Ricoh G188 Service Manual page 301

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Defective or disconnected harness to polygon motor driver board
Defective polygon motor driver board
Defective polygon motor.
1. Replace the polygon motor.
2. Replace the laser optics housing unit.
3. Replace the harness.
4. Replace the BCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Polygon motor error 2: OFF timeout
The polygon mirror motor does leave the READY status within 3
seconds after the polygon motor switches off.
203 D
Disconnected or defective harness to polygon motor driver board
Defective polygon motor driver board
Defective polygon motor
See SC 202 for troubleshooting details.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Polygon motor error 3: XSCRDY signal error
The SCRDY_N signal goes HIGH (inactive) while the laser diode is
firing.
204 D
Disconnected or defective harness to polygon motor driver board
Defective polygon motor
Defective polygon motor driver board
See SC 202 for troubleshooting details.
SM Appendix
Service Call Conditions
3-5 G188/G189