played.
Defective main PWB. Follow the flow chart below.
Replace paper feed sensor, or
replace wire between PF main
PWB and paper feed sensor.
Replace PF main PWB.
Repair actuator or replace the
wire material.
Replace or repair wire.
Replace PF main PWB.
Replace PF main PWB or paper
feed motor.
No
No
No
No
Yes
Yes
Yes
Yes
Start
Paper is fed to
the paper feed
sensor?
Pin 2 of YC3
on the PF main
PWB with the
paper detected by
the paper feed
sensor is
5 V?
The actuator
of the paper feed sensor
activates properly?
Wire between PF main PWB
and paper feed sensor is in
good status? (no damage
coating, or no connector
loosen, etc.?)
Wire between
PF main PWB and
paper feed motor is in
good status? (no
damage coating, or no
connector loosen,
etc.?)