• Code: C0150
• Description: Backup memory (EEPROM) device problem (Engine PWB) Reading from or writing to EEPROM cannot be performed.
• Causes: Defective engine PWB. Device damage of EEPROM.
• Remedy: Defective engine PWB. Replace the engine PWB and check for correct operation.
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: C0160
• Description: Backup memory (EEPROM) data problem (Engine PWB) Reading data from EEPROM is abnormal. Read and write data does not match 5 times continuously.
• Causes: Problem with the backup memory data. Defective engine PWB.
• Remedy: Problem with the backup memory data. Run maintenance item U022 to initialize the backup memory data.
  Defective engine PWB. If the C0160 is displayed after initializing the backup memory, replace the engine PWB and check for correct operation.

• Code: C0170
• Description: Copy counts problem A checksum error is detected in the main and engine backup memories for the copy counters.
• Causes: Data damage of EEPROM. Defective PWB.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.
  Defective PWB. Replace the main PWB or engine PWB and check for correct operation.

• Code: C0180
• Description: Machine number mismatch error Machine number of main PWB and engine PWB does not match.
• Causes: Data damage of EEPROM.
• Remedy: Data damage of EEPROM. Contact the Service Administrative Division.

• Code: C0210
• Description: CPU communication problem There is no reply after 3 retries at communication.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of the engine PWB and main PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective PWB. Replace the engine PWB or main PWB and check for correct operation.

• Code: C0240
• Description: Printer PWB communication problem The printer PWB does not respond 120 s after the power is turned on.
• Causes: Poor contact in the connector terminals. DIMM or DDR installed incorrectly. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of the interface PWB and the printer PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  DIMM or DDR installed incorrectly. Check the connection of DIMM or DDR. Repair or replace if necessary.
  Defective PWB. Replace the printer PWB or engine PWB and check for correct operation.

• Code: C0280
• Description: Communication problem between the fax control PWB and main PWB After main PWB status change signal turns on 3 minute, when it does not receive key required command from the fax control PWB, one time it resets the FAX. After that, while main PWB status change signal turns on furthermore 1 minute, when it does not receive key required command from the fax control PWB. When FAX_READY signal continues fake for 6 s, one time it resets the FAX. After that, when FAX_READY fake continues fake for 6 s.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of the main PWB and the fax control PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective PWB. Replace the fax control PWB or main PWB and check for correct operation.

• Code: C0320
• Description: Power CPU communication problem The engine PWB and the power CPU are unable to communicate with each other.
• Causes: Defective engine PWB.
• Remedy: Defective engine PWB. Replace the engine PWB and check for correct operation.