• Code: C0280
• Description: Abnormal communication between MMI and fax board • Any key request command cannot be normally received from the fax board. • The READY signal cannot be normally received from the fax board.
• Causes: Poor contact in the connector terminals. Defective scanner main PCB or fax board.
• Remedy: Check the connection of connector CN26 on the scanner main PCB and the connector on the fax board. Repair or replace if necessary. Replace the scanner main PCB or fax board and check for correct operation.

• Code: C0290
• Description: Communication problem between the scanner main PCB and fax board • The status cannot be normally received even if the fax board has retried command transmission 100 times.
• Causes: Poor contact in the connector terminals. Defective scanner main PCB or fax board.
• Remedy: Check the connection of connector CN26 on the scanner main PCB and the connector on the fax board. Repair or replace if necessary. Replace the scanner main PCB or fax board and check for correct operation.

• Code: C0440
• Description: Document finisher communication problem • The microcomputer of scanner main PCB does not commnunicate to the document Document finisher. No communication: there is no reply after 3 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
• Causes: Poor contact in the connector terminals. Defective scanner main PCB. Defective finisher main PCB.
• Remedy: Check the connection of connectors CN42 on the scanner main PCB and CN2 on the finisher main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the scanner main PCB and check for correct operation. Replace the finisher main PCB and check for correct operation.

• Code: C0460
• Description: Duplexer communication problem • The microcomputer of engine controller PCB does not commnunicate to the document Document finisher. No communication: there is no reply after 3 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
• Causes: Poor contact in the connector terminals. Defective engine controller PCB. Defective paper feeder/options relay PCB.
• Remedy: Check the connection of connectors YC29 on the engine controller PCB and on the paper feeder/options relay PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the engine controller PCB and check for correct operation. Replace the paper feeder/options relay PCB and check for correct operation.

• Code: C0600
• Description: DIMM problem • The DIMM on the scanner main PCB does not operate correctly.
• Causes: DIMM installed incorrectly. Defective DIMM.
• Remedy: Check if the DIMM is inserted into the socket on the scanner main PCB correctly. Replace the DIMM and check for correct operation.

• Code: C0610
• Description: Bitmap problem • The available memory is judged to be 128 MB or less.
• Causes: Defective scanner main PCB.
• Remedy: Replace the scanner main PCB 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 scanner main PCB.
• Remedy: Replace the scanner main PCB and check for correct operation.

• Code: C0640
• Description: Hard disk problem • The hard disk cannot be accessed.
• Causes: Defective scanner main PCB. Defective hard disk.
• Remedy: Replace the scanner main PCB and check for correct operation. Replace the hard disk device and check for correct operation.