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e-STUDIO350/352/353/450/452/453
TROUBLESHOOTING
5 - 57
5
5.1.7
Paper feeding system related service call
[C040] PFP motor is abnormal (paper can be fed from the drawers other than PFP drawers)
Is the PFP motor working? (Perform the output check: 03-109/159)
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È
NO
Æ
1) Check if the signal line connector CN503 of the PFP motor is disconnected.
2) Check if the power line connector CN502 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 discon-
nected.
5) Check if the power line connector CN242 on the PFP board is discon-
nected.
6) Check if the connector CN303 on the LGC board is disconnected.
7) Check if the connector pins are disconnected or the harnesses are open
circuited.
8) Check if the conductor patterns on the PFP motor board, PFP board and
LGC board are short circuited 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 flickering?
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È
NO
Æ
1) Check if the connector pins are disconnected or the harnesses are open
circuited.
2) Check if the conductor patterns on the PFP motor board, PFP board and
LGC board are short circuited 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.
