Ошибка 6120 kyocera 4300

Все современные копировальные аппараты, мфу и принтеры Kyocera имеют возможность диагностировать все узлы устройства в режиме запуска и во время работы аппарата. По этому, если во время включения или во время работы произошел сбой, то техника Kyocera сможет сообщить о наличии ошибки.

В большинстве случаев у аппаратов Kyocera код ошибки отображается на дисплее, в остальных случаях тип ошибки зависит от последовательности и количества миганий индикаторов.
Если Ваш копировальный аппарат, МФУ или принтер Kyocera выдал на дисплее некий код, то узнать причину, описание возникновения ошибки, а так же в каком узле аппарата стоит искать проблему, Вы можете в этом разделе выбрав интересующую модель из списка.

Но диагностика не решит проблему сбоя аппарата, для этого лучше обратиться к профессиональным и опытным сервисным специалистам компании Kyomart! Позвоните нам по телефону
8 (343) 288-23-45 или отправьте запрос на электронную почту: sales@kyomart.ru , и мы обязательно свяжемся с Вами в кратчайшие сроки.

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1. 06-01-2016

   
   

   #1

   FS-4200 C6120 Error Code
   

   Hello all, I am currently dealing with a Kyocera FS-4200 that is giving a C6120, Abnormally high fuser thermistor 1 temperature, I’ve checked the pins and the triacs, replaced the Fuser, the Power Supply Board, and the Engine Board, all with the same result, C6120. Has anyone ever seen this problem before and if so, how did you resolve it? Any help or advice would be greatly appreciated. Thank you in advanced.

   ---

2. 06-01-2016

   
   

   #2

   Re: FS-4200 C6120 Error Code
   

   Did you install the new fuser as to the service manual instructions below ?. If it is not installed correctly, the fuser will not turn and the machine will detect an over heat condition and code out.

   [60/50/45 ppm model]
   8. Remove the screw and then remove the
   fuser unit forward.
   9. Check or replace the fuser unit and refit
   all the removed parts.
   Caution: when refitting the fuser unit, perform
   the following procedures.
   (1)Turn on the power switch while opening the
   rear cover after removing the fuser unit.
   (2)Turn off the power switch after 5-second or
   more progress.
   (release state of fixing pressure)
   (3)Refit the fuser unit.

   If you did the install correctly, then check the

   10. Fuser thermistor relay PWB
   (FUTHRPWB) ………………………………… Consists of wiring relay circuit between engine PWB ,fuser
   thermistors and cooling fans.
   see page 197 of the service manual wiring diagram.
   check the continuity of the wiring going from fuser to this board and the connectors if they are in properly.

   THE ONLY THING FOR EVIL TO TRIUMPH IS FOR GOOD MEN TO DO NOTHING……….edmund burke

   ---

3. 06-02-2016

   
   

   #3

   Re: FS-4200 C6120 Error Code
   

   Got it figured out, turns out some moisture had somehow gotten onto the Thermistor relay PWB, rusting and shorting it, I also found something that suggests user neglect.
   We changed out the PWB with one we had on hand and bada bing bada boom it came up without a problem, will be having a discussion with customer about this, thank you for your help, I would not have even looked at that PWB without your suggestion.

   ---

4. 06-02-2016

   
   

   #4

   Re: FS-4200 C6120 Error Code
   

   Originally Posted by RoyROd
   

   Got it figured out, turns out some moisture had somehow gotten onto the Thermistor relay PWB, rusting and shorting it, I also found something that suggests user neglect.
   We changed out the PWB with one we had on hand and bada bing bada boom it came up without a problem, will be having a discussion with customer about this, thank you for your help, I would not have even looked at that PWB without your suggestion.

   
   

   My question is why would you not have looked at that pwb. Good troubleshooting would make use of the manuals, electrical schematic drawings and component layout and definitions. Great that you solved the problem.

