SC6xx: Communication
D0CA/D0C9/D0C8/D0CB 6-52 SM
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC623-00 D Optional Paper Feed Unit 2 (Paper Tray 3) Communication Error
An error signal is detected during communication between the optional paper
feed unit and the main machine.
• Optional Paper Feed Unit 2 Main Board (PCB1) is defective.
• Optional Paper Feed Unit 1 Main Board (PCB1) is defective.
• Connection error between Paper Feed Unit 1 and Paper Feed Unit 2.
Check if the SC occurs by turning the main power OFF then ON. If the SC
occurs again, do the following steps. Check if the SC reoccurs by cycling the
power after each step.
1. Replace the Paper Feed Unit 2 Main Board (PCB1).
2. Replace the Paper Feed Unit 1 Main Board (PCB1).
3. Reattach the Paper Feed Unit 2 to the Paper Feed Unit 1.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC624-00 D Optional Paper Feed Unit 3 (Paper Tray 4) Communication Error
An error signal is detected during communication between the optional paper
feed unit and the main machine.
• Optional Paper Feed Unit 3 Main Board (PCB1) is defective.
• Optional Paper Feed Unit 2 Main Board (PCB1) is defective.
• Connection error between Paper Feed Unit 2 and Paper Feed Unit 3.
Check if the SC occurs by turning the main power OFF then ON. If the SC
occurs again, do the following steps. Check if the SC reoccurs by cycling the
power after each step.
1. Replace the Paper Feed Unit 3 Main Board (PCB1).
2. Replace the Paper Feed Unit 2 Main Board (PCB1).
3. Reattach the Paper Feed Unit 3 to the Paper Feed Unit 2.
SC No. Type Error Name/Error Condition/Major Cause/Solution
SC632-00 D Counter Device Error 1
After 3 attempts to send a data frame to the optional counter device via the
serial communication line, no ACK signal was received within 100 ms.
Serial line between the optional counter device, the relay board and copier
control board is disconnected or damaged.
1. Turn the main switch OFF and ON.
2. Check the serial communication line.
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