No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
682 D
Memory chip at TD sensor: Communication error
Retry of memory chip communication fails three times after the machine has detected
the memory chip communication error.
• Damaged memory chip data
• Disconnected inter face
• No memory chip on the development unit
• Noise
Replace the PCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
683 B
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 BICU 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 BICU
1. Check if the controller is firmly connected to the BICU.
2. Replace the controller.
3. Replace the BICU.
3. Appendix: Service Call Conditions
84
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