Brother HL-1040, HL-820, HL-1020 manual Gray background, Hollow print

I-17

Gray background

Note:

This problem may appear on the first 10 to 20 pages immediately after replacing the toner cartridge.

Possible cause	Step	Check	Result	Remedy
Print paper	1	Does the paper being used	No	Recommend to change the
		meet the paper specification		paper to a specified type of the
		(weight, etc.).		paper.
			Yes	Recommend to change the
				paper to a fresh pack paper.
Drum unit	2	Is the problem solved after	Yes	Replace the drum unit.
		replacing the drum unit?
			No	Replace the high-voltage
				power supply PCB.

Note: The following cases increase the possibility of this problem.

1)The drum unit is at the end of its life.

2)There is dust or paper powder.

3)A large amount of paper whose width is narrower than A4 is printed.

4)Acid paper is being used.

I-18

Hollow print

Possible cause	Step	Check	Result	Remedy
Print paper	1	Is thick paper of more than	Yes	Recommend to use the
		42lb being used or extremely		specified type of paper.
		rough surface paper?
			No	Refer and compare with I-14.

IV-16