Sharp AR-650 Service Handbook page 156

[Procedure 2]
Check the switch actuator of the front door. Are the switch and the sensor being working properly?
No
Yes
Check the front door switch. Is the switch normal?
No
Yes
Measure J11-12 voltage of the saddle switcher controller with the front door open. Is 5V being
supplied?
Yes
No
Replace the saddle stitcher controller board.
[Procedure 3]
Check the switch actuator of the exit door. Are the switch and the sensor being working properly?
No
Yes
Check the exit door switch. Is the switch normal?
No
Yes
Measure J11-9 voltage access of the saddle stitcher with the exit door is open. Is it 5V ?
Yes
No
Replace the saddle stitcher controller board.
TROUBLE SHOOTING
Connect the connector.
Replace the switch.
The sensor is broken, so replace it.
Correct the mechanism.
Replace the switch.
the sensor is broken, so replace it.
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