Oki MC561, Maintenance Manual, Page: 247 / 276

44473001TH Rev.1
247 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
7.5.5 (1) Color is faint and fades across pages (see Fig. 7-2 A).
(1-1) Color is faint and fades.
Check item Check operation Actions for NG
results
(1-1-1) Toner
Remaining toner
amount
Check the operator panel if it displays “Prepare
to replace the toner cartridge” or “Replace the
toner cartridge.”
Replace any
applicable toner
cartridge with
a new toner
cartridge.
Tape at the toner
cartridge opening
Check to make sure that the tape is removed
from each toner cartridge opening.
Move the toner
cartridge lever
to the closed
position and
remove any
applicable
tape from the
opening.
(1-1-2) LED head
LED head lens Check the LED head lens if its surface is dirty
with toner or paper dust.
Clean them with
soft tissue paper.
LED head attaching
state
Check the LED head if it is properly set into the
LED head holder. Check the tension spring on
the both sides if they are set properly.
Correct them
so that they are
properly set.
(1-1-3) Print media
Media type Check if the media used for printing is especially
thick.
Use standard
paper.
Check item Check operation Actions for NG
results
(1-1-4) High-voltage terminal
ID unit terminal Visually check each ID unit high-voltage terminal
if it contacts the contact assembly properly. (See
Fig. 7-3.)
Replace any
applicable ID unit
or correct any
applicable high-
voltage terminal.
When using a
new ID unit as a
try, select FUSE
KEEP MODE
of the system
maintenance
menu.
(1-1-5) ID unit installation state
ID unit down
position (transfer
error)
Take out and insert each ID unit by hand to check
that there is no abnormal load and it goes down
to normal down position. If the top end of a sheet
of paper inserted between the drum and the
belt is bent easily, it means improper installation
state.
Check the
U-groove
of the side
plate for any
abnormality.
If it is not
repairable,
replace the
unit.