Ricoh D037 Service Manual page 445

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
4. Replace the BCU.
No. Type
530 D
531 D
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Laser unit fan error
The motor lock signal error is detected for 10 seconds after the motor
lock signal was first detected.
Defective laser unit fan
Disconnected or defective harness
532 D
Defective drive board
Defective BCU
1. Check or replace the harness.
2. Replace the laser unit fan.
3. Replace the DRB.
4. Replace the BCU.
SM Appendix
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Ventilation fan: front error
Ventilation fan: rear error
The motor lock signal error is detected for 10 seconds after the
motor lock signal was first detected.
Defective ventilation fan: front or rear
Disconnected or defective harness
Defective DRB
Defective BCU
1. Check or replace the harness.
2. Replace the ventilation fan: front (SC530) or rear (SC531).
3. Replace the DRB.
4. Replace the BCU.
4-23
SC Tables
D037/D038/D040/D041