Oki B721

Oki Data CONFIDENTIAL
45487001TH Rev.1
6-34 /
6. Troubleshooting procedure
(2-3) Bad odors are generated.
Check item Check work
Actions to be taken
at NG
(2-3-1) Locating the exact position of generating bad odor
Fuser unit Remove the fuser unit and check the odor. Implement
section (2-3-2).
Low voltage power
supply unit
Remove the low voltage power supply unit
and check the odor.
Replace the low
voltage power
supply unit
(2-3-2) Check conditions of the fuser unit
Life count of fuser
unit
Check the life count of the fuser unit by using
the self-diagnostic mode.
The fuser close
to the new fuser
unit smells some
odors.
Check that no
foreign material
exists in fuser unit.
Check that no foreign materials such as paper
are stuck inside of the fuser unit.
Remove the
foreign material.
(2-4) Rise-up time is slow.
Check item Check work
Actions to be taken
at NG
(2-4-1) Check the fuser unit
Heater Confirm the voltage specification on the label
on the rear of the fuser unit.
Replace the
fuser unit.
(2-4-2) Check the optional parts Note!
Add-on memory Install the optional parts (add-on memory)
again and re-check the operations.
Replace the
optional part.
SD memory casd Install the optional part (SD memory card)
again and recheck the operations.
Replace the
optional part.
Note! If any troubles such as printer does not start up normally occurs, remove the CU
options (RAM, SD memory card) and check if the trouble symptom changes or not.