Oki B721

Oki Data CONFIDENTIAL
45487001TH Rev.1
6-54 /
6. Troubleshooting procedure
(6-3) Jamoccursinthemiddleofpaperrunningpath.
Check item Check work
Actions to be taken
at NG
(6-3-1) Motor operation check
ID motor Confirm that the paper feed 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/CU board,
or replace
ID motor, or
replace the ID
unit .
If any attempt
of using new
ID unit as a
trial is going
to be made,
be sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
(6-4) Jamoccursimmediatelyafterpaperhasreachedthefuser.
Check item Check work
Actions to be taken
at NG
(6-4-1) 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 board.
Replace the
fuser motor.
Replace the
fuser unit.
If any attempt of
using new fuser
unit as a trial
is going to be
made, be sure to
use the System
Maintenance
Menu FUSE
KEEP MODE.
(6-4-2) Temperature control
Detected
temperatures of the
fuser
Check temperatures detected at the fuser 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 board.
If any attempt
of using new
fuser unit as
a trial is going
to be made,
be sure to use
the system
maintenance
menu FUSE
KEEP MODE.
(6-4-3) 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
a printer.