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• Code: 0030
• Description: FAX control PWB system error
  Processing with the fax software was disabled due to a software problem.
• Causes: FAX control PWB.
• Remedy: 1. Turn the main power swtch off and after 5 seconds, re-mount the FAX controller PWB, then turn power on. 2. Reinstall the fax software. 3. Replace the FAX control PWB.

• Code: 0060
• Description: Control PWB mismatch
  Unmatching engine and engine sub boards. Defective engine subboard
• Causes: Control PWB
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Replace the 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: FAX control PWB (The FAX PWB installed will not be the one designed for the machine.
• Remedy: 1. Install the FAX system designed for the model. 2. Reinstall the fax software.

• Code: 0100
• Description: Backup memory device error
• Causes: EEPROM (Control PWB)
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Check that the EEPROM on the main circuit PWB is peroperly installed on the main circuit PWB and, if not, re-install it. 3. Replace the control PWB and check for correct operation.

• Code: 0110
• Description: Backup memory data error
• Causes: EEPROM (Control PWB)
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Check that the EEPROM on the main circuit PWB is peroperly installed on the main circuit PWB and, if not, re-install it. 3. Replace the control PWB and check for correct operation.

• Code: 0120
• Description: MAC address data error
  For data in which the MAC address is invalid.
• Causes: EEPROM (Control PWB)
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Check the MAC address on the network status page. 3. If it is blank, obtain an EEPROM with its MAC address written from the service support and install. 4. Replace the control PWB and check for correct operation.

• Code: 0130
• Description: Backup memory read/write error (main NAMD)
• Causes: Flash memory (Control PWB)
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Replace the control PWB and check for correct operation

• Code: 0140
• Description: Backup memory data error (main NAND)
• Causes: Flash memory (Control PWB)
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Replace the control PWB and check for correct operation.

• Code: 0150
• Description: Backup memory read/write error (control 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: EEPROM (Control PWB)
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Check that the EEPROM is peroperly installed on the control PWB and reinstall it. 3. Replace the control PWB and check for correct operation. 4. Check the EEPROM and if the data are currupted, contact the service support.

• Code: 0160
• Description: Backup memory data error (control PWB)
  Reading data from EEPROM is abnormal.
• Causes: EEPROM
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Execute U021 — memory initializing. 3. If the EEPROM data are currupted, contact the service support.

• Code: 0170
• Description: Billing counting error
  The values on the main circuit PWB and on the engine do not match for any of charging counter, life counter, and scanner counter.
• Causes: EEPROM. Control PWB
• Remedy: EEPROM 1. Check that the EEPROMs installed in the control PWB are correct and, if not, use the correct EEPROM for the model. 2. If the EEPROM data are currupted, contact the service support.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 0180
• Description: Machine number mismatch
  Machine number of control does not match.
• Causes: Data damage of EEPROM.
• Remedy: 1. Confirm the machine data for the control units by using U004. 2. If the serial number data of different models is alternately displayed, install the correct EEPROM in the PWB of the wrong serial number data. 3. Contact the Service Support.

• Code: 0190
• Description: Backup memory device error (control PWB)
• Causes: Control PWB
• Remedy: Control PWB Replace the control PWB and check for correct operation.

• Code: 0800
• Description: Image processing error
  JAM010X is detected twice.
• Causes: Control PWB.
• Remedy: Control PWB Replace the control 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: FAX software. FAX control PWB.
• Remedy: FAX software 1. Reinstall the fax software.
  FAX control PWB 1. Execute initializing by U600.(Refer to the FAX service manual) 2. Replace the FAX control PWB.

• Code: 0840
• Description: Faults of RTC (“Time for maintenance T” is displayed) [Check at power up]
  The RTC setting has reverted to a previous state. The machine has not been powered for 5 years (compared to the settings stored periodically in the EEPROM). The RTC setting is older than 00:01 on January 1, 2000. [Checked periodically (in 5- minute interval) after powered up] The RTC setting has reverted to a state older than the last time it was checked. 10 minutes have been passed since the previous check.
• Causes: Battery (Control PWB). Control PWB.
• Remedy: Battery (Control PWB) 1. Make sure that the back-up batteries on the control PWB are not short-circuited. 2. If the same C call is displayed when power is switched on and off, replace the back up battery. 3. If communication error (due to a noise, etc.) is present with the RTC on the control PWB, check the PWB is properly grounded.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 0870
• Description: PCFAX 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: FAX control PWB. Control PWB.
• Remedy: FAX control PWB 1. Turn the main power swtch off and after 5 seconds, re-mount the FAX controller PWB, then turn power on. 2. Replace the FAX control PWB.
  Control PWB Replace the 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: FAX control PWB.
• Remedy: FAX control PWB 1. Execute initializing by U600 (Refer to the FAX service manual). 2. Replace the FAX control PWB.

