Ricoh OR-C1 Field Service Manual page 410

3. Appendix: Service Call Conditions
No. Type
231 D
3
No. Type
240 C
52
Details (Symptom, Possible Cause, Troubleshooting Procedures)
FGATE OFF error
The FGATE signal did not go off within the prescribed time. (The BCU generates
the FGATE signal and sends it to the LD unit when the registration sensor switches
on.)
• BCU, Controller board harness loose or broken
• BCU defective
• Controller board defective
1. Check the connection between the controller board and the BCU.
2. Replace the BCU.
3. Replace the controller board.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
LD error
The IPU detected a problem at the LD unit.
• LD unit harness broken, defective
• BCU harness broken defective
• LD unit defective
• BCU defective
1. Replace the harness of the LD.
2. Replace the laser optics housing unit.
3. Replace the harness of the BCU.
4. Replace the BCU.