Ricoh G188 Service Manual page 337

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Turn the main power switch off and on.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Memory address command error
The BCU does not receive a memory address command from the
controller 120 seconds after paper is in the position for registration.
Loose connection
687 D
Defective controller
Defective BCU
1. Check if the controller is firmly connected to the BCU.
2. Replace the controller.
3. Replace the BCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
GAVD communication error
The I2C bus device ID is not identified during initialization.
A device-status error occurs during I2C bus communication.
The I2C bus communication is not established due to an error other
than a buffer shortage.
Loose connection
690 D
Defective BCU
Defective LD controller board
1. Turn the main switch off and on.
2. Check the cable connection.
3. Replace the laser optics-housing unit.
4. Replace the BCU.
SM Appendix
Service Call Conditions
3-41 G188/G189