Defective PF main PWB. Follow the flow chart below.
No
Yes
Replace PF main PWB.
Replace tray elevation motor.
Replace wire between PF main
PWB and tray elevation motor.
Replace wire between top position
detecting tray top position sensor
and PF main PWB.
Replace tray top position sensor, or
repair/replace actuator.
After replacing items described
above, check whether the operation
status is in good status or not.
OK?
End
Start
Pin 3 of YC5 = 0 V
with tray be reached to
the top position?
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