Sharp AR-651 Service Handbook page 176

[E52] Leading edge of paper not reaching the transport sensor 2
Is there any paper at the reverse section when the exit cover is opened?
YES
NO
Is the transport sensor 2 working? (Perform the input check in the test mode: 03-[ENERGY
SAVER]OFF/[9]/[B])
NO
YES
Is the transport roller at the horizontal transport section rotating? (Perform the output check in
the test mode: 03-113/110/220)
NO
YES
Check the condition of the roller at the horizontal transport section and clean it, or if it is
deteriorated, replace it.
AR-651/810 TROUBLE SHOOTING
Remove the paper.
1. Check if the connector of the transport sensor 2 is not disconnected.
2. Check if the connector J334 on the LGC board is not disconnected.
3. Check if the connector pins are not disconnected and the harness is not
open-circuited.
4. Check if the conductor pattern on the LGC board is not short- or open-
circuited.
5. Replace the transport sensor 2.
6. Replace the LGC board.
1. Check if the drawer connector is not disconnected.
2. Check if the connectors of the transport drive clutch and transport clutch 2
are not disconnected.
3. Check if the connectors of the transport drive clutch and transport clutch 2
are not misconnected (drive clutch: black-black, transport clutch 2: black-blue).
4. Check if the connector J334 on the LGC board is not disconnected.
5. Check if the connector pins are not disconnected and the harness is not
open-circuited.
6. Check if the conductor pattern on the LGC board is not short- or open-
circuited.
7. Replace the transport drive clutch and transport clutch 2.
8. Replace the LGC board.
9. Check if the front side timing belt is put on properly.
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