• Code: 0970
• Description: 24 V power down detect
  If a 24V power disconnection signal is observed and a 12V power disconnection signal is observed simultaneously for one second.
• Causes: Connect right PWB. Control PWB
• Remedy: Connect right PWB 1. Check the +24V output is given at YC4- 10 to 13 of the connect right PWB. 2. Replace the connect right PWB
  Control PWB Replace the control PWB

• Code: 1010
• Description: Lift motor error (50/60 ppm model only)
  After cassette 1 is inserted, lift sensor does not turn on within 10 s. This error is detected four times successively.
• Causes: Bottom plate elevation mechanism in the cassette. Connector cable or poor contact in the connector. Drive transmission system of the lift motor. Lift motor. Connect right PWB. Control PWB.
• Remedy: 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.
  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 connect right PWB (YC9) Connect right PWB and control PWB (YC29)
  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.
  Lift motor Replace the lift motor.
  Connect right PWB Replace the connect right PWB.
  Control PWB Replace the control 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: Bottom plate elevation mechanism in the cassette. Connector cable or poor contact in the connector. Drive transmission system of the PF lift motor. PF lift motor. PF main PWB.
• Remedy: 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.
  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)
  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.
  PF lift motor Replace the PF lift motor 1.
  PF main PWB Replace the PF main PWB (Refer to the service manual for the paper feeder).

• 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: Dottom plate elevation mechanism in the cassette. Connector cable or poor contact in the connector. Drive transmission system of the PF lift motor. PF lift motor. PF main PWB.
• Remedy: Dottom plate elevation mechanism in the cassette Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  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)
  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.
  PF lift motor Replace the PF lift motor 2.
  PF main PWB Replace the PF main PWB (Refer to the service manual for the paper feeder).

• 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: Bottom plate elevation mechanism in the cassette. Connector cable or poor contact in the connector. Drive transmission system of the PF lift motor. PF lift motor. PF main PWB.
• Remedy: 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.
  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)
  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.
  PF lift motor Replace the PF lift motor 3.
  PF main PWB Replace the PF main PWB (Refer to the service manual for the paper feeder).

• 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: Bottom plate elevation mechanism in the cassette. Connector cable or poor contact in the connector. Drive transmission system of the PF lift motor. PF lift motor. PF main PWB.
• Remedy: 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.
  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)
  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.
  PF lift motor Replace the PF lift motor 4.
  PF main PWB Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 1800
• Description: Paper feeder 1 communication error
  A communication error is detected 10 times in succession.
• Causes: Paper feeder. Connector cable or poor contact in the connector. PF main PWB. Control PWB.
• Remedy: Paper feeder Follow installation instruction carefully again.
  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 control PWB (YC22)
  PF main PWB Replace the PF main PWB (Refer to the service manual for the paper feeder).
  Control PWB Replace the control PWB and check for correct operation.

• Code: 1810
• Description: Paper feeder 2 communication error
  A communication error from paper feeder is detected 10 times in succession.
• Causes: Paper feeder. PF main PWB. Control PWB.
• Remedy: Paper feeder Check the wiring connection status with the main unit and, if necessary, try connecting it again.
  PF main PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. PF main PWB (YC1) and control PWB (YC22) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the PF main PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: 1820
• Description: Paper feeder 3 communication error
  A communication error from paper feeder is detected 10 times in succession.
• Causes: Paper feeder. PF main PWB. Control PWB
• Remedy: Paper feeder Check the wiring connection status with paper feeder unit 2 and, if necessary, try connecting it again.
  PF main PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. PF main PWB (YC1) and PF main PWB (YC22). 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the PF main PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: 1830
• Description: Paper feeder 4 communication error
  A communication error from paper feeder is detected 10 times in succession.
• Causes: Paper feeder. PF main PWB. Control PWB
• Remedy: Paper feeder Check the wiring connection status with paper feeder unit 3 and, if necessary, try connecting it again.
  PF main PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. PF main PWB (YC1) and PF main PWB (YC22). 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the PF main PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: 1900
• Description: Paper feeder 1 EEPROM error
  When writing the data, read and write data does not match 4 times in succession.
• Causes: PF main PWB (EEPROM)
• Remedy: PF main PWB (EEPROM) 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. 2. Replace the PF main PWB.

