Sharp AR-651 Service Handbook page 179

[E57] Leading edge of paper not reaching the reverse sensor 1
Is there any paper before the registration sensor when the exit cover is opened?
YES
Remove the paper.
NO
Is the reverse sensor 1 working? (Perform the input check in the test mode: 03-[ENERGY
SAVER]OFF/[2]/[B])
NO
1. Check if the connector of the reverse sensor 1 is not disconnected.
2. Check if the connector J335 on the LGC board is not disconnected.
3. Check if the connector pins are not disconnected and the harness is not
4. Check if the conductor pattern on the LGC board is not short- or open-
5. Replace the reverse sensor 1.
6. Replace the LGC board.
YES
Is the reverse motor driving? (Perform the output check in the test mode: 03-126)
NO
1. Check if the connector of the reverse transport unit is not disconnected.
2. Check if the connector J335 on the LGC board is not disconnected.
3. Check if the connector pins are not disconnected and the harness is not
4. Check if the conductor pattern on the LGC board is not short- or open-
5. Replace the LGC board
YES
Is the gate solenoid working? (Perform the output check in the test mode: 03-274)
NO
1. Check if the connector of the gate solenoid is not disconnected.
2. Check if the connector J335 on the LGC board is not disconnected.
3. Check if the connector pins are not disconnected and the harness is not
4. Check if the conductor pattern on the LGC board is not short- or open-
5. Replace the LGC board
YES
1. Check if there is no mechanical loading at the exit/reversal gate.
2. Check the myler at the reverse section and clean it, or if it is deteriorated, replace it.
open-circuited.
circuited.
open-circuited.
circuited.
open-circuited.
circuited.
5 - 29 AR-651/810 TROUBLE SHOOTING