• Code: C0210
• Description: CPU communication problem There is no reply after 3 retries at communication.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of the engine PWB and main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the engine PWB or main PWB and check for correct operation.

• Code: C0220
• Description: Communication problem between the scanner PWB and main PWB There is no reply after 6 retries at communication.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the scanner PWB and the connector on the main PWB. Repair or replace if necessary. Defective PWB. Replace the scanner PWB or main PWB and check for correct operation.

• Code: C0240
• Description: Printer PWB communication problem The printer PWB does not respond 120 s after the power is turned on.
• Causes: Poor contact in the connector terminals. DIMM or DDR installed incorrectly. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC21 on the engine PWB and the connector YC7 on the printer PWB, and the continuity across the connector terminals. Repair or replace if necessary. DIMM or DDR installed incorrectly. Check the connection of DIMM or DDR. Repair or replace if necessary. Defective PWB. Replace the printer PWB or engine PWB and check for correct operation.

• Code: C0250
• Description: Network scanner PWB communication problemThe 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. (This code indicates only scanner function display.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC4 on the main PWB and the connector YC1 on the network scanner PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the scanner network PWB or main PWB and check for correct operation.

• Code: C0280
• Description: Communication problem between the fax control PWB and main PWB After main PWB status change signal turns on 1 minute, when it does not receive key required command from the fax control PWB, one time it resets the FAX.After that, while main PWB status change signal turns on furthermore 1 minute, when it does not receive key required command from the fax control PWB. When FAX_READY signal continues fake for 6 s, one time it resets the FAX. After that, when FAX_READY fake continues fake for 6 s.
• 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, connection of connector YC1 on the fax control PWB and the connector on the fax relay 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.

• Code: C0410
• Description: DP communication problem (optional DP) There is no reply after 10 retries at communication or a communication error occurs.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC17 on the scanner PWB and the connector YC1 on the DP drive PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the DP drive PWB or scanner PWB and check for correct operation.

• Code: C0420
• Description: Paper feeder communication error (optional paper feeder) A communication error from paper feeder is detected 10 times in succession.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC33 on the engine PWB and the connector YC1 on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the paper feeder main PWB or engine PWB and check for correct operation.

• Code: C0440
• Description: Document finisher communication problem (optional document finisher) A communication error from document finisher is detected 10 times in succession.
• Causes: Poor contact in the connector terminals. Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC33 on the engine PWB and the connector on the finisher main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Defective PWB. Replace the finisher main PWB or engine PWB and check for correct operation.