Brother HL1060 - B/W Laser Printer Service Manual page 80

I-16 Black bank
Possible cause Step
Drum unit
I-17 Gray background
Possible cause Step
Density dial
Print paper
Drum unit
Note: The following cases raise the possibility of this problem.
1.
2.
3.
Check
1 Is the wire cleaner positioned at
its home position?
Check
1 Is the problem corrected by
adjusting the density dial?
2 Does the paper being used
meet the paper specification
(weight, etc.).
3 Is the problem solved after
replacing the drum unit?
The drum unit is at the end of its life.
There is dust or paper powder.
A large number of paper whose width is narrower than A4 is printed.
CHAPTER IV -16
Result Remedy
No Return the wire cleaner to its
home position.
Yes Replace the drum unit.
Result Remedy
Yes Adjust the dial to the most
suitable position.
No Recommend to change the
paper to a specified type of the
paper.
Yes Recommend to change the
paper to a fresh pack paper.
Yes Replace the H.V. power supply.
Replace the drum unit.