OKI MC770 Error Codes list and solutions

OKI MC770 Error Codes list and solutions

– Compatible Printer model: OKI MC770
– OKI MC770 Error Code description:

• Code: C020
• Description: Image drum lock error
• Troubleshooting Guides: The ID does not rotate normally. Does the error display recur when the power is turned off once and back on?
  Check if the ID is installed normally or not. Replace the ID unit. Replace the ID motor.

• Code: C0A1
• Description: Fuser exhaust fan error
• Troubleshooting Guides: Is the fan connector connected normally? Does this error recur?
  Re-connect it normally. Replace the fan motor. Replace the PU board.

• Code: C0A2
• Description: Low voltage power supply fan error
• Troubleshooting Guides: Is the fan (bottom right of the front) of the low voltage power supply block working? Is the fan connector connected normally?
  Check for sure connection of the fan connector. Replace the PU board. Replace the fan motor.

• Code: C0A5
• Description: ID cooling fan error
• Troubleshooting Guides: Is the fan connector connected normally? Does this error recur?
  Re-connect it normally. Replace the fan motor. Replace the PU board.

• Code: C0A6
• Description: Duplex FAN Alarm Caution
• Troubleshooting Guides: Fan error inside the Duplex unit. Does the error recur when the power is turned off once and back on? Does the error recur when the power is turned off once and back on?
  Check if the Duplex unit is installed normally or not. Check if the fans are installed normally or not. Replace the fan.

• Code: C1DA, C1DB
• Description: LCF unit detect error 1 LCF unit detect error 2
• Troubleshooting Guides: Replace the LCF Unit Board

• Code: C260
• Description: Scanner lamp error Lamp error – Exposure adjustment has failed.
• Troubleshooting Guides: Power cycle the unit. If the power cycle does not work to recover from the error, the unit needs repair. The CIS may be damaged.

• Code: C270
• Description: Scanner home position error The home position sensor does not become inactive in the designated period of time – The carriage does not move from the home position in the designated period of time.
• Troubleshooting Guides: Power cycle the unit. If the power cycle does not work to recover from the error, the unit needs repair. The possible cause is the damage of the home position sensor, the belt that moves CIS, or the FB motor.

• Code: C280
• Description: Scanner home position error The home position sensor does not become active in the designated period of time – The carriage does not reach the home position in the designated period of time. The sensor malfunctions.
• Troubleshooting Guides: Power cycle the unit. If the power cycle does not work to recover from the error, the unit needs repair. The possible cause is the damage of the home position sensor, the belt that moves CIS, or the FB motor.

• Code: C291
• Description: Scan position detect error Scan position detect error – The black edge is not detected in scanning.
• Troubleshooting Guides: Power cycle the unit and retry to scan. If the error occurs again in the next scan, the unit needs repair. The calibration sheet may not be installed properly.

• Code: C37A … C37D
• Description: Abnormal temperature of belt C37A: Shortcircuit C37B: Open circuit C37C: High temperature C37D: Low temperature
• Troubleshooting Guides: Is the cable from belt thermistor to the high voltage board connected normally? Does this error recur?
  Re-connect the cables normally. Turn on the power again. Replace the belt thermistsor.

• Code: C3B3 … C383
• Description: Toner sensor detection error. (C3B3=Y, C3A3=M, C393=C, C383=K) This error does not occur with the default settings.
• Troubleshooting Guides: Is the toner cartridge installed? Is the lock lever of the toner set? Does this error recur?
  Install the toner cartridge. Rotate the lock lever of toner to the lock position. Turn on the power again. Replace the toner sensor assembly.

Solve OKI MC770 Error codes

• Code: C3E2
• Description: The fuse has blown out.
• Troubleshooting Guides: Is the belt unit connected normally? Does this error recur?
  Re-install the belt unit. Turn on the power again. After checking for the sure cable connection, replace the PU or Board IBY.

