Troubleshooting
4-5
Samsung Electronics
All black in
printing area?
Is the
Hsync/ signal received
in LSU?
Is Main high
Voltage supplied
from HVPS?
Does the
video data line to LSU
transit to High/ Low when
printing?
Replace LSU.
Check the path among video
controller, engine board,
HVPS, LSU for the shortage
or open. -> Repair or replace
the boards.
Replace LSU.
NO
NO
Is C/R
well connected to
Main high voltage
terminal?
NO
Repair orReplace HVPS.
Repair orReplace terminal.
NO
NO
YES
YES
YES
YES
4-3-2 All Black
Download Service Manual And Resetter Printer at http://printer1.blogspot.com