Brother HL-1020, HL-820, HL-1040 manual Dirt on the back of paper

I-5

Dirt on the back of paper

Possible cause	Step	Check	Result	Remedy
Fixing unit	1	Is the pressure roller dirty?	Yes	Clean the pressure roller.
		Is any other area in the printer		(See the following note.)
		dirty?
Dirt in the drum	2	Is the transfer roller dirty?	Yes	Replace the drum unit
unit		Is the problem solved after the
		drum unit is replaced?
			No	Replace the high-voltage
				power supply PCB.

Note: Clean the pressure roller as follows;

(1)Set three or more sheets of paper in the MP sheet feeder.

(2)Open the top cover.

(3)Turn on the power switch while holding down the switch on the control panel.

(4)Release the panel switch when the Drum lamp is on.

(5)Close the top cover.

(6)Hold down the panel switch until the Ready lamp is on, then release the switch.

(7)Print three patterns; grid, zip and solid black.

(8)Turn off the power switch with the top cover closed.

(9)Set paper in the manual slot with the solid black side up.

(10)Turn on the power switch while holding down the switch on the control panel.

(11)Release the panel switch when the Drum lamp is on.

(12)Press the panel switch again and release it immediately.

(13)Print a page of test pattern while cleaning the pressure roller.

IV-9