• Code: C0860
• Description: Fax control PWB software switch checksum error
  A checksum error occurred with the software switch value of the fax control PWB.
• Causes: Defective fax software.
  Defective fax control PWB.
• Remedy: Defective fax software. Install the fax software.
  Defective fax control PWB. Replace the fax control PWB and verify the operation.

• Code: C0870
• Description: Fax control PWB to main PWB high capacity data transfer problem
  High-capacity data transfer between the fax control PWB and the main PWB of the machine was not normally performed even if the data transfer was retried the specified times.
• Causes: Poor contact in the connector terminals.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
  Defective PWB. Replace the fax control PWB or main PWB and check for correct operation.

• Code: C0880
• Description: Fax control PWB program archive problem (optional fax)
  When power is turned on, the compressed program in the Flash ROM on the fax control PWB was not successfully decompressed.
• Causes: Defective fax control PWB.
• Remedy: Replace the fax control PWB and verify the operation.

• Code: C0890
• Description: Fax control PWB CG FONT archive problem (optional fax)
  When power is turned on, the compressed CG font in the Flash ROM on the fax control PWB was not successfully decompressed.
• Causes: Defective fax control PWB.
• Remedy: Replace the fax control PWB and verify the operation.

• Code: C0900
• Description: Fax software incompatibility detection problem
  Version of fax software is not compatible with that of main software.
• Causes: Fax software version or main software is earlier.
• Remedy: Check the version of the fax software and the main software, upgrade the version to the compatible software.

• Code: C0920
• Description: Fax file system error
  The backup data is not retained for file system abnormality of flash memory of the fax control PWB.
• Causes: Defective fax control PWB.
• Remedy: Replace the fax control PWB and verify the operation.

• Code: C2000
• Description: Drive motor problem
  A stable state does not continue for 1 s from 1 s after the drive motor is activated.
• Causes: Poor contact in the connector terminals.
  Defective drive transmission system.
  Defective engine PWB.
  Defective drive motor.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the engine PWB and the connector on the drive motor, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective engine PWB. Replace the engine PWB and check for correct operation.
  Defective drive motor. Replace the drive motor.

• Code: C2200
• Description: Drum motor problem
  A stable state does not continue for 1 s from 1 s after the drum motor is activated.
• Causes: Poor contact in the connector terminals.
  Defective drive transmission system.
  Defective engine PWB.
  Defective drum motor.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the engine PWB and the connector on the drum motor, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective engine PWB. Replace the engine PWB and check for correct operation.
  Defective drum motor. Replace the drum motor.