• Code: C8800
• Description: Document finisher communication error (optional 3000-sheet document finisher)
  A communication error from document finisher is detected 10 times in succession.
• Causes: Poor contact in the connector terminals.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective PWB. Replace the finisher main PWB or engine PWB and check for correct operation.

• Code: C8900
• Description: Finisher backup problem (optional 3000-sheet document finisher)
  Read and write data does not match 3 times in succession.
• Causes: Poor contact in the connector terminals.
  EEPROM installed incorrectly.
  Defective finisher main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the finisher main PWB and the connector of the machine, and the continuity across the connector terminals. Repair or replace if necessary.
  EEPROM installed incorrectly. Install EEPROM correctly.
  Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: C8910
• Description: Punch backup problem (optional of 3000-sheet document finisher)
  Read and write data does not match 3 times in succession.
• Causes: Poor contact in the connector terminals.
  Defective punch PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the punch PWB and the connector YC4 on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective punch PWB. Replace the punch PWB and check for correct operation.

• Code: C8920
• Description: Mailbox backup problem (optional mailbox of 3000-sheet document finisher)
  Read and write data does not match.
• Causes: Poor contact in the connector terminals.
  Defective mailbox main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the mailbox main PWB and the connector YC7 on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective mailbox main PWB. Replace the mailbox main PWB and check for correct operation.

• Code: C8930
• Description: Center-folding backup problem (optional center-folding unit of 3000sheet document finisher)
  Read and write data does not match 3 times in succession.
• Causes: Poor contact in the connector terminals.
  EEPROM installed incorrectly.
  Defective centerfold main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the centerfold main PWB and the connector YC5 on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  EEPROM installed incorrectly. Install EEPROM correctly.
  Defective centerfold main PWB. Replace the centerfold main PWB and check for correct operation.

• Code: C9000
• Description: DP communication problem (optional DP)
  A communication error is detected.
• Causes: Poor contact in the connector terminals.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the ISM PWB and the connector of the DP, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective PWB. Replace the DP driver PWB or ISM PWB and check for correct operation.

• Code: C9040
• Description: DP lift motor going up error (optional DP) The tray upper limit switch does not turn on within 2 s of DP lift motor turning on.
• Causes: Loose connection of the DP lift motor connector.
  Malfunction of the DP lift motor.
  Loose connection of the tray upper limit switch connector.
  Malfunction of the tray upper limit switch.
  Defective DP driver PWB.
• Remedy: Loose connection of the DP lift motor connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
  Malfunction of the DP lift motor. Replace the DP lift motor and check for correct operation.
  Loose connection of the tray upper limit switch connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
  Malfunction of the tray upper limit switch. Replace the tray upper limit switch and check for correct operation.
  Defective DP driver PWB. Replace the DP driver PWB and check for correct operation.

• Code: C9050
• Description: DP lift motor going down error (optional DP)
  The tray lower limit switch does not turn on within 2 s of DP lift motor turning on.
• Causes: Loose connection of the DP lift motor connector.
  Malfunction of the DP lift motor.
  Loose connection of the tray lower limit switch connector.
  Malfunction of the tray lower limit switch.
  Defective DP driver PWB.
• Remedy: Loose connection of the DP lift motor connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
  Malfunction of the DP lift motor. Replace the DP lift motor and check for correct operation.
  Loose connection of the tray lower limit switch connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
  Malfunction of the tray lower limit switch. Replace the tray lower limit switch and check for correct operation.
  Defective DP driver PWB. Replace the DP driver PWB and check for correct operation.