   THE ONLY THING FOR EVIL TO TRIUMPH IS FOR GOOD MEN TO DO NOTHING……….edmund burke

   ---

Tags for this Thread

• Code: 0100
• Description: Backup memory device error
• Causes: Defective flash memory.
  Defective main PWB.
• Remedy: 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:
• 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: 0130
• Description: Backup memory read/write error (main PWB)
• Causes: Defective flash memory.
  Defective main PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: 0140
• Description: Backup memory data error (main PWB)
• Causes: Defective flash memory.
  Defective main PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: 0150
• Description: Backup memory read/write error (engine PWB)
  Detecting engine PWB EEPROM communication error.
• Causes:
• Remedy: Improper installation engine PWB 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)
• Causes: Defective EEPROM.
  Defective engine PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: 0170
• Description: Billing counting error
  A checksum error is detected in the main and engine backup memories for the billing counters.
• Causes:
• 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: 0190
• Description: Backup memory device error (engine PWB)
• Causes: Defective engine PWB.
• Remedy: Replace the engine PWB and check for correct operation.

• Code: 0800
• Description: Image processing error
  JAM010x is detected twice.
• Causes:
• 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 thermistor 1/2 and fuser thermistor connect PWB(YC1/2) Fuser thermistor connect PWB(YC3) and engine PWB (YC21)
  Defective fuser thermistor. Replace the fuser thermistor connect PWB. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.
  Defective main PWB. Replace the main PWB and check for correct operations.

• Code: 0840
• Description: Faults of RTC
  Unable to communicate with the RTC device normally. The RTC data is mismatched due to dead battery or short-circuit with the metal part.
• Causes:
• Remedy: Other RTC device failure due to dead battery or short-circuit with the metal part. Restart the main unit and set the correct time from the operation panel. Repair it if the battery comes off from the main PWB.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 1010
• Description: Lift motor error
  After cassette 1 is inserted, lift sensor does not turn on within 10 s. This error is detected five times successively.
• Causes:
• 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 and engine PWB (YC13)
  Defective drive transmission system of the lift 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. Replace the lift motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 1020
• Description: PF lift motor 1 error (paper feeder)
  After cassette 2 is inserted, PF lift sensor 1 does not turn on. This error is detected four times successively.
• Causes:
• 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 the PF lift 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. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB.

• Code: 1030
• Description: PF lift motor 2 error (paper feeder)
  After cassette 3 is inserted, PF lift sensor 2 does not turn on. This error is detected four times successively.
• Causes:
• 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 the PF lift 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. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB.

• Code: 1040
• Description: PF lift motor 3 error (paper feeder)
  After cassette 4 is inserted, PF lift sensor 3 does not turn on. This error is detected four times successively.
• Causes:
• 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 3 and PF main PWB (YC7)
  Defective drive transmission system of the PF lift 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. Replace the PF lift motor 3.
  Defective PF main PWB. Replace the PF main PWB.

• Code: 1050
• Description: PF lift motor 4 error (paper feeder)
  After cassette 5 is inserted, PF lift sensor 4 does not turn on. This error is detected four times successively.
• Causes:
• 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 4 and PF main PWB (YC7)
  Defective drive transmission system of the PF lift 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. Replace the PF lift motor 4.
  Defective PF main PWB. Replace the PF main PWB.

• Code: 1140
• Description: BPF lift motor upward error (Bulk paper feeder)
  BPF lift maximum sensor does not turn on. The lock signal of the motor is detected continuously three times.
• Causes:
• 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. BPF lift motor and BPF main PWB (YC4)
  Defective drive transmission system of the motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective BPF lift motor. Replace the BPF lift motor.
  Defective BPF main PWB. Replace the BPF main PWB.

• Code: 1150
• Description: BPF lift motor downward error (Bulk paper feeder)
  BPF lift minimum sensor does not turn on. The lock signal of the motor is detected continuously three times. When detecting an overcurrent detection signal.
• Causes:
• 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. BPF lift motor and BPF main PWB (YC4)
  Defective drive transmission system of the motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective BPF lift motor. Replace the BPF lift motor.
  Defective BPF main PWB. Replace the BPF main PWB.

