• Code: C0610
• Description: Bitmap problem The DIMM on the main PWB does not operate correctly.
• Causes: Defective main PWB. DDR on the main PWB installed incorrectly.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation. DDR on the main PWB installed incorrectly. Check the connection. Repair or replace if necessary.

• 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. DDR on the main PWB installed incorrectly.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation. DDR on the main PWB installed incorrectly. Check the connection. Repair or replace if necessary.

• Code: C0640
• Description: Hard disk drive problem The hard disk cannot be accessed.
• Causes: Poor contact in the connector terminals. Defective hard disk. Defective main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC11 on the main PWB and the connector on the hard disk, and the continuity across the connector terminals. Repair or replace if necessary. Defective hard disk. 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.

• Code: C0820
• Description: Fax control PWB CG ROM checksum error (optional fax) A checksum error occurred with the CG ROM data of the fax control PWB.
• Causes: Defective fax software. Defective fax control PWB.
• Remedy: Defective fax software. Install the fax software. Defective fax control PWB. Replace the fax control PWB and verify the operation.

• Code: C0830
• Description: Fax control PWB flash program area checksum error (optional fax) A checksum error occurred with the program of the fax control PWB.
• Causes: Defective fax software. Defective fax control PWB.
• Remedy: Defective fax software. Install the fax software. Defective fax control PWB. Replace the fax control PWB and verify the operation.

• Code: C0840
• Description: Faults of RTC The time is judged to go back based on the comparison of the RTC time and the current time or five years or more have passed.
• Causes: Defective main PWB. The battery is disconnected from the main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation. The battery is disconnected from the main PWB. Check visually and remedy if necessary.

• Code: C0860
• Description: Fax control PWB software switch checksum error (optional fax) A checksum error occurred with the software switch value of the fax control PWB.
• Causes: Defective fax software. Defective fax control PWB.
• Remedy: Defective fax software. Install the fax software. Defective fax control PWB. Replace the fax control PWB and verify the operation.

• Code: C0870
• Description: Fax control PWB to main PWB high capacity data transfer problem High-capacity data transfer between the fax control PWB and the scanner MIP PWB was not normally performed even if the data transfer was retried 10 times.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the main PWB and the connector on the fax control PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the fax control PWB or main PWB and check for correct operation.