Samsung CLX-9250ND - Page 509

7. Trouble
s
A. T
yp
ical fault
y
ima
g
es
7.3.12 Uneven density in main scan
d
yp y g
B. Troubleshooting procedure
Step Section Check item
1 Machine

LD
The problem has been
eliminated throu
g
h the L
D

LD
adjustment 
LD lightness
balance adjust.
g
lightness balance adjust.
2 Imaging unit The surface of the OPC
d
scratched.
3 Dirty on the outside.
4 LSU The surface of the LSU
w
is dirty.
5 Transfer roller Check that the spring do
e
come of during the press
u
operation of the transfer r
6 Transfer belt
it
Transfer belt unit makes
p
ttithlt il
un
it
con
t
ac
t
w
ith
p
l
a
t
es on ra
il
7 Is abnormality found in th
e
gear?
8 The problem has been
eliminated through the ch
steps up to 6.
Service Manual
CLX-9250/9350 series
7-1
s
hooting
d
irection (Vertical Band)
Result Action
D
No Go to next step.
d
rum is Yes Change imaging unit.
Yes Clean.
w
indow Yes Clean with cleaning jig.
e
s not
u
re
oller.
No Correct.
Change transfer roller unit.
p
ositive No Check and correct contacts.
s.
e
cam Yes Change transfer belt unit.
ecks of
No Change imaging unit.
 Change LSU.
 Change HVPS board.
SAMSUNG ELECTRONICS
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