Jam Occurs In The Middle Of Paper Running Path - Oki C711 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 motor CU/PU board HP_PSZCL connector
drive cable, belt connector
motor drive cable, UP connector
ID Up motor drive Check if the connector is connected in the half-
cable, fuser motor way only or not, and check if the connector is
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 motor assembling of the printer.
drive cable, belt Remove the BELT ID UP connector
motor drive cable, ID CU/PU board and check the followings at the
Up motor drive cable 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 HP_PSZCL connector
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
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.
CU/PU board HP_PSZCL connector
Between pin-1 - pin-2 Approx. 3.4Ω or approx. 5Ω.
Between pin-3 - pin-4 Approx. 3.4Ω or approx. 5Ω.
CU/PU board BELT ID UP connector
Between pin-1 - pin-2 Approx. 6.1Ω or approx. 8.5Ω.
Between pin-3 - pin-4 Approx. 6.1Ω or approx. 8.5Ω.
Between pin-5 - pin-6 Approx. 3.4Ω or approx. 5Ω.
Between pin-7 - pin-8 Approx. 3.4Ω or approx. 5Ω.
44205401TH Rev.1
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 good cable
that normalizes
the connection
condition.
of the CU/
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
CU/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 HP_PSZCL connector of the
CU/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
CU/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 CU/PU board.
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