самое время взяться за них. Если вы знаете, что они существуют, — это уже полдела. Теперь начните принимать меры и повышать работоспособность и отказоустойчивость кластера. Приведённые здесь метрики — лишь верхушка айсберга. Рекомендуем изучить дополнительные ресурсы:

• Полный список метрик для брокера;

• Стеки мониторинга JMX для Confluent Platform;

• Мониторинг потоков событий: интеграция Confluent с Prometheus и Grafana;

• Обзор наблюдаемости и настройка Confluent Cloud.

Вы, наверное, думаете: «Зачем мне метрики брокера, если какой-нибудь неавторизованный клиент будет нарушать работу кластера, а я этого даже не увижу!» Это и правда важно, поэтому существует KIP 714, чтобы улучшить наблюдаемость клиента в брокере. Здорово же?

Вас пугает мысль о мониторинге всех этих метрик? Confluent Cloud, полностью управляемый сервис Kafka, сделает всё за вас. Метрики задержки, использования и загрузки предоставляются по умолчанию для выделенных кластеров.

4. Создаём слишком много партиций

Партиции в Kafka отвечают за параллелизм — конечно, с учётом пропускной способности клиентов и других факторов. Чтобы увеличить общую пропускную способность, нужно создать побольше партиций. Логично? Не совсем. Много партиций тоже не всегда хорошо:

• Больше обработчиков файлов, чем поддерживается операционной системой. Когда в топик поступает сообщение, оно сохраняется в партиции. По сути, данные добавляются в файл сегмента лога (подробности ниже), а соответствующий файл индексов обновляется. Обработчик файла есть и у файла с данными, и у файла индексов. Допустим, у нас есть 10 топиков, в каждом по 50 партиций. Всего получается 2000 обработчиков файлов. Linux, например, разрешает не больше 1024 дескрипторов на процесс.

• Больше рисков, что партиции будут недоступны при сбое брокера. В идеальном отказоустойчивом кластере каждая партиция несколько раз реплицируется по брокерам в кластере. Один брокер хранит ведущую реплику, остальные реплики считаются фолловерами. В случае сбоя брокера хранящиеся на нем партиции с ведущими репликами будут какое-то время недоступны, пока контроллер (ещё один брокер в кластере) не выберет новые ведущие реплики из фолловеров.

  Сценариев может быть три: запланированная остановка, незапланированный сбой и сбой контроллера. В случае запланированной остановки новый ведущий брокер можно выбрать заранее и простой будет коротким. При незапланированном сбое все партиции с ведущим репликами на отвалившемся брокере будут недоступны, пока контроллер выбирает ведущие реплики. Если сбой произошёл на контроллере, всё становится ещё хуже — нужно ждать, пока новый контроллер будет выбран и инициализирован, а для этого он должен считать метаданные для каждой партиции в ZooKeeper. В двух последних сценариях время, которое партиции будут недоступны, напрямую зависит от количества партиций в кластере. Чем больше партиций, тем дольше простой.

• Увеличение общей задержки. Сообщения в топике доступны консьюмерам только после фиксации на всех синхронизированных репликах. Чем больше партиций, тем больше пропускной способности требуется для их репликации. Из-за лишних задержек на этом шаге увеличивается время между моментом, когда продюсер записывает сообщение, и моментом, когда консьюмер сможет его прочитать.ы

Кроме того, если вы используете Kafka с ZooKeeper, там есть лимит на партиции — примерно 4000 на брокер и 200 000 на кластер. С отказом от ZooKeeper (в результате реализации KIP-500) нас ждут большие изменения. Кластер больше не будет хранить метаданные партиций и брокеров в ZooKeeper, так что масштабируемость серьёзно возрастёт. Как показывают тесты, с новым контроллером метаданных на основе кворума партиций может быть хоть 2 миллиона.

Как избежать всех этих проблем? Тщательно всё обдумайте и найдите баланс, чтобы партиций было достаточно для поддержания хорошей пропускной способности, но при этом не слишком много. Количество партиций в топике можно менять, но обычно это нежелательно, потому что изменится порядок сообщений.

Сколько партиций должно быть в топике?

Для расчёта есть отличная формула. Создавая топик в кластере Kafka, нужно первым делом оценить желаемую пропускную способность (t) в МБ/с. Затем прикиньте возможную пропускную способность для одной партиции (p). На неё влияет конфигурация продюсера, но обычно это где-то десятки МБ/с. Наконец, определите пропускную способность консьюмера (c). Она зависит от приложения и её придётся измерить самостоятельно. Партиций в топике должно быть как минимум max(t/p, t/c). Если, допустим, вы стремитесь к пропускной способности 250 МБ/с, а пропускная способность продюсера и консьюмера — 50 и 25 МБ/с соответственно, в топике должно быть не меньше max(250/50, 250/25) = max(5, 10) = 10.

5. Устанавливаем слишком маленькое значение segment.ms

Мы записываем сообщения в партиции, но если говорить о хранении фактических байтов на диске, Kafka разделяет каждую партицию на сегменты. Сегмент представляет собой файл с данными на диске. Нужно понимать, как работают и настраиваются сегменты, чтобы поддерживать оптимальную работу брокеров.

Когда сообщения записывают в топик, данные просто добавляются в последний открытый файл сегмента лога в партиции, куда направлено сообщение. Пока файл сегмента открыт, он не рассматривается как кандидат на удаление или сжатие. По умолчанию файлы сегментов лога остаются открытыми до заполнения (1 ГБ). Это значение указывается параметром конфигурации segment.bytes на уровне топика. Можно указать на уровне топика значение segment.ms, чтобы сегменты принудительно закрывались через этот период времени.

Иногда пользователи задают для  segment.ms очень маленькое значение, чтобы чаще запускать сжатие или удаление и тем самым экономить память. Если период segment.ms будет слишком коротким (по умолчанию — 7 дней), в кластере будет создаваться очень много маленьких файлов сегмента. В результате будет возникать исключение, связанное с нехваткой памяти или слишком большим количеством открытых файлов. Много маленьких или пустых файлов сегмента повлияют на производительность консьюмеров топика. При запросе fetch консьюмеры получают данные максимум из одного сегмента партиции. Если сегменты очень маленькие, консьюмеры получат мало данных за раз, а значит придётся сделать больше запросов к брокеру.

Чтобы избежать этой проблемы, нужно как следует продумать конфигурацию при создании и администрировании топиков в кластере. Если для параметра segment.ms вы задали маленькое значение, нужно как можно скорее вернуть значение по умолчанию. Изменения не повлияют на уже созданные сегменты.

Заключение

Советы по предотвращению типичных ошибок:

• Не задавайте слишком маленькое значение для параметра request.timeout.ms.

• Просмотрите настройки повторных попыток и исключения. допускающие повторные попытки, когда будете в следующий раз писать клиент продюсера.

• Отслеживайте метрики брокера и работоспособность кластера.

• Следите за количеством партиций, особенно при создании новых топиков.

• Не задавайте слишком маленькое значение для параметра segment.ms.

Используйте полностью управляемое решение (например, Confluent Cloud), чтобы уберечься от ошибок, связанных с брокерами. Сосредоточитесь на написании клиентских приложений, а не обслуживании брокеров. 

Как еще предотвратить ошибки в Kafka