• Code: 0100
• Description: Backup memory read/write error
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB.

• Code: 0110
• Description: Backup memory data error
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB.

• Code: 0120
• Description: MAC address data error
  For data in which the MAC address is invalid.
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB.

• Code: 0150
• Description: Engine PWB (EEPROM) error
  Data read from EEPROM is judged abnormal.
• Causes: Improper installation EEPROM. Defective engine PWB.
• Remedy: Improper installation EEPROM. Replace the engine PWB.
  Defective engine PWB. Replace the engine PWB.

• Code: 0170
• Description: Billing counting error
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB.

• Code: 0420
• Description: Paper feeder communication error
  Communication error between engine PWB and optional paper feeder.
• Causes: Improper installation paper feeder. Defective harness between PF main PWB (YC3, YC5) and paper feeder interface connector, or improper connector insertion. Defective PF main PWB. Defective harness between engine PWB (YC33) and paper feeder interface connector, or improper connector insertion. Defective engine PWB.
• Remedy: Improper installation paper feeder. Follow installation instruction carefully again.
  Defective harness between PF main PWB (YC3, YC5) and paper feeder interface connector, or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness. (Refer to the service manual for the paper feeder).
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).
  Defective harness between engine PWB (YC33) and paper feeder interface connector, or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
  Defective engine PWB. Replace the engine PWB.

• Code: 0600
• Description: Expanded memory (DIMM) installing error
  The expansion memory modules (DIMM) are not correctly mounted.
• Causes: Improper installation expanded memory (DIMM).
• Remedy: Improper installation expanded memory (DIMM). Check the installation of the expanded memory (DIMM) and remedy if necessary.

• Code: 0610
• Description: Expanded memory (DIMM) error
  The expansion memory modules (DIMM) mounted on the main PWB does not operate correctly.
• Causes: Defective expanded memory (DIMM). Defective main PWB.
• Remedy: Defective expanded memory (DIMM). Replace the expanded memory (DIMM).
  Defective main PWB. Replace the main PWB.