Utax PF-3100, Service Manual

Page: 42 / 58

3S3
1-3-11
(8) The tray is still
kept on descending
beyond the bottom
position. Defective PF main PWB. Follow the flow chart below.
Defective tray elevation
motor.
Defective wire.
Defective tray bottom posi-
tion sensor.
Problem Causes/check procedures Corrective measures
No
No
Yes
Replace PF main PWB.
Replace tray elevation motor.
Replace wire between PF main
PWB and tray elevation motor.
Replace PF main PWB.
Replace tray elevation motor.
Replace wire between PF main PWB
and tray elevation motor.
Replace tray bottom position
sensor, or repair/replace actuator.
Replace wire between tray bottom
position sensor and PF main PWB.
After replacing items described
above, check whether the operation
status is in good status or not.
Yes
OK?
End
Start
Pin 3 of YC7 = 3.3 V
with tray be reached to
the bottom position.