Ricoh M022 Service Manual page 684

6. Troubleshooting
No. Type
687 D
No. Type
6
690 D
682
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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
• Defective controller
• Defective BCU
1. Check if the controller is firmly connected to the BCU.
2. Replace the controller.
3. Replace the BCU.
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
• 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 board.
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