• Code: C8440
• Description: Sensor adjusting problem (optional document finisher) The sensor cannot be adjusted within the specified range.
• Causes: The paper entry sensor connector makes poor contact. Defective paper entry sensor. The optical path of the paper entry sensor is blocked by foreign matter. Defective finisher main PWB.
• Remedy: The paper entry sensor connector makes poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
  Defective paper entry sensor. Replace the paper entry sensor and check for correct operation.
  The optical path of the paper entry sensor is blocked by foreign matter. Remove the foreign matter.
  Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8460
• Description: EEPROM problem (optional document finisher) Reading from or writing to EEPROM cannot be performed.
• Causes: Defective EEPROM or finisher main PWB.
• Remedy: Defective EEPROM or finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C9000
• Description: Optional DP communication problem A communication error is detected.
• Causes: Poor contact in the connector terminals. Defective DP main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC24 and YC31 on the engine PWB and the connector of the DP, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: C9060
• Description: DP EEPROM error (optional DP) Read and write data does not match. Data in the specified area of the backup memory does not match the specified values.
• Causes: Defective DP main PWB. Device damage of EEPROM.
• Remedy: Defective DP main PWB. Replace the DP main PWB and check for correct operation.
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: F000
• Description: Operation panel PWB communication error
• Causes: Defective main PWB. Defective operation panel PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.
  Defective operation panel PWB. Replace the operation panel PWB and check for correct operation.

• Code: F010
• Description: Main PWB checksum error
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.

• Code: F020
• Description: Memory checksum error
• Causes: Defective main PWB. Defective expansion memory.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.
  Defective expansion memory. Replace the expansion memory and check for correct operation.

• Code: F030
• Description: Main PWB system error
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.