Sharp AR-650 Service Handbook page 161

[CC6]Punch motor is abnormal
Is the punch home position sensor (PI3P) working normally?
No
Yes
Is the harness connecting the punch home position sensor (PI3P) and finisher controller PC
board open-or short-circuited?
Yes
No
Is the punching mechanism normal?
No
Yes
Is the problem solved by replacing the punch motor (M1P) ?
Yes
No
Is the problem solved by replacing the punch driver board?
Yes
No
Replace the finisher controller PC board.
Replace the sensor.
Replace the harness.
Correct the mechanism.
END
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