Toshiba DP4500 Service Handbook page 109

[E15] PFP upper cassette misfeeding (paper not reaching the PFP upper feed sensor)
Open the PFP side cover. Is there any paper in front of the PFP upper feed sensor?
YES
NO
Is the PFP upper feed sensor working?
(Perform the input check in the test mode: 03-[FAX]OFF/[2]/[D])
NO
YES
Is the PFP upper cassette feed clutch working? (Perform the output check in the test mode: 03-226)
NO
YES
Check the PFP upper cassette feed roller and separation roller. Replace them if they are worn out.
DP4500/3500 TROUBLESHOOTING
Remove the paper.
1. Check if the connector of the PFP upper feed sensor is disconnected.
2. Check if either of the connectors CN241 or CN243 on the PFP board is disconnected.
3. Check if the connector J312 on the LGC board is disconnected.
4. Check if the connector pins are disconnected and the harnesses are open-circuited.
5. Check if the conductor patterns on the PFP board and LGC board are short- or open-circuited.
6. Replace the PFP upper feed sensor.
7. Replace the PFP board.
8. Replace the LGC board.
1. Check if the connector of the PFP upper cassette feed clutch is disconnected.
2. Check if any of the connectors CN241, CN242 and CN244 on the PFP board is
disconnected.
3. Check if the connector J312 on the LGC board is disconnected.
4. Check if the connector pins are disconnected and the harnesses are open-circuited.
5. Check if the conductor patterns on the PFP board and LGC board are short- or
open-circuited.
6. Replace the PFP upper cassette feed clutch.
7. Replace the PFP board.
8. Replace the LGC board.
5 - 14 December 2000 © TOSHIBA TEC