Description: Large paper deck /paper feed desk communication problem • Communication errors from the communication microcomputer on the main PCB. No communication: there is no reply after 5 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
Causes: Poor contact in the connector terminals. Defective main PCB. Defective deck main PCB/desk main PCB.
Remedy: Check the connection of connectors CN3 on the main PCB and the connector on the deck main PCB/desk main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the main PCB and check for correct operation. Replace the deck main PCB/desk main PCB and check for correct operation.
Code: C0440
Description: Finisher communication problem • Communication errors from the communication microcomputer on the main PCB. No communication: there is no reply after 5 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
Causes: Poor contact in the connector terminals. Defective main PCB. Defective finisher main PCB.
Remedy: Check the connection of connectors CN4, CN5 on the main PCB and CN2 on the finisher main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the main PCB and check for correct operation. Replace the finisher main PCB and check for correct operation.
Code: C0450
Description: Mailbox communication problem • Communication errors from the communication microcomputer on the main PCB. No communication: there is no reply after 5 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
Causes: Poor contact in the connector terminals. Defective main PCB. Defective mailbox main PCB.
Remedy: Check the connection of connectors CN3 on the main PCB and CN1 on the mailbox main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the main PCB and check for correct operation. Replace the mailbox main PCB and check for correct operation.
Code: C0470
Description: Switchback unit communication problem • Communication errors from the communication microcomputer on the main PCB. No communication: there is no reply after 5 retries. Abnormal communication: a communication error (parity or checksum error) is detected five times in succession.
Causes: Poor contact in the connector terminals. Defective main PCB. Defective switchback unit main PCB.
Remedy: Check the connection of connectors CN3 on the main PCB and the continuity across the connector terminals. Repair or replace if necessary. Replace the main PCB and check for correct operation. Replace the switchback unit main PCB and check for correct operation.
Code: C0600
Description: DIMM problem The DIMM on the memory PCB does not operate correctly.