Oki MC351

44473001TH Rev.1
249 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
(2-2) The white area of printed pages is dirty (all over).
Check item Check operation
Actions for NG
results
(2-2-1) Print media
Media type Is the media used for printing is especially thick? Use standard
paper.
(2-2-2) 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.
7.5.5 (3) Printed pages are blank (see Fig. 7-2 C).
(3-1) A printed pages are entirely blank.
Check item Check operation
Actions for NG
results
(3-1-1) Toner state
Remaining toner
amount
Check if the amount of toner remaining in toner
cartridges is sufficient.
Replace any
toner cartridge
with little toner.
(3-1-2) Exposure state
LED head Check each LED head and relevant drum if they
face each other at a correct position when the
cover is closed. Check each LED head’s light-
emitting face for anything that blocks emission of
light.
Correct the LED
head position.
LED head
connection state
Check LED heads if they are connected properly. Replace any
applicable LED
head.
Drum shaft Are drum shafts installed in a manner that they
contact the side plates on both sides correctly?
Replace any
applicable ID
unit. When
using a new ID
unit as a try,
select FUSE
KEEP MODE
of the system
maintenance
menu.
CU/PU board fuse
F501 (C530/C330),
F6 (C510/C310)
Measure resistance values of F501 (C550/C330)
and F6 (C510/C310).
1
or less : Normal
1 or more: NG
Replace the
CU/PU board.