• Code: 7412
• Description: Drum unit C non- installing error
  The EEPROM of drum PWB C does not communicate normally.
• Causes: Installation of incompatible drum unit C. Defective connector cable or poor contact in the connector. Defective drum PWB C. Defective engine PWB.
• Remedy: Installation of incompatible drum unit C. Install drum unit C compatible with the specifications to the machine.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum unit C and Drum relay PWB (YC4) Drum relay PWB (YC1) and engine PWB (YC34)
  Defective drum PWB C. Replace the drum unit C.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7413
• Description: Drum unit M non- installing error
  The EEPROM of drum PWB M does not communicate normally.
• Causes: Installation of incompatible drum unit M. Defective connector cable or poor contact in the connector. Defective drum PWB M. Defective engine PWB.
• Remedy: Installation of incompatible drum unit M. Install drum unit M compatible with the specifications to the machine.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum unit M and Drum relay PWB (YC3) Drum relay PWB (YC1) and engine PWB (YC34)
  Defective drum PWB M. Replace the drum unit M.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 7414
• Description: Drum unit Y non- installing error
  The EEPROM of drum PWB Y does not communicate normally.
• Causes: Installation of incompatible drum unit Y. Defective connector cable or poor contact in the connector. Defective drum PWB Y. Defective engine PWB.
• Remedy: Installation of incompatible drum unit Y. Install drum unit Y compatible with the specifications to the machine.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum unit Y and Drum relay PWB (YC5) Drum relay PWB (YC1) and engine PWB (YC34)
  Defective drum PWB Y. Replace the drum unit Y.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 9530
• Description: Backup data error
  The serial number of the machine written on the EEPROM of the engine PWB differs with that is written on both the flash memory of the engine PWB and the EEPROM of the drum PWB as a backup.
• Causes: Replacing both the engine PWB and the drum unit at the same time.
• Remedy: Check that the machine operates properly by reverting the engine controller and the drum unit to the old ones. To replace the engine PWB and the drum unit at the same time, turn on the machine after replacing either one. Check that the machine operates properly and then turn off the machine. Replace the other and turn on the machine to check that the machine operates properly. Be sure to replace one by one.

• Code: F000
• Description: Main PWB - operation panel PWB communication error
• Causes: Defective main PWB. Defective operation panel PWB.
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.
  Defective operation panel PWB. Replace the operation panel PWB and check for correct operation.

• Code: F010
• Description: Main PWB checksum error
• Causes: Defective main PWB.h
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.

• Code: F020
• Description: Main PWB RAM checksum error
• Causes: Defective main memory (RAM) on the main PWB. Defective expanded memory (DIMM).
• Remedy: Defective main memory (RAM) on the main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.
  Defective expanded memory (DIMM). Replace the expanded memory (DIMM).

• Code: F040
• Description: Main PWB - print engine communication error
• Causes: Defective main PWB. Defective engine PWB.
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.
  Defective engine PWB. Replace the engine PWB and check for correct operation.