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

• Code: C0210
• Description: CPU communication problem
  • Synchronization cannot be taken between the main CPU and engine CPU.
• Causes: Defective main PWB.
  Poor contact in the connector terminals.
  Defective engine PWB.
• Remedy: Defective main PWB. Replace the main PWB.
  Poor contact in the connector terminals. Check the connection of connector YC1 on the main PWB and YC1 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective engine PWB. Replace the engine PWB.

• Code: C0220
• Description: CPU communication problem
  • Synchronization cannot be taken between the main CPU and scanner CPU.
• Causes: Defective main PWB.
  Poor contact in the connector terminals.
  Defective scanner PWB.
• Remedy: Defective main PWB. Replace the main PWB.
  Poor contact in the connector terminals. Check the connection of connector YC2 on the engine PWB and YC5 on the scanner PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective scanner PWB. Replace the scanner PWB.

• Code: C0240
• Description: Printer board* communication problem
  • The printer board does not respond 120 seconds after the power is turned on.
• Causes: Poor contact in the connector terminals.
  DIMM installed incorrectly.
  Defective main PWB or printer board.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC9 on the main PWB and YC5 on the printer board, and the continuity across the connector terminals. Repair or replace if necessary.
  DIMM installed incorrectly. Check the connection. Repair or replace if necessary.
  Defective main PWB or printer board. Replace the main PWB or printer board and check for correct operation.

• Code: C0250
• Description: Network scanner board* communication problem
  • The response to the alive command to the network scanner transmitted once to 30 s does not come on the contrary three consecutive times or more.
  • The response to the communication command transmitted to the network scanner does not return 75 s or more.
• Causes: Poor contact in the connector terminals.
  Defective main PWB or network scanner board.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC3 on the main PWB and the connector on the network scanner board, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective main PWB or network scanner board. Replace the main PWB or network scanner board and check for correct operation.

• Code: C0330
• Description: Relay board communication problem
• Causes: Poor contact in the connector terminals.
• Remedy: Check the connection of connector YC26 on the main PWB and relay board, and the continuity across the connector terminals. Repair if necessary. If the problem is not solved, run maintenance item U935 and return the relay board to the Service Administrative Division.

• Code: C0410
• Description: DP communication problem
  • There is no reply after 5 retries at communication or a communication error occurs.
• Causes: Poor contact in the connector terminals.
  Defective DP main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the scanner PWB and YC1 on the DP main PWB, and the continuity across the connector terminals. Repair or replace if necessary
  Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: C0420
• Description: Side feeder* communication error
  • A communication error from side feeder is detected 10 times in succession.
• Causes: Poor contact in the connector terminals.
  Defective engine PWB.
  Defective side feeder main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC15 on the engine PWB and the connector YC3 on the side feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective engine PWB. Replace the engine PWB.
  Defective side feeder main PWB. Replace the side feeder main PWB.