• Code: C57
• Description: Communication error between main CPU and IPC board
• Remedy: Is the connector between the LGC board and IPC board connected inadequately? Reconnect the connecter. Is the conductor pattern on the IPC board short- or open-circuited? Replace the IPC board. Replace the LGC board.

• Code: C58
• Description: Communication error between IPC board and finisher
• Remedy: Is a specified finisher used? Replace to the specified finisher. Is the harness between the IPC board and finisher control board open-circuited? Replace the harness. Is the conductor pattern on the IPC board is short- or open-circuited? Replace the IPC board. Replace the finisher control board.

• Code: C59
• Description: Communication error between main CPU and laser CPU
• Remedy: (1) Check if the harness between the LGC board and PLG board is not disconnected or open-circuited. (2) Check if the conductor pannern around IC13, IC25, IC57, J327 and J342 on the LGC board is not short- or open-circuited. (3) Check if the conductor pattern around IC4, IC19 and J202 on the PLG board is not short- or opencircuited. (4) Replace the LGC board. (5) Replace the PLG board.

• Code: C73
• Description: EEPROM initialization error
• Remedy: (1) Check the ADF board, mainly IC13, for short- and open-circuits. (2) Replace the ADF board. (3) Perform the "Automatic adjusment of RADF sensor and EEPROM initialization" and "Adjusment of the tray width sensor".

• Code: C82
• Description: Read sensor adjustment error
• Remedy: Is there any extraneous material between the read sensor and reflective mirror? Remove the extraneous material. Is the reflective mirror tainted? Clean up the mirror. Is the conductor pattern around IC6, IC11 and CN11 on the ADF board short- or open-circuited? 1. Replace the ADF board. 2. Perform the EEPROM initialization of RADF, sensor automatical adjustment and tray width sensor adjustment. 1. Replace the read sensor. 2. Perform the EEPROM initialization of RADF, sensor automatical adjustment and tray width sensor adjustment.

• Code: C83
• Description: Original length sensor adjustment error
• Remedy: Is there any extraneous material between the original length sensor and reflective mirror? Remove the extraneous material. Is the reflective mirror tainted? Clean up the mirror. Is the conductor pattern around IC6, IC11 and CN15 on the ADF board short- or open-circuited? 1. Replace the ADF board. 2. Perform the EEPROM initialization of RADF, sensor automatical adjustment and tray width sensor adjustment. 1. Replace the original length sensor. 2. Perform the EEPROM initialization of RADF, sensor automatical adjustment and tray width sensor adjustment.

• Code: C84
• Description: Small original reverse sensor adjustment error
• Remedy: Is there any extraneous material between the small original reverse sensor and reflective mirror? Remove the extraneous material. Is the reflective mirror tainted? Clean up the mirror. Is the conductor pattern around IC6, IC11 and CN16 on the ADF board short- or open-circuited? 1. Replace the ADF board. 2. Perform the EEPROM initialization of RADF, sensor automatical adjustment and tray width sensor adjustment. 1. Replace the small original reverse sensor. 2. Perform the EEPROM initialization of RADF, sensor automatical adjustment and tray width sensor adjustment.

• Code: C85
• Description: Abnormal tray lift motor
• Remedy: Is the lifting tray lifted when originals are set on the feeding tray? Is the loading of the lifting tray normal? Adjust the mechanical loading. Remove, if any, extraneous materials. Is the power voltage for CN5-5 and CN6 on the ADF board 24V? 1. Replace the ADF board. 2. Perform the EEPROM initialization of RADF, sensor automatical adjustment and tray width sensor adjustment. Replace the lifting tray motor. Is the upper limit sensor working properly when the lifting tray is lifted? Replace the upper limit sensor. Is the lifting tray lowered when originals are removed from the original tray? Is the loading of the lifting tray normal? Adjust the mechanical loading. Remove, if any, extraneous materials. 1. Replace the lower limit sensor. 2. Replace the ADF board. 3. Perform the EEPROM initialization of RADF, sensor automatical adjustment and tray width sensor adjustment.