• Code: 1800
• Description: Paper feeder 1 communication error
  A communication error is detected 10 times in succession.
• Causes:
• Remedy: Improper installation paper feeder. Follow installation instruction carefully again.
  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 main PWB (YC3) and engine PWB (YC22)
  Defective engine PWB. Replace the engine PWB and check for correct operation.
  Defective PF main PWB. Replace the PF main PWB.

• Code: 1810
• Description: Paper feeder 2 communication error
  A communication error is detected 10 times in succession.
• Causes:
• Remedy: Improper installation paper feeder. Follow installation instruction carefully again.
  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 main PWB (YC3) and engine PWB (YC22)
  Defective PF main PWB. Replace the PF main PWB.

• Code: 1820
• Description: Paper feeder 3 communication error
  A communication error is detected 10 times in succession.
• Causes:
• Remedy: Improper installation paper feeder. Follow installation instruction carefully again.
  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 main PWB (YC3) and engine PWB (YC22)
  Defective PF main PWB. Replace the PF main PWB.

• Code: 1830
• Description: Paper feeder 4 communication error
  A communication error is detected 10 times in succession.
• Causes:
• Remedy: Improper installation paper feeder. Follow installation instruction carefully again.
  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 main PWB (YC3) and engine PWB (YC22)
  Defective PF main PWB. Replace the PF main PWB.

• Code: 1900
• Description: Paper feeder 1/BPF paper feeder EEPROM error
  When writing the data, the write data and the read data is not in agreement.
• Causes: Defective PF main PWB.
  Device damage of EEPROM.
• Remedy: Replace the PF main PWB or the BPF main PWB.

• Code: 1910
• Description: Paper feeder 2 EEPROM error
  When writing the data, the write data and the read data is not in agreement.
• Causes: Defective PF main PWB.
  Device damage of EEPROM.
• Remedy: Replace the PF main PWB.

• Code: 1920
• Description: Paper feeder 3 EEPROM error
  When writing the data, the write data and the read data is not in agreement.
• Causes: Defective PF main PWB.
  Device damage of EEPROM.
• Remedy: Replace the PF main PWB.

• Code: 1930
• Description: Paper feeder 4 EEPROM error
  When writing the data, the write data and the read data is not in agreement.
• Causes: Defective PF main PWB.
  Device damage of EEPROM.
• Remedy: Replace the PF main PWB.

• Code: 2000
• Description: Main motor drive error
  The main motor is not stabilized within 2 s after driving starts.
• Causes:
• 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. Main motor and engine PWB (YC4)
  Defective drive transmission system of the main motor. Check if the rollers and gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective main motor. Replace the main motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2010
• Description: Main motor steady-state error
  Stable OFF is detected for 2 s continuously after main motor stabilized.
• Causes:
• 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. Main motor and engine PWB (YC4)
  Defective drive transmission system of the main motor. Check if the rollers and gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective main motor. Replace the main motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2200
• Description: Drum motor drive error
  The drum motor is not stabilized within 2 s after driving starts.
• Causes:
• 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 and engine PWB (YC4)
  Defective drive transmission system of the drum motor. Check if the rollers and gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor. Replace the drum motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2210
• Description: Drum motor steady-state error
  Stable OFF is detected for 2 s continuously after drum motor stabilized.
• Causes:
• 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 and engine PWB (YC4)
  Defective drive transmission system of the drum motor. Check if the rollers and gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective drum motor. Replace the drum motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 2330
• Description: Fuser pressure release motor error (Over-current)
  The over-current detection signal of the motor is detected continuously twenty times.
• Causes:
• 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 pressure release motor and relay-L PWB(YC11) Relay-L PWB(YC3) and engine PWB(YC2)
  Defective drive transmission system of the fuser pressure release motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective fuser pressure release motor. Replace the fuser pressure release motor.
  Defective PWB. Replace the relay-L PWB or engine PWB.

