No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
683 C RFID: Unit check error
The machine gets RFID communication error even the toner cartridges have not
been installed in the machine.
• Caused by noise
Turn the main power switch off and on.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
687 D Memory address command error
The BCU does not receive a memory address command from the controller for the
prescribed time after the paper has reached the registration sensor.
• Harness disconnection at BCU
• Controller board loose or broken
• Defective HDD
• Defective BCU
• Defective controller
1. Check if the controller is firmly connected to the BCU.
2. Update the firmware of the controller.
3. Replace the HDD.
4. Update the firmware of the BCU.
5. Replace the BCU.
6. Replace the controller.
6. Troubleshooting
598
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