Ricoh Pro C7200S Troubleshooting Manual page 146

1.SC Codes
SC No. Level
SC No. Level
SC687-00 D
SC No. Level
SC688- D
01
SC688- D
02
SC688- D
03
142
Error Name/Error Condition/Major Cause/Solution
2. PSU4 defective
3. PFB defective
4. Connecter disconnected
5. IOB malfunction
6. Harness broken
1. Replace the part where grounding fault occurred.
2. Replace the PSU4
3. Set the connector again.
4. Replace the PFB.
5. Replace the IOB.
6. Replace the harness.
Error Name/Error Condition/Major Cause/Solution
PER Not Received Error
Unable to receive the PER command from the controller.
Communication error
Cycle the machine off/on.
Error Name/Error Condition/Major Cause/Solution
Communication error during TSB power activation
Communication error during TSB normal status
Break detection during TSB normal status
At the time of an ASAP communication protocol error,

When a break signal is detected during power activation.

When a non-response (100ms) is detected 3 times consecutively during
normal operation.

When NAK is detected 3 times before ACK response during normal
operation.

When a break signal is detected during normal operation.

TSB error

IOB error

Harness disconnected between TSB and IOB

Connector disconnected between TSB and IOB

Unintended noise