• Code: C3EA … C3ED
• Description: The ID unit fuse has blown out. (C3EA=Y, C3EB=M, C3EC=C, C3ED=K)
• Troubleshooting Guides: Is the ID unit installed normally? Does this error recur? Does the printer recover from the error when the PU/PRZ board is replaced?
  Re-install the ID unit. Turn on the power again. After checking for the sure connection of the cable between PRZ board and PU board, replace the PRZ board. Replace the PU board.

• Code: C41A, C41B
• Description: Short-circuit or opencircuit of fuser thermistor is detected.
• Troubleshooting Guides: Does this error recur? Yes Turn on the power again. Replace the fuser unit.

• Code: C41C
• Description: The backup roller thermistor is detected of its short-circuit. (At high temperature)
• Troubleshooting Guides: Does this error recur? Yes Turn on the power again. Replace the fuser unit.

• Code: C41D
• Description: The backup roller thermistor is detected of its opencircuit. (At low temperature)
• Troubleshooting Guides: Does this error recur? Yes Turn on the power again. Replace the fuser unit.

• Code: C41E
• Description: Compensation Thermistor Error
• Troubleshooting Guides: Is the error message displayed? Does this error recur? Yes Turn on the power again. After leaving a printer for 30 minutes, turn on the power again.

• Code: C449, C446
• Description: The fuser thermistor has detected an abnormal temperature (high temperature or low temperature.)
• Troubleshooting Guides: Does this error recur? Turn on the power again. Replace the fuser unit. Replace the low voltage power supply unit.

• Code: C44A
• Description: Thermistor Slope Error
• Troubleshooting Guides: Is the error message displayed? Does this error recur? Yes Turn on the power again. After leaving a printer for 30 minutes, turn on the power again.

• Code: C468, C466
• Description: The backup roller thermistor has detected an abnormal temperature (high temperature or low temperature.)
• Troubleshooting Guides: Does this error recur? Turn on the power again. Replace the fuser unit. Replace the low voltage power supply unit.

• Code: C46A, C46B
• Description: Compensation Heater Temp high Compensation Heater Temp Low
• Troubleshooting Guides: Turn on the power,after 30min.

• Code: C4C0
• Description: The fuse has blown out.
• Troubleshooting Guides: Is the fuser unit installed normally? Does this error recur?
  After cleaning the connecting connector of the fuser unit, re-install the fuser unit. Turn on the power again. After checking for the sure cable connection, replace the PU or Board IBY.

• Code: C4E3
• Description: Fuser motor lock error
• Troubleshooting Guides: Fuser does not rotate normally. Does this error recur?
  Check if the fuser is installed normally or not. Replace the fuser. Replace the fuser motor.

• Code: C4FA
• Description: Media wrapped around the fuser error
• Troubleshooting Guides: Media has wrapped around the fuser. Turn off the power. Replace the fuser.

• Code: C56A, C56B, C56C, C56D
• Description: Option unit I/F error (C56A=Duplex Unit, C56B=2nd Tray, C56C=3rd Tray C56D=4th Tray)
• Troubleshooting Guides: Does this error recur? Turn on the power again. Check for sure connection of the connectors. Replace the option unit.

• Code: C5A1
• Description: Read/write error of the engine EEPROM is detected.
• Troubleshooting Guides: Does this error recur? Yes Turn off the power of the printer and back on. Replace the PU board.

• Code: C5A2
• Description: Duplex Software Error
• Troubleshooting Guides: Replace the Duplex Unit

• Code: C5A3
• Description: Tray3 Software Error
• Troubleshooting Guides: Change the Tray3 Board

• Code: C5A4
• Description: Tray2 Software Error
• Troubleshooting Guides: Change the Tray2 Board

• Code: C5A5
• Description: Software Error
• Troubleshooting Guides: Change the PU Board

• Code: C5A6
• Description: Tray4 Software Error
• Troubleshooting Guides: Change the Tray4 Board

• Code: C5B0
• Description: Duplex Clock Adjust Error
• Troubleshooting Guides: Change the Duplex

• Code: C5B2, C5B3, C5B4
• Description: Tray-2/3/4 CPU clock frequency error
  C5B2=2nd Tray C5B3=3rd Tray C5B4=4th Tray
• Troubleshooting Guides: Replace the Tray board GOH-11.

