Ricoh D027 Service Manual page 44

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.
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.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
RFID: Communication error
Communication error occurs when the RFID starts to communicate
with the RFID receptor.
Retry of RFID communication fails three times after the machine
has detected the RFID communication error.
681 D
Defective RFID reader and writer
Disconnected ASAP I/F
No memory chip on the toner cartridge
Noise
1. Replace the RFID controller board.
2. Replace the toner cartridge.
SM 3-47
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SC Tables
D027/D029 APPENDICES