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

• Code: C0600
• Description: DIMM installed incorrectly DIMM is not installed correctly.
• Causes: DIMM installed incorrectly.
• Remedy: DIMM installed incorrectly. Check if the DIMM is inserted into the socket on the main PWB correctly.

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

• 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 YC49 on the main PWB and the connector on the hard disk. 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: C0700
• Description: CF error for backup Optional fax backup kit (CF) is not suitable as backup.
• Causes: CF installed incorrectly. Defective CF.
• Remedy: CF installed incorrectly. Install CF correctly. Defective CF. Run the maintenance item U933 to initialize the CF.

• Code: C0800
• Description: Image processing problem JAM05 is detected twice.
• Causes: Defective main PWB.
• Remedy: Defective main PWB. Replace the main PWB and check for correct operation.

• Code: C0830
• Description: Flash ROM program area checksum error (optional fax) A checksum error occurred with the program in the Flash ROM on the fax control PWB.
• Causes: Defective fax control PWB.
• Remedy: Defective fax control PWB. Upgrade the fax control PWB software. If the problem still remains, replace the fax control PWB and check for correct operation.