• Code: C91A, C91B, C91C
• Description: RFID reader I/F error
  Interface error with the RFID reader is detected. 01: Communication error between the RFID reader and the engine circuit boards. 02: Error in the wireless circuit of the RFID reader 03: Communication error between the RFID reader and the toner cartridge. 04: Error is detected in the RFID toner cartridge. (In more than 4)
• Troubleshooting Guides: 01: Same as the error no. C91D 02: Replace the RFID R/W board. 03: Check for normal connection of the antenna cable. 04: Check if quantity of the toner cartridge is correct or not.

• Code: C91D
• Description: RFID Reader not Installed
• Troubleshooting Guides: RFID read device error Does this error recur?
  Check for normal connection of the RFID R/W board. Replace the RFID R/W. Replace the PU board.

• Code: C921
• Description: AC voltage zero-crossing error
• Troubleshooting Guides: Check the AC voltage. Change the Lowvoltage board or PU board.

• Code: C940
• Description: Engine control logic has an error.
• Troubleshooting Guides: Does this error recur? Yes Turn off the power of the printer and back on. Replace the PU board.

• Code: C96A
• Description: High voltage power supply interface error.
• Troubleshooting Guides: Is the cable connecting the PU board to the high voltage unit connected normally? Have you checked defective contact of contactor points?
  Re-connect them normally. Check for defective contact of the high voltage system. Replace the high voltage power supply.

• Code: C9A0
• Description: Offline stapler error
• Troubleshooting Guides: Change the offline stapler

• Code: CE50
• Description: Environment temperature is abnormal.
• Troubleshooting Guides: Does this error recur? Yes Turn off the power of the printer and back on. Replace the Board MFH.

• Code: CE51
• Description: Environment humidity is abnormal./ Humidity sensor is not connected.
• Troubleshooting Guides: Does this error recur? Yes Turn off the power of the printer and back on. Replace the Board MFH.

• Code: CE52
• Description: Dew condensation of the printer is detected.
• Troubleshooting Guides: This error can easily occur when a printer is brought in to indoor from outdoor. Leave the printer for 2 hours or half day under room temperature, and turn on the power again. Does this error recur?
  Yes After leaving a printer under room temperature, turn on the power again. Replace the Board MFH.

• Code: CE7A
• Description: ID Up/Down position detection error
• Troubleshooting Guides: Is the ID unit caught by anything when it is removed and reinstalled? Does this error recur?
  Re-install the ID unit. Turn on the power again. Replace the high voltage power supply.

• Code: CE82 … CE85
• Description: LED head detection error (CE82=Y, CE83=M, CE84=C, CE85=K)
• Troubleshooting Guides: Is the LED head connected normally? Is the LED HEAD fuse brown? Does this error recur?
  Install the LED head unit normally. Check the LED HEAD fuse. After checking fuse Turn on the power again. For the method of checking the LED head unit fuse

• Code: E01A
• Description: Occur jam and Paper on the Transport Path
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the PU board.

• Code: E01B
• Description: Occur jam around Fuser Unit
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the PU board.

• Code: E02A
• Description: Occur jam and Paper on the Exit Path
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the PU board.

• Code: E061 … E065
• Description: Tray1 check paper size error Tray2 check paper size error Tray3 check paper size error Tray4 check paper size error MP Tray check paper size error
• Troubleshooting Guides: Change the paper size or change the paper in Tray.

• Code: E130
• Description: Occur jam with the Tray1
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Tray1 board.

• Code: E13A
• Description: Tray1 paper remaining
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the PU board.

• Code: E140
• Description: Occur jam with the Tray2
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Tray2 board.

• Code: E14A
• Description: Occur jam and Paper on the Tray2
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Tray2 board.

• Code: E150
• Description: Occur jam with the Tray3
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Tray3 board.

• Code: E15A
• Description: Occur jam and Paper on the Tray3
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Tray3 board.

