- Paper feed assist fan /Fr3 (FM9: PF-703)
- PF drive board (PFUDB)
- Check the connector connection and the wiring between PFUDB and the fan, and repair it if any abnormality.
- Rotate the fan with I/O or by hand, and repair or replaced it if there is any abnormality. (Wiring diagram: PF-703: 18-F).
- Replace FM9.
- Replace PFUDB.
