45530603TH Rev.2
4-68
Oki Data CONFIDENTIAL
4. TROUBLESHOOTING PROCEDURE
(7-3)
Jam occurs in the middle of paper running path.
Check item
Check work
Actions to be taken
at NG
(7-3-1) Motor operation check
Feed motor driver,
belt motor driver
and fuser motor
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
hopping motor
or belt motor, or
the belt unit.
Feed motor, belt
motor
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
Several M
:
between pin-5 – FG
Replace the
PU/CU PCB.
(7-4)
Jam occurs immediately after paper has reached the fuser.
Check item
Check work
Actions to be taken
at NG
(7-4-1) Motor operation check
Fuser motor
Confirm that the fuser motor works normally
by using the Motor & Clutch Test of the self-
diagnostic mode.
Check if any load exists or not.
Replace the PU/
CU PCB, fuser
motor, fuser unit,
and/or fuser
driver gear train
(oneway gear).
(7-4-2) Temperature control while fuser belt running
Detected
temperatures of the
fuser
Check temperatures detected at the fuser belt
in the self-diagnostic mode. Has abnormally
low (lower than the room temperature) or high
(250°C) temperature been detected?
Replace the
fuser unit or
PU/CU PCB.
(7-4-3) Check the installation condition of fuser unit
Fuser unit
Check that the fuser unit is installed normally.
(Is it pushed in down to the bottom-most
point?)
Install the fuser
unit correctly in
the printer.
