Toshiba DP3500, Service Handbook

Page: 144 / 257

December 2000 © TOSHIBA TEC 5 - 49 DP4500/3500 TROUBLESHOOTING
5.1.8 Paper feeding system related service call
[C04] PFP motor is abnormal (paper can be fed from the cassettes other than PFP cassette)
Is the PFP motor working? (Perform the output check in the test mode: 03-109/159)
NO
1. Check if the signal line connector CN1 of the PFP motor is disconnected.
2. Check if the power line connector CN2 of the PFP motor is disconnected.
3. Check if the connector CN246 on the PFP board is disconnected.
4. Check if the signal line connector CN241 on the PFP board is disconnected.
5. Check if the power line connector CN242 on the PFP board is disconnected.
6. Check if the connector J312 on the LGC board is disconnected.
7. Check if the connector pins are disconnected and the harnesses are open-circuited.
8. Check if the conductor patterns on the PFP motor board, PFP board and LGC
board are short- or open circuited.
9. Replace the PFP motor.
10. Replace the PFP board.
11. Replace the LGC board.
YES
Is the LED on the PFP motor board lit without flashing?
NO
1. Check if the connector pins are disconnected and the harnesses are open-circuited.
2. Check if the conductor patterns on the PFP motor board, PFP board and LGC
board are short- or open-circuited.
3. Replace the PFP motor.
4. Replace the PFP board.
5. Replace the LGC board.
YES
1. Check if the PLL lock signal CN246-8 output from the PFP board is always “L” level.
2. Check if the voltage supplied to the microcomputer input terminal IC5-17 is always “L” level.
3. Replace the PFP board.
4. Replace the LGC board.
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