Brother HL HL-1060 Service Manual page 74

I-6 Black vertical streaks
Possible cause Step
Corona failure
Corona failure
Dirt in the paper
feed system
Scratch on the
drum
Cleaning failure
Scratch on the
heat roller
Note: Is you print the same pattern continuously, the drum will be worn away and black
vertical streaks appear on the paper.
I-7 Black and blurred horizontal stripes
Possible cause Step
Scratch on the
drum
Toner stuck on
the developer
roller
Scratch on the
fixing roller
SR PCB
Black and blurred vertical streaks
Check
1 Is the corona wire dirty?
2 Is the vertical block streak
about 10mm wide?
Is the corona wire cleaner not in
its home position?
3 Is the paper tray or feed system
on the drum unit soiled with
toner?
4 Is the drum surface scratched?
5 Is the drum surface dirty with
toner in streaks?
6 Is the surface of the heat roller
scratched?
Check
1 Are the horizontal stripes at
94mm (OPC drum) intervals?
2 Are the horizontal stripes at
25mm (developer roller)
intervals?
3 Are the horizontal streaks at
63mm (heat roller) intervals?
4 Is the problem solved after the
SR PCB replaced?
CHAPTER IV -10
Result Remedy
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 fixing
unit.
Result Remedy
Yes Replace the drum unit.
Yes Print several sheet and see
what happens.
The problem will disappear
after a while. If not, replace the
drum unit.
Yes Replace the fixing unit.
Yes Replace the SR PCB.
HV.GND
contacts
j
(Fig.4-5)