• Code: 2340
• Description: Fuser pressure release motor error (Timeout)
  The position detection sensor is not detected continuously for 30 s.
• Causes:
• 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 pressure release motor and relay-L PWB(YC11) Relay-L PWB(YC1) and engine PWB(YC2)
  Defective drive transmission system of the fuser pressure release motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective fuser pressure release motor. Replace the fuser pressure release motor.
  Defective PWB. Replace the relay-L PWB or engine PWB.

• Code: 2600
• Description: PF drive motor 1 error (paper feeder 1)
  When the PF drive motor is driven, error signal is detected continuously for 2 s.
• Causes:
• 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 drive motor 1 and PF main PWB (YC6)
  Defective drive transmission system of the PF drive motor. Check if the rollers and gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF drive motor. Replace the PF drive motor 1.
  Defective PF main PWB. Replace the PF main PWB.

• Code: 2610
• Description: PF drive motor 2 error (paper feeder 2)
  When the PF drive motor is driven, error signal is detected continuously for 2 s.
• Causes:
• 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 drive motor 2 and PF main PWB (YC6)
  Defective drive transmission system of the PF drive motor. Check if the rollers and gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF drive motor. Replace the PF drive motor 2.
  Defective PF main PWB. Replace the PF main PWB.

• Code: 2620
• Description: PF drive motor 3 error (paper feeder 3)
  When the PF drive motor is driven, error signal is detected continuously for 2 s.
• Causes:
• 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 drive motor 3 and PF main PWB (YC6)
  Defective drive transmission system of the PF drive motor. Check if the rollers and gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF drive motor. Replace the PF drive motor 3.
  Defective PF main PWB. Replace the PF main PWB.

• Code: 2630
• Description: PF drive motor 4 error (paper feeder 4)
  When the PF drive motor is driven, error signal is detected continuously for 2 s.
• Causes:
• 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 drive motor 4 and PF main PWB (YC6)
  Defective drive transmission system of the PF drive motor. Check if the rollers and gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF drive motor. Replace the PF drive motor 4.
  Defective PF main PWB. Replace the PF main PWB.

