Oki C911 - Jam Occurs Immediately after a Paper Is Taken into Printer

45530603TH Rev.2
4-67
Oki Data CONFIDENTIAL
4. TROUBLESHOOTING PROCEDURE
(7-2) Jam occurs immediately after a paper is taken into printer.
Check item Check work
Actions to be taken
at NG
(7-2-1) Check condition of the paper running path
Paper running
path between the
registration roller 2
and the fuser
Check if paper is jammed or not in the paper
running path.
Remove the
jammed paper.
(7-2-2) Check condition of the mechanical parts
Check the sensor
lever of the paper
entrance sensor 3
and EXIT1/EXIT2/
EXIT3 sensors.
C heck if shape and movement of the sensor
levers have any abnormality or not.
Replace with a
normal sensor
lever.
(7-2-3) Motor operation check
Feed motor driver
and belt motor
driver
Confirm that the hopping motor, belt motor
and fuser motor work normally by using the
Motor & Clutch Test of the self-diagnostic
mode.
Check if any load exists or not.
Replace the
PU/ CU PCB,
the faulty motor
of either feed
motor or belt
motor, or the
belt unit.
Feed motor, REG2
Clutch
Remove the FDMRG2CL connector of the
PU/CU PCB and check the following at the
connector side.
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 PU/
CU PCB.
Check item Check work
Actions to be taken
at NG
(7-2-4) Check the system connection
Feed motor drive
cable, belt motor
drive cable, fuser
motor drive cable
Check the connection condition of the cables.
PU/CU PCB FDMRG2CL connector, DCBELT
connector, DCHEAT co nn ec to r
Visually check if each connector is connected
in the halfway only or not, is inserted in a
slanted angle or not.
Also check that cables are assembled without
any abnormality.
Normalize the
connection
condition.
Replace with a
normal cable.
Feed motor drive
cable, belt motor
drive cable,
registration clutch 2
driver cable
Check that any cable is not pinched during
assembling of the printer.
Remove the FDMRG2CL connector of the
PU/CU PCB and check the following 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
Short circuit between pin-5 – FG
Remove the DCBELT connector and check
the following at the cable side.
Short circuit between pin-1/-2/-3/-4/-5/-6/ and
FG
Short circuit between pin-2 – FG
Replace with a
normal cable
and normalizes
the assembled
condition.
Feed motor,
registration2 clutch
Remove the respective connectors from the
PCB, and confirm that the following resistance
exists between the corresponding pins, at the
cable side.
PU/CU PCB FDMRG2CL connector
Between pin-1 and pin-2: Approx. 3.4
:
Between pin-3 and pin-4: Approx. 3.4
:
PU/CU PCB
Between pin-5 and pin-6: Approx. 240
:
Replace the
feed motor or
belt motor.