• Code: C0440
• Description: Document finisher communication problem
  • A communication error from document finisher is detected 10 times in succession.
• Causes: Poor contact in the connector terminals.
  Defective engine PWB.
  Defective finisher main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC14 on the engine PWB and YC4 on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective engine PWB. Replace the engine PWB.
  Defective finisher main PWB. Replace the finisher main PWB.

• Code: C0460
• Description: Duplex unit communication problem
  • A communication error from duplex section is detected 10 times in succession.
• Causes: Poor contact in the connector terminals.
  Defective engine PWB.
  Defective duplex PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC2 on the engine PWB and YC2 on the duplex PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective engine PWB. Replace the engine PWB.
  Defective duplex PWB. Replace the duplex PWB.

• Code: C0500
• Description: Paper feed unit communication error (cassette 1 and 2)
  • A communication error is detected 10 times in succession.
• Causes: Poor contact in the connector terminals.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC3 on the engine PWB and YC2 on the deck PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective engine PWB. Replace the engine PWB.

• Code: C0510
• Description: Paper feed unit communication error (cassette 3 and 4)
  • A communication error is detected 10 times in succession.
• Causes: Poor contact in the connector terminals.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC4 on the engine PWB and YC2 on the cassette PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective engine PWB. Replace the engine PWB.

• Code: C0610
• Description: Bitmap problem
  • The DIMM on the scanner main PWB does not operate correctly.
• Causes: Defective main PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: C0630
• Description: DMA problem
  • DMA transmission of compressed, decompressed, rotated, relocated or blanked-out image data does not complete within the specified period of time.
• Causes: Defective main PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: C0640
• Description: Hard disk problem
  • The hard disk cannot be accessed.
• Causes: Poor contact in the connector terminals.
  Defective hard disk.
  Defective main PWB.
  Defective cable.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC11 on the engine PWB and the hard disk, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective hard disk. Run U906 (Resetting partial operation control) to cancel partial operation control. Run U024 (HDD formatting) without turning the power off to initialize the hard disk. Replace the hard disk drive and check for correct operation if the problem is still detected after initialization.
  Defective main PWB. Replace the main PWB and check for correct operation.
  Defective cable. Replace cable of the hard disk.

• Code: C0700
• Description: Side feeder EEPROM error
  • An error occurs in EEPROM (U4) data read or write for the side feeder main PWB.
• Causes: Defective side feeder main PWB.
• Remedy: Replace the side feeder main PWB.