Ricoh D025 Service Manual page 503

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Engine start up error
The ready signal from the engine board is not detected.
CTL
670
D
Defective engine board.
Replace the engine board.
Engine board mismatch error
Engine board and controller mismatch detected.
Wrong engine board installed.
CTL
671
Wrong controller board installed.
D
Check the type of engine board and controller board.
1. Replace the BICU.
2. Replace the controller board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Controller-to-operation panel communication error at startup
After powering on the machine, the communication circuit between the
controller and the operation panel is not opened, or communication with
controller is interrupted after a normal startup.
CTL
Controller stall
672
D
Controller board installed incorrectly
Controller board defective
Operation panel connector loose or defective
1. Check the harness connection.
2. Replace the controller board.
SM Appendix 3-51
SC Tables
D023/D025