Code :

Code: C8500
Description: Mailbox communication error (optional mailbox of 3000-sheet document finisher) Communication with the mailbox is not possible although the connection is detected.
Causes: Poor contact in the connector terminals. Defective PWB.
Remedy: Poor contact in the connector terminals. Check the connection of the connector of the mailbox and the connector YC7 on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the mailbox main PWB or finisher main PWB and check for correct operation.

Code: C8510
Description: Mailbox drive motor problem (optional mailbox of 3000-sheet document finisher) The motor lock signal is detected above 500 ms during driving the mailbox drive motor.
Causes: Poor contact in the connector terminals. Defective mailbox drive motor. Defective PWB.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC2 on the mailbox main PWB and the connector of the mailbox drive motor, and the continuity across the connector terminals. Repair or replace if necessary. Defective mailbox drive motor. Replace the mailbox drive motor. Defective PWB. Replace the mailbox main PWB or finisher main PWB and check for correct operation.

Code: C8900
Description: Backup memory data problem (optional 3000-sheet document finisher) Read and write data does not match 3 times in succession.
Causes: Poor contact in the connector terminals. 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. Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

Code: C8910
Description: Backup memory data problem (optional 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: Backup memory data problem (optional mailbox of 3000-sheet document finisher) Read and write data does not match 3 times in succession.
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: Backup memory data problem (optional centerfold unit of 3000-sheet document finisher) Read and write data does not match 3 times in succession.
Causes: Poor contact in the connector terminals. 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. Defective centerfold main PWB. Replace the centerfold main PWB and check for correct operation.

Code: C9060
Description: EEPROM problem (optional DP) Read and write data does not match.
Causes: Poor contact in the connector terminals. Defective DP drive PWB.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC7 on the scanner PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective DP drive PWB. Replace DP drive PWB and check for correct operation.