Blank Copy , Black Copy - Samsung SCX-82x0 series Service Manual

7.3.9 Blank copy , Black copy

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 Image check
2 Imaging unit
3
4 High voltage unit
5 5 M i Main controller t ll
6
Service Manual
7.Troubles
Blank copy
Check item
A blank copy occurs.
A black copy occurs
Coupling of imaging unit
mechanism is installed
properly.
The OPC drum charge c
voltage contact of OPC d
ground contact of the im
unit is connected proper
Connector is connected
properly.
C Connector is connected t i
properly
The problem has been
eliminated through the c
step 5.
shooting
Black copy
Result
Yes
Yes
t drive No
corona No
drum
aging
rly.
No
t d No N
No
heck of
7-1 19
Action
Check LSU connector for
proper connection.
Check HVPS connector for
proper connection, especially,
Corona Charger and Grid
Voltage
Check and correct drive
transmitting coupling. Change
imaging unit.
Check, clean, or correct the
contact.
Reconnect.
Reconnect the cable R t th bl
between video control board
and engine control board
Change high voltage unit.
 Change printer control
board
 Change LSU.
To be continued on next page...
SAMSUNG ELECTRONICS