Ricoh G188 Service Manual page 363

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
TPM system authentication error
The system firmware is not authenticated by TPM (security chip).
CTL
878
D
Incorrect updating for the system firmware
Defective flash ROM on the controller board
Replace the controller board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Electric counter error
Abnormal data in the counters.
Defective NVRAM
CTL
Defective controller
900
D
Incorrect NVRAM
1. Check the connection between the NVRAM and controller.
2. Replace the NVRAM.
3. Replace the controller board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Printer application error
An error is detected in the printer application program.
Defective software
CTL
920
Unexpected hardware resource (e.g., memory shortage)
D
1. Software defective; switch off/on, or change the controller firmware
if the problem is not solved
2. Install an optional memory.
SM Appendix
Service Call Conditions
3-67 G188/G189