44015503TH Rev. 1
197 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURE
Check item Check work
Action to be taken
at NG
(6-2-4) Check the system connection
Paper feed motor
drive cable, ID
motor drive cable,
belt motor drive
cable, ID Up motor
drive cable, fuser
motor drive cable
Check the connection condition of the cables.
PU board HOPSIZE connector
, DC ID
connector , DCHEAT connector , BELT ID
UP connector , RELAY 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.
Normalize the
connection
condition.
Replace the
cable with the
normal cable.
Paper feed motor
drive cable, ID
motor drive cable,
belt motor drive
cable, ID Up motor
drive cable
Check that any cable is not pinched during
assembling of the printer.
Remove the BELT ID UP connector
of the PU
board and check the followings at the connector
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
Short circuit between pin-5 – FG
Short circuit between pin-6 – FG
Short circuit between pin-7 – FG
Short circuit between pin-8 – FG
Remove the HOPSIZE connector
of the 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,
belt motor, ID Up
motor
Remove the respective connectors from the
board, and confirm that the following resistance
exists between the corresponding pins, at the
cable side.
PU board HOPSIZE connector 1
Between pin-1 - pin-2 Approx. 3.4
Ω
or approx. 5
Ω
.
Between pin-3 - pin-4 Approx. 3.4
Ω
or approx. 5
Ω
.
PU board BELT ID UP connector 3
Between pin-1 - pin-2 Approx. 6.1
Ω
or approx. 3.5
Ω
.
Between pin-3 - pin-4 Approx. 6.1
Ω
or approx. 3.5
Ω
.
Between pin-5 - pin-6 Approx. 3.4
Ω
or approx. 5
Ω
.
Between pin-7 - pin-8 Approx. 3.4
Ω
or approx. 5
Ω
.
Replace paper
feed motor, belt
motor, ID Up
motor.
(6-3) Jam occurs in the middle of paper running path.
Check item Check work
Action to be taken
at NG
(6-3-1) Motor operation check
Paper feed motor
driver, belt motor
driver and ID motor
Confir
m 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.
Replace the
PU board, or
replace the
defective motor
among paper
feed motor,
belt motor and
ID motor, or
replace the ID
unit or belt unit.
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
Remove the BELT ID UP connector of the PU
board and check the followings at the connector
side.
Several M
Ω
between pin-5 – FG
Several M
Ω
between pin-6 – FG
Several M
Ω
between pin-7 – FG
Several M
Ω
between pin-8 – FG
Remove the HOPSIZE connector
of the 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 either
paper feed
motor, belt
motor or PU
board.
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