Utax PF-3100, Service Manual

Page: 40 / 58

3S3
1-3-9
(6)The tray is not
ascended even
though the tray cover
is closed (and
rebooted). Defective wire. Follow the flow chart below.
Defective tray bottom posi-
tion sensor.
Defective PF main PWB.
Defective cover interlock
switch.
Defective tray elevation
motor.
Problem Causes/check procedures Corrective measures
Replace or repair wire.
Replace/repair belt or gear.
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Replace tray elevation motor.
Replace wire between main PWB
and tray elevation motor.
Replace main PWB.
Replace tray bottom position sensor,
or repair/replace actuator.
Replace or repair wire between main
PWB and tray bottom position
sensor.
Replace main PWB.
Replace cover interlock switch or
replace actuator.
Replace or repair wire between
main PWB and cover interlock
Yes
Yes
Yes
Replace engine PWB of printer.
Replace wire between printer
engine PWB and printer base.
Replace wire between printer base
Start
Pin 1 of
YC6= 0 V
and pin 2 = 0 V
with the cover
closed?
Pin 3 of
YC5 = 0 V?
Pin 1 of
YC4 = 0 V and pin 2 = 24
V with the cover closed?
(with the tray still enables
to be ascended)
Pin 1 of
YC1 = 5 V?
Pin 1 of
YC6 = 3.3 V?
Is belt and
driving part of the
elevation motor
in good status?
Wire between
main PWB and tray
elevation motor is in good
status? (no damage
coating, or no connector
loosen, etc?)