- FNS control board (FNSCB)
- Paper exit alignment plate up down motor (M13)
- Paper exit alignment plate up down home sensor (PS21)
- Check the connector connection and the wiring between FNSCB and motor/sensor, and repair it if any abnormality.
- Check the I/O drive of the motor and the coupling of the gear, and repair/replace it if any abnormality. (Wiring diagram: FS-532: 4-F)
- Check I/O and the operation of the sensor, and repair/replace it if any abnormality. (Wiring diagram: FS-532: 5-B)
- Replace PS21.
- Replace M13.
- Replace FNSCB.
