Ricoh G188 Service Manual page 335

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
EEPROM error
Retry of EEPROM communication fails three times after the machine
has detected the EEPROM error.
669 D
Caused by noise
Turn the main power switch off and on.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
No response from controller at power on
When the main power is turned on or the machine starts warming up
from energy-saving mode, the controller does not receive a command
signal from the controller.
CTL
Loose connection
670
D
Defective controller
Defective controller board
1. Check the connection between the BCU and controller.
2. Replace the controller.
3. Replace the BCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Engine board mismatch error
Engine board and controller mismatch detected.
Wrong engine board installed.
CTL
671
Wrong controller board installed.
D
Check the type of engine board and controller board.
1. Replace the BCU.
2. Replace the controller board.
SM Appendix
Service Call Conditions
3-39 G188/G189