• Code: E160
• Description: Occur jam with the Tray4
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Tray4 board.

• Code: E16A
• Description: Occur jam and Paper on the Tray3
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Tray4 board.

• Code: E202
• Description: Paper feed jam
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the PU board.

• Code: E20A
• Description: Occur jam and Paper on the Feed Path
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the PU board.

• Code: E400
• Description: Face Up Cover Jam
• Troubleshooting Guides: Change the sensor Lever. Change the cable. Change the relay board or PU board.

• Code: E52A
• Description: Occur Duplex jam and Paper on the Transport Path
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Duplex board.

• Code: E57A
• Description: Occur Duplex jam and Paper on the Entry Path
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Duplex board.

• Code: E58A
• Description: Occur Duplex jam and Paper on the Reversal Path
• Troubleshooting Guides: Take out the jammed paper. Change the sensor Lever. Change the Duplex board.

• Code: E711
• Description: ADF document jam. Jam due to non-arrival at the hopping sensor – After paper feeding is started, the hopping sensor does not become active. (Simplex and Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E712
• Description: ADF document jam Jam due to non-arrival at the regist paper sensor – After feeding for a simplex document scan is started, the regist paper sensor does not become active. (Simplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E713
• Description: ADF document jam Jam due to non-arrival at the reverse paper sensor – After feeding for a duplex document scan is started, the reverse paper sensor does not become active. (Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E714
• Description: ADF document jam Jam due to document removal – In the middle of feeding for a simplex document scan, the document set sensor becomes inactive. (Simplex and Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E715
• Description: ADF document jam Activation of the hopping sensor at document reversal – The hopping sensor becomes active when the reverse paper sensor is inactive. Multifeed of documents is detected. (Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E721
• Description: ADF document jam Jam due to non-arrival at the scan sensor – Although the fed document is transferred to a certain distance, the scan sensor does not become active. (Simplex and Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E722
• Description: ADF document jam Regist paper sensor stuck jam/detection of out-of-spec oversized documents – Once the regist paper sensor becomes active, it does not become inactive when the fed document is transferred to the distance exceeding the maximum page size. (Simplex and Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E723
• Description: ADF document jam Detection of out-of-spec undersized documents – Once the regist paper sensor becomes active, it becomes inactive before the fed document is transferred by the distance equal to the minimum page size. (Simplex and Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E724
• Description: ADF document jam Scan sensor stuck jam – The scan sensor does not become inactive even when the fed document is transferred by 60mm after the regist paper sensor becomes inactive. (Simplex and Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E725
• Description: ADF document jam Detection of a too little space between documents – Before the document is transferred by 31mm after the regist paper sensor becomes inactive, the sensor becomes active. Detection of a too little space between the documents. (Simplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E726
• Description: ADF document jam Activation of the reverse paper sensor for the documents not to be reversed – Switching to the first separator is not carried out normally causing activation of the reverse paper sensor. (Simplex and Duplex) • The reverse paper sensor becomes active in feeding of a simplex document. • The reverse paper sensor becomes active between reversal to the back and activation of the regist paper sensor.
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E727
• Description: ADF document jam Activation of a sensor at an unintended timing – The scan sensor, regist paper sensor, hopping sensor or reverse paper sensor becomes active at an unintended timing. (Simplex and Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E728
• Description: ADF document jam Detection of chattering of a sensor – Chattering of a sensor is detected. Once a sensor becomes active, the sensor becomes inactive in 5mm feeding of the document. Then the inactive sensor becomes active in the next 5mm feeding. (Simplex and Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E741
• Description: ADF document jam Reverse paper sensor stuck jam/ detection of out-of-spec oversized documents – The reverse paper sensor does not become inactive when the document is transferred to the distance exceeding the maximum page size. (Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E742
• Description: ADF document jam Detection of out-of-spec undersized documents – The reverse paper sensor becomes inactive before the document is transferred by the distance equal to the minimum page size. (Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E743
• Description: ADF document jam Non-arrival at the regist paper sensor at reversing to the front – After reversing to the front, the regist paper sensor does not become active in a lapse of a certain period of time. (Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E744
• Description: ADF document jam Non-arrival at the regist paper sensor at reversing to the back – When the document is transferred following reversal to the back, the regist paper sensor does not become active. (Duplex)
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E778
• Description: ADF document jam Remaining document detection at power on – A sensor other than the document set sensor becomes active when the power is turned on or the cover is opened and closed during operation.
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E779
• Description: ADF document jam Activation of only the document set sensor – Only the document set sensor becomes active at initialization of the ADF stopper gate.
• Troubleshooting Guides: Open the ADF cover, remove every jammed document from the paper feed path, and close the ADF cover.

