44205301TH Rev.1
164 /
Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
(5-2) Jam occurs immediately after paper feed is started. (Multipurpose tray)
Check item Check work
Action to be taken
at NG
(5-2-1) Check condition of the paper running path
Paper running path
of the m
ultipurpose
tray
Check if paper is jammed or not in the paper
r
unning path.
Remove the
jammed paper.
Sheet Receive of the
multipurpose tray
Confirm that the Sheet Receive has mo
ved up
normally.
Confirm that the support spindle and spring of
the Sheet Receive have been installed in the
specified positions normally.
Correct
installation of
the above parts
so that the
Sheet Receive
moves up to
the specified
position
normally.
(5-2-2) Check condition of the mechanical parts
Check the sensor
levers of the paper
entrance sensor 2
and the WR sensor.
Check if shape and movement of the sensor
levers have any abnormality or not.
Replace the
sensor with the
good sensor
lever.
Planetary gear for
paper feed control
Rotate the paper feed motor (FRONT MOTOR)
using the Motor & Clutch Test of the self-
diagnostic mode, and confirm that both of the
two planetary gears rotate at the bottom position.
(The planetary gear box can be located because
it is the white molded block that is located on the
right side when the front cover is opened.)
Replace the
planetary gear
box
F
ront cov
er Confirm that the locks in the right and left of the
front cover are locked normally.
Replace the font
cov
er assembly
Check the feed roller
and the pickup roller.
Check if any foreign materials such as paper
dust on the surface of the feed roller or of the
pickup roller or not.
Remove the
foreign material.
Check if the feed roller has worn out or not. Replace the feed
roller.
Check item Check work
Action to be taken
at NG
(5-2-3) Motor operation check
Paper feed motor
Confirm that the paper feed motor works
normally by using the Motor & Clutch Test of the
self-diagnostic mode.
Replace the
CU/PU board,
or replace the
paper feed
motor.
Paper feed motor
driver
Remove the HP_PSZCL connector
of the
CU/PU board and check the followings at the
connector side.
Several M
Ω
between pin-1 – FG
Several M
Ω
between pin-2 – FG
Several M
Ω
between pin-3 – FG
Several M
Ω
between pin-4 – FG
Replace the
CU/PU board.
(5-2-4) Check the system connection
Paper feed motor
drive cable
Check the connection condition of the cable
.
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.
Paper feed motor
drive cable
Check that any cable is not pinched during
assembling of the printer.
Remove the HP_PSZCL connector
of the CU/
PU board and check the followings at the cable
side.
Short circuit between pin-1 – FG
Short circuit between pin-2 – FG
Short circuit between pin-3 – FG
Short circuit between pin-4 – FG
Replace the
cable with the
good cable
that normalizes
the connection
condition.
Paper feed motor Remove the HP_PSZCL connector
of the
CU/PU board and check that approx. 3.4
Ω
can
be measured between pin-1 -pin-2, and that
approx. 5
Ω
can be measured between pin-3
-pin-4 respectively.
Replace the
paper feed
motor.
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