44952001TH Rev.2
7-69
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
(6-2) Jam occurs immediately after a paper is taken into printer.
Check item Checking method Action in case of NG
(6-2-1) Check condition of the paper running path
Paper running path
on the belt.
Remove the ID unit and check if paper is
jammedornotinthepaperrunningpath.
Removethejammed
paper.
(6-2-2) Check condition of the mechanical parts
Check the sensor
lever of the WR
sensor.
Check if shape and movement of the sensor
levers have any abnormality or not.
Replace the sensor
lever with the good
sensor lever.
(6-2-3) Motor operation check
Paper feed motor
driver, belt motor
driver and ID motor
Confirm that the paper feed motor, belt
motor and ID motor work normally by
using the Motor & Clutch Test of the self-
diagnostic mode.
Check if any load exists or not.
Feed motor driving
cord, image drum
motor driving cord,
belt motor, fuser
driving cord
If any attempt of using
new ID unit or new belt
unit as a trial is going
to be made, be sure
to use the System
Maintenance Menu
FUSE KEEP MODE.
Paper feed motor,
belt motor
Pull out the CU/PU board BELT connector
③
, and check the following at the side of the
connector:
Several M
between Pin 1 and frame ground
Several M between Pin 2 and frame ground
Several M between Pin 3 and frame ground
Several M between Pin 4 and frame ground
Pull out the CU/PU board HOP connector
①
, and check the following at the side of the
connector:
Several M
between pin-1 – FG
Several M between pin-2 – FG
Several M between pin-3 – FG
Several M between pin-4 – FG
Replace the CU/PU
board.
Check item Checking method Action in case of NG
(6-2-4) Check the system connection
Feed motor driving
cord, image drum
motor driving cord,
belt motor, fuser
driving cord
Check the connection condition of the
cables.
CU/PU board HOP connector
①
, DC ID
connector
, DCHEAT connector , BELT
connector
③
.
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.
Normalizethe
connection condition.
Replace the cable with
the normal cable.
Feed motor driving
cord, image drum
motor driving cord,
belt motor driving
cord
Check that any cable is not pinched during
assembling of the printer.
Pull out the CU/PU board BELT connector
③
, and check the following at the sides of
the cords:
Short circuit between pin-1 – FG
Short circuit between pin-2 – FG
Short circuit between pin-3 – FG
Short circuit between pin-4 – FG
Pull out the CU/PU board HOP connector
①
, and check the following at the side of the
cords:
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
thatnormalizesthe
connection condition.
Feed motor, belt
motor
Remove the respective connectors from
the board, and confirm that the following
resistance exists between the corresponding
pins, at the cable side.
CU/PU board HOP connector
①
Between pin-1-pin-2 Approx. 3.4 or approx.
5
.
Between pin-3-pin-4 Approx. 3.4
or approx.
5
.
CU/PU board BELT connector
③
Between pin-1-pin-2 Approx. 6.1 or approx. 3.5 .
Between pin-3-pin-4 Approx. 6.1 or approx. 3.5 .
Between pin-5-pin-6 Approx. 3.4
or approx. 5 .
Between pin-7-pin-8 Approx. 3.4
or approx. 5 .
Replace paper feed
motor, belt motor, ID
Up motor.
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