Ricoh MPC 2800 AT-C2, Field Service Manual, Page: 406 / 856

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
- -
The laser synchronizing detection signal for the start position of the LDB [K], [Y], [C]
is not output for two seconds after LDB unit turns on while the polygon motor is
rotating normally.
• Disconnected cable from the laser synchronizing detection unit or defective
connection
• Defective laser synchronizing detector
• Defective LDB
• Defective BICU
1. Check the connectors.
2. Replace the laser-synchronizing detector.
3. Replace the LDB.
4. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
230 D
FGATE ON error: K
The PFGATE ON signal does not assert within 5 seconds after processing the image
in normal job or MUSIC for start position [K].
• Defective ASIC (Lupus)
• Poor connection between controller and BICU.
• Defective BICU
1. Check the connection between the controller board and the BICU.
2. Replace the BICU.
3. Replace the controller board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
231 D
FGATE OFF error: K
• The PFGATE ON signal still asserts within 5 seconds after processing the image
in normal job or MUSIC for end position [K].
• The PFGATE ON signal still asserts when the next job starts.
See SC 230 for troubleshooting details.
3. Appendix: Service Call Conditions
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