Alignment & Troubleshooting
Service Manual
4-74
Samsung Electronics
Dark Image
Dark selected
via
RCP?
Change to
Normal
and test
Works correctly
with -450V of Bias
voltage?
Works
correctly after
replaced LSU?
Repair or replace the defective
component
The power of LSU is set
high or internal problem
-> Replace LSU or adjust
volume
Same at
Normal?
END
NO
NO
NO
Toner over supply due to the
adjustment fault of metering
blade in toner cartridge
-> Replace toner cartridge
NO
YES
YES
YES
YES
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