Ricoh D104 Field Service Manual page 606

6. Troubleshooting
No. Type
669 D
No. Type
CTL
670
D
6
No. Type
CTL
671
D
604
Details (Symptom, Possible Cause, Troubleshooting Procedures)
NVRAM error
Retry of NVRAM communication fails three times after the machine has detected the
NVRAM error.
• Caused by noise
Turn the main power switch off and on.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Engine start up error
The ready signal from the engine board is not detected.
• Defective engine board.
Replace the engine board.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Engine board mismatch error
Engine board and controller mismatch detected.
• Wrong engine board installed.
• Wrong controller board installed.
• Check the type of engine board and controller board.
1. Replace the BCU.
2. Replace the controller board.