Jam Occurs In The Middle Of Paper Running Path - Oki C710 Maintenance Manual

Oki Data CONFIDENTIAL
Check item
(6-2-4) Check the system connection
Paper feed motor Check the connection condition of the cables.
drive cable, ID PU board HOPSIZE connector
motor drive cable, connector
belt motor drive UP connector
cable, ID Up motor Check if the connector is connected in the half-
drive cable, fuser way only or not, and check if the connector is
motor drive cable inserted in a slanted angle or not.
Check also that cables are assembled without
any abnormality.
Paper feed motor Check that any cable is not pinched during
drive cable, ID assembling of the printer.
motor drive cable, Remove the BELT ID UP connector
belt motor drive board and check the followings at the connector
cable, ID Up motor side.
drive cable
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
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
Paper feed motor, Remove the respective connectors from the
belt motor, ID Up board, and confirm that the following resistance
motor exists between the corresponding pins, at the
cable side.
PU board HOPSIZE connector 1
Between pin-1 - pin-2 Approx. 3.4Ω or approx. 5Ω.
Between pin-3 - pin-4 Approx. 3.4Ω or approx. 5Ω.
PU board BELT ID UP connector 3
Between pin-1 - pin-2 Approx. 6.1Ω or approx. 3.5Ω.
Between pin-3 - pin-4 Approx. 6.1Ω or approx. 3.5Ω.
Between pin-5 - pin-6 Approx. 3.4Ω or approx. 5Ω.
Between pin-7 - pin-8 Approx. 3.4Ω or approx. 5Ω.
43856301TH Rev.3
Action to be taken
Check work
Normalize the
, DC ID connection
, DCHEAT connector , BELT ID condition.
, RELAY connector . Replace the
cable with the
normal cable.
Replace the
cable with the
of the PU good cable
that normalizes
the connection
condition.
of the PU
Replace paper
feed motor, belt
motor, ID Up
motor.

(6-3) Jam occurs in the middle of paper running path.

at NG
Check item
(6-3-1) Motor operation check
Paper feed motor
driver, belt motor
driver and ID motor
Paper feed motor,
belt motor
7. Troubleshooting and repair procedure
Check work
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.
Remove the BELT ID UP connector of the PU
board and check the followings at the connector
side.
Several MΩ between pin-5 – FG
Several MΩ between pin-6 – FG
Several MΩ between pin-7 – FG
Several MΩ between pin-8 – FG
Remove the HOPSIZE connector of the PU
board and check the followings at the connector
side.
Several MΩ between pin-1 – FG
Several MΩ between pin-2 – FG
Several MΩ between pin-3 – FG
Several MΩ between pin-4 – FG
Action to be taken
at NG
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.
Replace either
paper feed
motor, belt
motor or PU
board.
165 /