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