Ricoh D037 Service Manual page 447

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
The motor lock signal error is detected for 10 seconds after the motor
lock signal was first detected.
Defective controller box fan
Disconnected or defective harness
Defective DRB
Defective BCU
1. Check or replace the harness.
2. Replace the controller box fan.
3. Replace the DRB.
4. Replace the BCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Junction gate solenoid fan error
The motor lock signal error is detected for 10 seconds after the motor
lock signal was first detected.
Defective junction gate solenoid fan
Disconnected or defective harness
536 D
Defective DRB
Defective BCU
1. Check or replace the harness.
2. Replace the Junction gate solenoid fan.
3. Replace the DRB.
4. Replace the BCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
540 D Fusing/Paper exit motor error
The BCU receives the lock signal 2.0 seconds after turning on the
fusing/paper exit motor.
SM Appendix 4-25
SC Tables
D037/D038/D040/D041