Dell 2355DN Service Manual - Page 86

Dark Image, Same at Normal? - replace toner

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Dark Image Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Alignment and Troubleshooting NO Dark selected via RCP? YES Change to Normal and test NO Same at Normal? YES Works correctly NO with -450V of Bias voltage? YES Works correctly after NO replaced LSU? YES The power of LSU is set high or internal problem -> Replace LSU or adjust volume END Repair or replace the defective component Toner over supply due to the adjustment fault of metering blade in toner cartridge -> Replace toner cartridge 4-46 Service Manual

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Alignment and Troubleshooting
4-46
Service Manual
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