Ricoh G188 Service Manual page 303

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
The laser synchronizing detection signal for the start position of the
LDB [K], [Y], [M], [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 BCU
1. Check the connectors.
2. Replace the laser-synchronizing detector.
3. Replace the LDB.
4. Replace the BCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
FGATE ON error: Bk
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)
230 D
Poor connection between controller and BCU.
Defective BCU
1. Check the connection between the controller board and the BCU.
2. Replace the BCU.
3. Replace the controller board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
231 D FGATE OFF error: Bk
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.
SM Appendix
Service Call Conditions
3-7 G188/G189