• Code: 4000
• Description: Polygon motor synchronization error
  The polygon motor is not stabilized within 20 s after driving starts.
• Causes:
• 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 and engine PWB (YC15)
  Defective polygon motor. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 4101
• Description: BD steady-state error
  When the value of Register BDSET is 1 after setting Register BDSET as one and passing by BD1 cycle.
• Causes:
• 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(YC1) and engine PWB (YC16) APC PWB(YC2) and PD PWB(YC1)
  Defective PD PWB. Replace the laser scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 5100
• Description: Chager current error When the current value measured at the time of potential adjustment is less than 20 uA.
• Causes:
• 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. Chager unit and high voltage PWB High voltage PWB (YC101) and engine PWB (YC19)
  Defective high voltage PWB. Replace the high voltage PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6000
• Description: Broken fuser heater wire
  The detection temperature of fuser thermistor 2 is 100 °C/212°F or less after the fuser heater lamp has been turned on continuously for 30 s.
• Causes:
• 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 heater and power source PWB (YC2) Fuser thermistor and Fuser thermistor connect PWB(YC1 and YC2) Fuser thermistor connect PWB(YC3) and engine PWB (YC21)
  Deformed connector pin.
  Defective triac.
  Fuser thermostat triggered. Reinsert the fuser unit.
  Broken fuser heater wire.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6020
• Description: Abnormally high fuser thermistor 2 temperature
  The detection temperature of fuser thermistor 2 is higher than 235°C/ 455°F.
  In a heater-off state, the detection temperature of fuser thermistor 2 is higher than 195°C/383°F after the detection temperature of fuser thermistor 2 was 155°C/311°F or less.
• Causes:
• Remedy: Deformed connector pin.
  Defective triac.
  Shorted fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6030
• Description: Broken fuser thermistor 2 wire
  A/D value of the fuser thermistor 2 exceeds 1019 bit continuously for 4 s during warming up.
• Causes:
• 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 thermistor and fuser thermistor connect PWB(YC2) Fuser thermistor connect PWB(YC3) and engine PWB (YC21)
  Deformed connector pin.
  Defective triac.
  Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6120
• Description: Abnormally high fuser thermistor 1 temperature
  The detection temperature of fuser thermistor 1 is higher than 245°C/ 473°F.
  In a heater-off state, the detection temperature of fuser thermistor 1 is higher than 195°C/383°F after the detection temperature of fuser thermistor 1 was 155°C/311°F or less.
• Causes:
• Remedy: Deformed connector pin.
  Defective triac.
  Shorted fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6130
• Description: Broken fuser thermistor 1 wire
  A/D value of the fuser thermistor 1 exceeds 1019 bit continuously for 4 s during warming up.
• Causes:
• 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 thermistor and fuser thermistor connect PWB(YC1) Fuser thermistor connect PWB(YC3) and engine PWB (YC21)
  Deformed connector pin.
  Defective triac.
  Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6400
• Description: Zero-cross signal error
  While fuser heater control is performed, the zero-cross signal is not input within 2 s.
• Causes:
• 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 engine PWB (YC1)
  Defective power source PWB or engine PWB. Replace the power source PWB or the engine PWB and check for correct operation.

• Code: 7100
• Description: Toner sensor error
  Sensor output value of 930 or more continuously for 5 s.
• Causes:
• 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 and drum PWB (YC3) Drum connect PWB(YC2) and relay-L PWB (YC3) Relay-L PWB(YC1) and engine PWB (YC2)
  Defective toner sensor. Replace the developer unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7400
• Description: Developer unit non-installing error
  Sensor output value of 31 or less continuously for 5 s.
• Causes:
• 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 and drum PWB (YC3) Drum connect PWB(YC2) and relay-L PWB (YC3) Relay-L PWB(YC1) and engine PWB (YC2)
  Defective toner sensor. Replace the developer unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7410
• Description: Drum unit type mismatch error
  The drum PWB EEPROM does not communicate normally. Absence of the drum unit is detected.
• Causes:
• 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 unit and drum connect PWB (YC1) Drum connect PWB(YC2) and relay-L PWB (YC3) Relay-L PWB(YC1) and engine PWB (YC2)
  Defective toner sensor. Replace the drum unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7800
• Description: Broken external thermistor wire
  The average of thermistor output value of 93 or less.
• Causes:
• 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. Operation PWB (YC1) and engine PWB (YC17)
  Defective temperature sensor. Replace the operation PWB.

• Code: 7810
• Description: Short-circuited external thermistor wire
  The average of thermistor output value of 930 or more.
• Causes:
• 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. Operation PWB (YC1) and engine PWB (YC17)
  Defective temperature sensor. Replace the operation PWB.

• Code: 7900
• Description: Drum unit 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 eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes:
• 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 unit and drum connect PWB (YC1) Drum connect PWB(YC2) and relay-L PWB (YC3) Relay-L PWB(YC1) and engine PWB (YC2)
  Defective drum unit. Replace the drum unit.

• Code: F000
• Description: Main PWB — operation PWB communication error
• Causes:
• 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. Operation PWB(YC1) and engine PWB (YC17)
  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: F020
• Description: Main PWB RAM checksum error
• Causes:
• Remedy: Defective main memory (RAM) in main PWB Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.
  Defective expended memory (DIMM) Replace the expansion memory (DIMM). Also in the case of the capacity besides specification, it displays.

• Code: F040
• Description: Main PWB — print engine communication error
• Causes:
• 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: 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.