• Code: C8910
• Description: Backup memory data 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: C8930
• Description: Backup memory data 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: C9010
• Description: Coin vender communication error
  A communication error from coin vender is detected 10 times in succession.
• Causes: Poor contact in the connector terminals.
  Data setting failure.
  Defective coin vender control PWB.
  Defective main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the main PWB and the connector on the coin vender control PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Data setting failure. Set maintenance mode U206 to off when a coin vender is not installed.
  Defective coin vender control PWB. Replace the coin vender control PWB.
  Defective main PWB. Replace the main 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.

• 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 driver PWB. Replace the DP driver PWB and check for correct operation.
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: C9070
• Description: Communication problem between DP and SHD (optional DP)
  A communication error is detected.
• Causes: Loose connection of the SHD PWB.
  Defective SHD PWB.
• Remedy: Loose connection of the ISC PWB. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
  Defective ISC PWB. Replace the ISC PWB and check for correct operation.