• Code: E870
• Description: ADF document jam ADF open jam – A document jam is caused by opening of the ADF while the RADF is operating.
• Troubleshooting Guides: Remove every jammed document from the paper feed path, and close the ADF cover.

• Code: F031
• Description: Duplex unit for other model is detected.
• Troubleshooting Guides: Is the Duplex unit for that specific model installed? No Install the correct duplex unit.

• Code: F032
• Description: 3rd tray for other model is detected.
• Troubleshooting Guides: Is the 3rd tray for that specific model installed? No Install the correct 3rd tray.

• Code: F033
• Description: 2nd tray for other model is detected.
• Troubleshooting Guides: Is the 2nd tray for that specific model installed? No Install the correct 2nd tray.

• Code: F034
• Description: Tray4 version error
• Troubleshooting Guides: Change the Tray4 board

• Code: F03A … F03D
• Description: Detection of an unsupported toner cartridge.
  An unsupported toner cartridge has been detected. F03A:Black toner cartridge position F03B:Yellow toner cartridge position F03C:Magenta toner cartridge position F03D:Cyan toner cartridge position
• Troubleshooting Guides: Replace it with an appropriate toner cartridge.

• Code: F041
• Description: Over than available setting number tray detection error
• Troubleshooting Guides: Over than available setting number tray is installed. Remove the available setting number tray.

• Code: F042
• Description: Error due to detection of the toner cartridges of the same color
• Troubleshooting Guides: Two or more toner cartridges of the same color are detected. Install the cartridge of the specified in the specified position.

• Code: F072
• Description: PU Flash Error
• Troubleshooting Guides: Change the PU board

• Code: F110
• Description: Communication error between system CPU and Scanner CPU System CPU – Scanner CPU communication error
• Troubleshooting Guides: If the error occurs frequently, check for the proper connection between the CU PCB and the SU PCB.

• Code: F111
• Description: Scanner response anomaly
• Troubleshooting Guides: Scanner response anomaly The SU PCB, the scanner or the scanner firmware may have some problems.

• Code: F112
• Description: Controller response anomaly
• Troubleshooting Guides: CU-PU communication error detected by the scanner If the error occurs frequently, check for the proper connection between the CU PCB and the SU PCB.

• Code: F113
• Description: Scanner CPU exception
• Troubleshooting Guides: Anomalous program on the scanner side The SU PCB, the scanner or the scanner firmware may have some problems.

• Code: F114
• Description: Scanner CPU exception
• Troubleshooting Guides: CPU exception on the scanner side The SU PCB, the scanner or the scanner firmware may have some problems.

– Get more information about Epson XP 15000 troubleshooting, click here

– Get more error code list with quick guide to fix printer product, click here
– About get help with reseting Epson inkpad or others, click here

Waste Ink Pad Counter Utility Functions:

– Cleaning printhead.
– Ink charge.
– Fix Epson red lights blinking Error

– Fix Epson Service Required Error: A printer’s ink pad at the end of its service life Please contact Epson Support.

– Check the current value of waste ink counters and ink level counters.
– Clear Waste Ink Counters.
– Read and write serial number.
– Read and write USB ID.
– Read and write HEAD ID.
– Make EEPROM dump, backup.
– Paper feed test.
– Nozzle check.
– Color check pattern.
– Initialize (disable) PF deterioration offset.
– Retrieve device information

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