44205401TH Rev.1
169 /
Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
Check item Check work
Action to be taken
at NG
(7-1-4) Check the system connection
Signal cable for rela
y
board, EXIT sensor
cable
Check that FFC is normally inserted at the
RELAY connector
of the CU/PU board and at
the PU IF connector .
Check that the relay board and the EXIT sensor
are normally connected.
Normalize the
connection
condition.
Signal cable for relay
board, EXIT sensor
cable
Confirm that the cables are not pinched, sheathes
are not peeled off, and they are assembled
normally.
Replace the
connecting cable
and normalize
the assembled
condition.
(7-2) Paper unloading jam occurs after a paper is taken into printer.
Check item Check work
Action to be taken
at NG
(7-2-1) Check condition of the paper running path
Face Up Stacker
Cover
Confirm that it is either fully opened or fully
closed
Eliminate an
y
in-between
condition of the
cover between
the fully open
position and fully
closed position.
Duplex pull-in gate Confirm that the Duplex pull-in gate works
normally by using the Motor & Clutch Test of the
self-diagnostic mode.
Is it set to the paper unloading side normally?
Replace the
Duplex pull-
in gate or the
Duplex solenoid
Rear panel Chec
k that the installation condition of the rear
panel hampers smooth mov
ement of a paper in
the paper running path, or not.
Remove the rear
panel and re-
install it.
Paper running path
of unloading unit
Check that any mechanical load does not exist
that hampers the smooth movement of paper in
the paper running path of the paper unloading
unit, by the visual inspection.
Check if the paper unloading motor becomes
difficult to rotate or not.
Correct the
portion that
becomes
mechanical load.
Check item Check work
Action to be taken
at NG
(7-2-2) Check condition of the mechanical parts
Sensor lever of the
paper e
xit sensor
Check if shape and mov
ement of the sensor
levers have any abnormality or not.
Replace the
sensor lever with
the good sensor
lever.
(7-2-3) Motor operation check
Fuser motor Confirm that the fuser motor w
orks normally
by using the Motor & Clutch Test of the self-
diagnostic mode.
Check if any load exists or not.
Replace the
CU/PU board or
fuser motor or
fuser unit.
If any attempt of
using new fuser
unit as a trial
is going to be
made, be sure to
use the System
Maintenance
Menu FUSE
KEEP MODE.
(7-2-4) Check the system connection
Fuser motor drive
cable
Check the connection condition of the cables.
CU/PU board DCHEAT connector
, Check if
the connector is connected in the half-way only
or not, and check if the connector is inserted in a
slanted angle or not. Check also that cables are
assembled without any abnormality.
Replace the
cable with the
good cable
that normalizes
the connection
condition.
Fuser motor Replace the
fuser motor.
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