Ricoh MPC 2800 AT-C2 Field Service Manual page 438

3. Appendix: Service Call Conditions
No. Type
669 D
3
No. Type
CTL
670
D
CTL
671
D
82
Details (Symptom, Possible Cause, Troubleshooting Procedures)
EEPROM error
Retry of EEPROM communication fails three times after the machine has detected
the EEPROM 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.
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 BICU.
2. Replace the controller board.