Sharp AR-650 Service Handbook page 147

[Procedure 2]
Is the tray arriving at the tray upper limit switch (MS5) position?
Yes
No
Is the tray upper limit switch (MS5) normal?
No
Yes
Is the wiring from the finisher controller board up to the tray upper limit detection switch nor-
mal?
No
Yes
Replace the finisher controller board.
[Procedure 3]
Is the tray elevated?
No
Yes
Are tray lift motor clock sensors 1/2 (PI19/PI9) normal?
No
Yes
Replace the finisher controller.
Lower the tray position.
Replace the switch.
Correct the wiring.
Is power being supplied to the motor from the finisher controller board
during tray elevation?
No Replace the finisher controller board.
Yes
Is there a trouble on the tray elevation mechanism?
No Replace the tray lift motor (M5).
Yes
Correct the tray elevation mechanism.
Replace the sensor board.
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