Symptom Step Check Item Result Action
•
Paper is
stationary near
the Vertical
Transport Section.
5
Is Vertical Transport Drive
Motor M21 turning when a
copy is taken up and fed
into the copier from the
Duplex Unit?
YES Check for possible overload.
NO
Check the Duplex Unit drive
coupling, or replace PWB-A
(PF-201) (PF-1D), PWB-G,
and/or M21.
6
Are the Vertical Transport
Rollers and Guide Plate
deformed, worn, or dirty
with paper dust?
YES
Clean or replace the
Vertical Transport Rollers
and Guide Plate.
7
Slide out the Duplex Unit
and remove the PWB
Cover. Then, slide the
Duplex Unit back into the
copier. Does the voltage
across PJ2G-9 on PWB-G
and GND change from
DC5V to DC0V when
Duplex Unit Paper Take-Up
Sensor PC16 is blocked by
a sheet of paper in the
above condition?
NO
Check the Actuator for
operation.
Check PC16.
8
Does the voltage across
PJ9AA-9 on PWB-A
(PF-201) and GND change
from DC5V to DC0V when
Vertical Transport Detection
Sensor 3 PC17 is blocked
by a sheet of paper?
(For PF-1D, check the
voltage across PJ6A-6 and
GND.)
YES
Replace PWB-G or PWB-A
(PF-201) (PF-1D).
NO
Check the Actuator for
operation.
Check PC17.
T-31