Ricoh D027 Service Manual page 8

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
The SCRDY_N signal goes HIGH (inactive) while the laser diode is
firing.
Disconnected or defective harness to polygon motor driver board
Defective polygon motor
Defective polygon motor driver board
1. Check or replace the harness.
2. Replace the polygon motor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
210 C Laser synchronizing detection error: end position [K]
211 C Laser synchronizing detection error: end position [Y]
212 C Laser synchronizing detection error: end position [M]
213 C Laser synchronizing detection error: end position [C]
The laser synchronizing detection signal for the end position of LDB [K],
[Y], [M], [C] is not detected for one second after the LDB unit turned on
when detecting the main scan magnification.
Disconnected or defective harness to synchronizing detector for
end position
- -
Defective synchronizing detector board
Defective LD board or driver
Defective BICU
1. Replace the harness of the LD board.
2. Replace the laser optics housing unit.
3. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
220 D Laser synchronizing detection error: start position [K]: LD0
SM 3-11
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SC Tables
D027/D029 APPENDICES