Ricoh G188 Service Manual page 306

Service Call Conditions
No. Type
2.
3.
No. Type
Line position adjustment (MUSIC) error
Line position adjustment fails four consecutive times.
285 D
1.
2.
3.
4.
5.
6.
G188/G189
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Replace the laser optics housing unit.
Replace the BCU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pattern sampling error (insufficient image density )
Defective ID sensors for the line position adjustment
Defective image transfer belt unit
Defective PCU(s)
Defective laser optics housing unit
Check and reinstall the image transfer belt unit and PCUs.
Check if each toner bottle has enough toner.
Replace the ID sensor.
Replace the image transfer belt unit.
Replace the PCU(s).
Replace the laser optics housing unit.
3-10 SM Appendix