Brother DPC-8060 Service Manual page 355

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(I-6) Black and blurred vertical streaks
Possible cause
Step
Dirt on the
1
ADF glass
Corona failure
2
3
Dirt in the
4
paper feed
system
Scratch on the
5
drum
Cleaning
6
failure
Scratch on the
7
heat roller
NOTE:
• If you print he same pattern (especially vertical streaks) continuously, electrostatic charge
performance of the drum will decrease temporarily and black vertical streaks may appear on the
paper
• This problem may occur with noise due to the corona wire being dirty. In that case, clean the
corona wire with the wire cleaner.
User Check
(1) The ADF glass is dirty. Clean the ADF glass.
(2) Clean the corona wire in the drum unit.
(3) Check that the wire cleaner is at the home position.
(4) Check that the toner cartridge is not empty.
(5) The drum unit may be damaged. Install a new drum unit.
(6) The toner cartridge may be damaged. Install a new toner
cartridge.
Check
Is the ADF glass dirt?
Is the corona wire dirty?
Is the vertical block streak
about 10mm wide?
(Check if the wire cleaner
is at its home position.)
Is the paper tray or feed
system on the drum unit
dirty with toner?
Is the drum surface
scratched?
Is the drum surface dirty
with toner in streaks?
Is the surface of the heat
roller scratched?
9-33
Result
Remedy
Yes
Clean the ADF glass.
Yes
Clean the corona wire with the
wire cleaner.
Yes
Return the wire cleaner to its
home position.
Yes
Clean the toner off.
Yes
Replace the drum unit.
Yes
Replace the drum unit.
Yes
Replace the fuser unit.
Confidential

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