Ricoh D104 Field Service Manual page 576

6. Troubleshooting
No. Type
- -
6
No. Type
230 D
No. Type
231 D
574
Details (Symptom, Possible Cause, Troubleshooting Procedures)
The laser synchronizing detection signal for the start position of the LDB [K], [Y], 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 unit.
3. Replace the IPU board.
4. Replace the BCU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
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
• Poor connection between IPU and BCU.
• Defective BCU
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)
FGATE OFF error: K
• The PFGATE ON signal still asserts within 5 seconds after processing the image
in normal job or MUSIC (line position adjustment) for end position [K].
• The PFGATE ON signal still asserts when the next job starts.
See SC 230 for troubleshooting details.