White Spot - Samsung SCX-82x0 series Service Manual

7.3.3 White spot

A. Typical faulty images yp
B. Troubleshooting procedure B Troubleshooting procedure
Step Section
1 Image check
2
3 Imaging unit
4
5
6 Toner cartridge
7 Transfer roller unit
8 Paper path
9 HV terminal
10 DADF
11 Original glass
Service Manual
y g
There are void areas at
side or high density sec
There is void area at th
section. section
Developing bias contac
makes good connection
The surface of the OPC
scratched or contamina scratched or contamina
Dirty on the outside.
Foreign matter or cake
the toner cartridge.
Transfer roller is dirty o
scratched.
There is foreign matter
path.
HV output is abnormal.
DADF pad is dirty.
Original glass is dirty.
7.Troubles shooting
Check item m
t the front
ction.
he rear side
ct terminal
n
C drum is
ated. ated
d toner in
or
on paper
7-1 13
Result Action
Yes 1. Change paper to one
just
unwrapped from its
Yes
package.
2. Print the image on
recycled paper mode.
No Clean contact terminal
and check terminal
position.
Yes Change imaging unit.
Yes Clean.
Yes Remove foreign matter.
nd
Yes Change 2
transfer roller unit.
Yes Remove foreign matter.
Yes Change the HVPS board.
Yes Clean.
Yes Wipe the surface clean
with a soft cloth. with a soft cloth
SAMSUNG ELECTRONICS
image