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Brother HL-1070 - B/W Laser Printer Service Manual page 77

Service manual
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I-13
Faint print
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Possible cause
Step
Printer not level
1
Drum unit
2
Scanner window
3
dirty
Scanner unit
4
failure
I-14
White spots
Possible cause
Step
Toner cartridge
1
Print paper
2
Environment
3
Check
Is the printer placed
horizontally?
Does the problem happened
immediately after replacing the
drum unit with a new one?
Is the window of the laser
scanner dirty?
Is the problem solved by
replacing the scanner unit?
Check
Is the toner in the toner
cartridge almost empty?
Is the problem solved after
change to specified of fresh
unpacked paper?
Check if the problem still
appears after the printer has
warmed up.
IV-13
Result
Remedy
No
Place the printer on a flat
surface.
Yes
Remove and shake the drum
unit horizontally with care.
Yes
Clean the scanner window with
a dry tissue.
Yes
Replace the scanner unit.
Result
Remedy
Yes
Shake the drum unit
horizontally. Replace the toner
cartridge with a new one.
No
Replace the drum unit.
Yes
Recommend the user to
change the paper.
(Damp (wet) paper might be
used.)
Yes
Replace the drum unit.
Advise the user of the
specified print environment.

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