• Code: 1910
• Description: Paper feeder 2 EEPROM error
  When writing the data, read and write data does not match 4 times in succession.
• Causes: PF main PWB (EEPROM)
• Remedy: PF main PWB (EEPROM) 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in.Replace the PF main PWB.

• Code: 1920
• Description: Paper feeder 3 EEPROM error
  When writing the data, read and write data does not match 4 times in succession.
• Causes: PF main PWB (EEPROM)
• Remedy: PF main PWB (EEPROM) 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. 2. Replace the PF main PWB.

• Code: 1930
• Description: Paper feeder 4 EEPROM error
  When writing the data, read and write data does not match 4 times in succession.
• Causes: PF main PWB (EEPROM)
• Remedy: PF main PWB (EEPROM) 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. 2. Replace the PF main PWB.

• Code: 2000
• Description: Main motor startup error
  Main motor is not stabilized within 2 s since the motor is activated.
• Causes: Main motor. Connect right PWB. Control PWB
• Remedy: Main motor 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Main motor and connect right PWB (YC10) Connect right PWB and control PWB (YC29) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the main motor.
  Connect right PWB Replace the cconnect right PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: 2010
• Description: Main motor steady-state error
  After main motor is stabilized, the ready signal is not ready for 2 s continuously.
• Causes: Main motor. Connect right PWB. Control PWB.
• Remedy: Main motor 1. Check the drive gear can rotate or they are not unusually loaded and, if necessary, replace. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Main motor and connect rightl PWB (YC10) Connect right PWB and control PWB (YC29) 3. If the wiring is disconnected, shorted or grounded, replace the wiring. 4. Replace the main motor.
  Connect right PWB Replace the connect right PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: 2200
• Description: Drum motor drive error (50/60 ppm model only)
  The drum motor is not stabilized within 2 s after driving starts.
• Causes: Connector cable or poor contact in the connector. Drive transmission system of the drum motor. Drum motor. Connect right PWB. Control PWB.
• Remedy: 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 connect right PWB (YC10) Connect right PWB and control PWB (YC29)
  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.
  Drum motor Replace the drum motor.
  Connect right PWB Replace the connect right PWB.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 2210
• Description: Drum motor steady-state error (50/60 ppm model only)
  Stable OFF is detected for 2 s continuously after drum motor stabilized.
• Causes: Connector cable or poor contact in the connector. Drive transmission system of the drum motor. Drum motor. Connect right PWB. Control PWB.
• Remedy: 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 connect right PWB (YC10) Connect right PWB and control PWB (YC29)
  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.
  Drum motor Replace the drum motor.
  Connect right PWB Replace the connect right PWB.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 2330
• Description: Envelope motor error (Over-current) (50/60 ppm model only)
  The over-current detection signal of the motor is detected continuously twenty times.
• Causes: Connector cable or poor contact in the connector. Drive transmission system of the envelope motor. Envelope motor. Connect left PWB. Control PWB.
• Remedy: Connector cable or poor contact in the connector Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Envelope motor and connect left PWB (YC11) Connect left PWB and control PWB (YC2)
  Drive transmission system of the envelope motor Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Envelope motor Replace the envelope motor.
  Connect left PWB. Replace the connect left PWB.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 2340
• Description: Envelope motor error (Timeout) (50/60 ppm model only)
  The position detection sensor is not detected continuously for 30 s.
• Causes: Connector cable or poor contact in the connector. Drive transmission system of the envelope motor. Envelope motor. Connect left PWB. Control PWB.
• Remedy: Connector cable or poor contact in the connector Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Envelope motor and connect left PWB (YC11) Connect left PWB and control PWB (YC2)
  Drive transmission system of the envelope motor Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Envelope motor Replace the envelope motor.
  Connect left PWB Replace the connect left PWB.
  Control PWB Replace the control PWB and check for correct operation.

