Sharp AR-651 Service Handbook page 248

[CC5] Abnormal horizontal registration motor (with AR-PN3 connected)
Is the horizontal registration home position sensor (PI1P) working normally?
NO
YES
Is the wiring between the horizontal registration home position sensor (PI1P) and finisher controller
PC board correct?
YES
NO
Is the horizontal registration mechanism normal?
NO
YES
Is the problem solved by replacing the horizontal registration motor (M2P)?
YES
NO
Is the problem solved by replacing the punch motor?
YES
NO
Is the problem solved by replacing the punch driver board?
YES
NO
Replace the finisher controller PC board.
AR-651/810 TROUBLE SHOOTING
Replace the sensor.
Correct the wiring.
Fix the mechanism.
END
END
END
5 - 98