Ricoh G188 Service Manual page 309

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
373 D TD sensor adjustment error: M
374 D TD sensor adjustment error: C
375 D TD sensor adjustment error: Y
During TD sensor initialization, the output value of the black, magenta,
cyan, or yellow TD sensor is not within the range of the specified value
with SP3238-001 to -004 (default: 2.7V) ± 0.2V
Heat seal not removed from a new developer pack
- -
TD harness sensor disconnected, loose or defective
TD sensor defective
Harness between TD sensor and drawer disconnected, defective
1. Remove the heat seal from each PCU.
2. Replace the defective PCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
380 C Drum gear position sensor error: K
381 C Drum gear position sensor error: M
382 C Drum gear position sensor error: C
383 C Drum gear position sensor error: Y
The machine does not detect the drum position signal for 3 seconds at
the drum phase adjustment.
Dirty or defective drum gear position sensor
1. Clean the drum gear position sensor.
2. Check the harness connection.
3. Replace the drum gear position sensor.
4. Replace the PCU.
SM Appendix
Service Call Conditions
3-13 G188/G189