• 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: Connector cable or poor contact in the connector. Drive transmission system of the PF drive motor. DPF drive motor. DPF main PWB.
• Remedy: 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)
  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.
  DPF drive motor Replace the PF drive motor 1.
  DPF main PWB Replace the PF main PWB (Refer to the service manual for the paper feeder).

• 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: Connector cable or poor contact in the connector. Drive transmission system of the PF drive motor. PF drive motor. PF main PWB.
• Remedy: 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)
  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.
  PF drive motor Replace the PF drive motor 2.
  PF main PWB Replace the PF main PWB (Refer to the service manual for the paper feeder).

• 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: Connector cable or poor contact in the connector. Drive transmission system of the PF drive motor. PF drive motor. PF main PWB.
• Remedy: 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)
  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.
  PF drive motor Replace the PF drive motor 3.
  PF main PWB Replace the PF main PWB (Refer to the service manual for the paper feeder).

• 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: Connector cable or poor contact in the connector. Drive transmission system of the PF drive motor. PF drive motor. PF main PWB.
• Remedy: 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)
  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.
  PF drive motor Replace the PF drive motor 4.
  PF main PWB Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 3100
• Description: Scanner carriage error
  The home position is not correct when the power is turned on, at the end of a reading process of the table and document processor.
• Causes: Image scanner motor. Home position sensor. CCD PWB. Control PWB.
• Remedy: Image scanner motor 1. Move the scanner by the hand to check whether it is unusually difficult to move. 2. Check that the scanner driving belt is not disengaged. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Image scanner motor and control PWB (YC1002) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the image scanner motor.
  Home position sensor 1. Check that the sensor is correctly positioned. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Home position sensor and CCD PWB (YC3) CCD PWB and control PWB (YC1000) 3. Replace the home position sensor.
  CCD PWB Replace the image scanner unit and execute U411.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 3200
• Description: Exposure lamp error
  When a lamp is made to turn on one side at a time, the white standard data at the time of an initial is lower than a rated value.
• Causes: LED PWB. CCD PWB. Control PWB.
• Remedy: LED PWB 1. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. LED PWB and CCD PWB (YC2) CCD PWB and control PWB (YC1000) 2. Replace the image scanner unit.
  CCD PWB Replace the image scanner unit and execute U411.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 3500
• Description: Communication error between scanner and ASIC
  An error code is detected.
• Causes: CCD PWB. Control PWB.
• Remedy: CCD PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. CCD PWB and control PWB (YC1000) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the image scanner unit and execute U411.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 4000
• Description: Polygon motor steady-state error
  After Polygon motor is stabilized, the ready signal is at the H level for 20 s continuously.
• Causes: Polygon motor (LSU). Control PWB.
• Remedy: Polygon motor (LSU) 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Laser scanner unit and control PWB (YC15) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the laser scanner unit.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: 4200
• Description: BD steady-state error
  The BD signal is not detected.
• Causes: PD PWB (LSU). Control PWB.
• Remedy: PD PWB (LSU) 1. Confirm that the FCC wiring connector is not distorted and connect the FCC wiring all the way in. Laser scanner unit and control PWB (YC16) 2. If the FCC wiring is disconnected, shorted or grounded, replace the FCC wiring. 3. Replace the laser scanner unit.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control 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 mcA. The error of the charge current before toner installation. The error of the charge current before printing.
• Causes: Connector cable or poor contact in the connector. High voltage PWB. Control PWB.
• Remedy: 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 and control PWB (YC19)
  High voltage PWB Replace the high voltage PWB and check for correct operation.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 6000
• Description: Broken fuser heater wire (Center)
  (50/60 ppm model) Fuser thermistor 2 detects a temperature less than 100°C/ 212°F continuously for 30 s after a warm-up start. (40 ppm model) Fuser thermistor 1 detects a temperature less than 100°C/ 212°F continuously for 30 s after a warm-up start.
• Causes: Fuser unit. Fuser thermistor connect PWB. Control PWB. Power source PWB. Fuser heater.
• Remedy: Fuser unit 1. Check that no paper jam is present. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and fuser thermistor connect PWB (YC2) Fuser thermistor connect PWB and control PWB (YC21) 3. If the wiring is disconnected, shorted or grounded, replace the wiring. 4. Replace the Fuser unit. (Deteriorated sensitivity due to the toner adhered to the center thermistor.)
  Fuser thermistor connect PWB Replace the fuser thermistor connect PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.
  Power source PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Power source PWB and connect right PWB (YC4) Connect right PWB and control PWB (YC1) 2. Replace the power source PWB.
  Fuser heater 1. Replace the Fuser unit.

