Estimated abnormal parts:
- Printer control board (PRCB)
- RU control board (RUCB)
- Turn OFF the sub power switch, and then turn OFF the main power switch. Then unplug all the power plug. Restart the main body after 10 seconds.
- Check the connector connection and the wiring between the main body and each option, and repair it when there is any abnormality.
- Check the connector connection of the control board and the drive board in each option, and repair it when there is any abnormality.
- Rewrite the firmware of the option.
- Replace the control board of the option corresponds to the malfunction code.