• Code: 6020
• Description: Abnormally high fuser thermistor 2 temperature (Center)
  (50/60 ppm model only) Fuser thermistor 2 detects a temperature 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: Fuser unit. Fuser thermistor connect PWB. Control PWB.
• Remedy: Fuser unit 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and fuser thermistor connect PWB (YC2) Fuser thermistor connect PWB and control PWB (YC21) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit.
  Fuser thermistor connect PWB Replace the fuser thermistor connect PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: 6030
• Description: Broken fuser thermistor 2 wire (Center)
  (50/60 ppm model only) Input from fuser thermistor 2 is 1019 or more (A/D value) continuously for 4 s.
• Causes: Fuser unit. Fuser thermistor connect PWB. Control PWB. Fuser thermistor 2. Fuser thermostat (triggered). Power source PWB
• Remedy: Fuser unit 1. Check that no paper jam is present. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and fuser thermistor connect PWB (YC2) Fuser thermistor connect PWB and control PWB (YC21) 3. If the wiring is disconnected, shorted or grounded, replace the wiring. 4. Replace the Fuser unit. (Deteriorated sensitivity due to the toner adhered to the center thermistor.)
  Fuser thermistor connect PWB Replace the fuser thermistor connect PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB.
  Fuser thermistor 2 1. Replace the Fuser unit.
  Fuser thermostat (triggered) 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and power source PWB (YC2) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit.
  Power source PWB Replace the power source PWB.

• Code: 6120
• Description: Abnormally high fuser thermistor 1 temperature
  (50/60 ppm model) 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. (40 ppm model) The detection temperature of fuser thermistor 1 is higher than 250°C/482°F. In a heater-off state, the detection temperature of fuser thermistor 1 is higher than 170°C/338°F after the detection temperature of fuser thermistor 1 was 155°C/311°F or less.
• Causes: Connector pin. Triac. Fuser thermistor. Contrl PWB.
• Remedy: Fuser thermistor Replace the fuser unit.
  Contrl PWB Replace the control PWB and check for correct operation.

• Code: 6130
• Description: Broken fuser thermistor 1 wire (50/60 ppm model only)
  A/D value of the fuser thermistor 1 exceeds 1019 bit continuously for 4 s during warming up.
• Causes: Connector cable or poor contact in the connector. Connector pin. Triac. Fuser thermistor. Fuser thermistor connect PWB. Control PWB.
• Remedy: 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 and control PWB (YC21)
  Fuser thermistor Replace the fuser unit.
  Fuser thermistor connect PWB Replace the fuser thermistor connect PWB.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 6400
• Description: Zero-cross signal error
  While fuser heater ON/OFF control is performed, the zerocross signal is not input within 2 s.
• Causes: Fuser unit. Power source PWB. Connect right PWB. Control PWB.
• Remedy: Fuser unit 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Power source PWB and connect right PWB (YC4) Connect right PWB and control PWB (YC29) 2. If the wiring is disconnected, shorted or grounded, replace the wiring.
  Power source PWB Replace the power source PWB.
  Connect right PWB Replace the connect right PWB.
  Control PWB Replace the control PWB.

• Code: 7000
• Description: Toner motor error
  During driving the toner motor, an over-current detection signal is detected at intervals of 10 ms as for 300 accumulation.
• Causes: Connector cable or poor contact in the connector. Drum unit. Connect left PWB. Control PWB.
• Remedy: 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 and drum PWB (YC4) Drum PWB and drum connect PWB (YC1) Drum connect PWB and connect left PWB (YC3) Connect left PWB and control PWB (YC3)
  Drum unit Replace the drum unit.
  Connect left PWB Replace the connect left PWB.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 7100
• Description: Toner sensor error
  Sensor output value of 930 or more continuously for 5 s.
• Causes: Toner sensor. Toner motor. Connect left PWB. Control PWB.
• Remedy: Toner sensor 1. Check the toner sensor output. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Toner sensor and drum PWB (YC3) Drum PWB and drum connect PWB (YC1) Drum connect PWB and connect left PWB (YC3) Connect left PWB and control PWB (YC3) 3. If the wiring is disconnected, shorted or grounded, replace the wiring. 4. Check that the gears of the Developer unit are not damaged and the spiral can rotate. 5. Replace the Developer unit.
  Toner motor 1. Draw out the toner container. 2. Check the drive gear can rotate or they are not unusually loaded and, if necessary, replace. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Toner motor and drum PWB (YC4) Drum PWB and drum connect PWB (YC1) Drum connect PWB and connect left PWB (YC3) Connect left PWB and control PWB (YC3) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the Toner motor.
  Connect left PWB Replace the connect left PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control 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: Connector cable or poor contact in the connector. Toner sensor. Connect left PWB. Control PWB.
• Remedy: 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 and drum PWB (YC3) Drum PWB and drum connect PWB (YC1) Drum connect PWB and connect left PWB (YC3) Connect left PWB and control PWB (YC2)
  Toner sensor Replace the developer unit.
  Connect left PWB Replace the connect left PWB.
  Control PWB Replace the control 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: Connector cable or poor contact in the connector. Toner sensor. Connect left PWB. Control PWB.
• Remedy: 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 and connect left PWB (YC3) Connect left PWB and control PWB (YC2)
  Toner sensor Replace the drum unit.
  Connect left PWB Replace the connect left PWB.
  Control PWB Replace the control PWB and check for correct operation.

• Code: 7800
• Description: Broken temperature sensor wire
  Input from temperature sensor is 1019 or more continuously for 160 ms. Input from temperature sensor is 930 or more continuously for 5 s.
• Causes: Temperature sensor. Control PWB.
• Remedy: Temperature sensor 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Temperature sensor and control PWB (YC30) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the key right PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: 7810
• Description: Short-circuited temperature sensor wire
  Input from temperature sensor is 31 or less continuously for 5 s.
• Causes: Temperature sensor. Control PWB.
• Remedy: Temperature sensor 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Temperature sensor and control PWB (YC30) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the key right PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: 7900
• Description: Drum EEPROM error
  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: DR PWB. Connect left PWB. Control PWB.
• Remedy: DR PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. DR PWB and drum connect PWB (YC1) Drum connect PWB and connect left PWB (YC3) Connect left PWB and control PWB (YC2) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Drum unit.
  Connect left PWB Replace the connect left PWB.
  Control PWB 1. Check the control software and upgrade to the latest, if necessary. 2. Replace the control PWB and check for correct operation.

• Code: F000
• Description: Communication error between Control PWB and Operation PWB
• Causes: Control PWB. Operation PWB.
• Remedy: Control PWB 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Check that the wirings and connetors between the control PWB and the operation panel PWB are normal. Operation PWB and control PWB (YC2002) 3. Check that the DIMM memories in the control PWB are well conducted and, if not, replace. 4. Execute U021initialize memory. 5. Replace the control PWB.
  Operation PWB Replace the operation PWB.

• Code: F010
• Description: Control PWB checksum error
• Causes: Control PWB.
• Remedy: Control PWB Turn the main power switch off/on to restart the machine. If the error is not resolved, replace control PWB and check for correct operation.

• Code: F020
• Description: Control PWB RAM check sum error
• Causes: Main memory (RAM).
• Remedy: Main memory (RAM) Turn the main power switch off/on to restart the machine. If the error is not resolved, replace control PWB and check for correct operation.

• Code: F040
• Description: Communication error between Controller and Print engine
• Causes: Control PWB.
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Repair or replace the wire from the control PWB, that may be grounded. (Check short-circuit between 5V and 3.3V.) 3. Check the control software and upgrade to the latest, if necessary. 4. If not corrected, replace the control PWB and check for correct operation.

• Code: F041
• Description: Communication error between Controller and Scan engine
• Causes: Control PWB.
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Repair or replace the wire from the control PWB, that may be grounded. (Check short-circuit between 5V and 3.3V.) 3. Check the control software and upgrade to the latest, if necessary. 4. If not corrected, replace the control PWB and check for correct operation.

• Code: F050
• Description: Print engine ROM checksum error
• Causes: Control PWB.
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Confirm that the EEPROM has been properly installed. 3. Check the control software and upgrade to the latest, if necessary. 4. If not corrected, Replace the control PWB and check for correct operation.

• Code: F051
• Description: Scan engine ROM checksum error
• Causes: Control PWB
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Confirm that the EEPROM has been properly installed. 3. Check the control software and upgrade to the latest, if necessary. 4. If not corrected, Replace the control PWB and check for correct operation.