HL-2030/2040/2070N SERVICE MANUAL
Confidential
7-31
I-5 Dirt on the back of paper
Possible cause Step Check Result Remedy
Fixing unit dirty 1 Is the pressure roller dirty?
Is any other area in the printer
dirty?
Yes
Clean the pressure roller
referring to the following
procedure.
Yes Replace the drum unit Dirt in the drum
unit
2 Is the transfer roller dirty?
Is the problem solved after
replacing the drum unit?
No Replace the high-voltage power
supply PCB.
NOTE:
This problem may disappear after printing approximately 10 pages of completely blank sheets.
How to clean the pressure roller
Clean the pressure roller as follows;
(1) Set 5 or more sheets of paper in the paper tray.
(2) Open the front cover, and turn on the power switch while holding down the Go button.
(3) All LEDs light up, and keep the Go button pressed down until the Ready LED goes off.
Then, release the Go button and make sure that all LEDs are off.
(4) Press the Go button once and make sure that Toner, Drum and Paper LEDs light up.
(5) Press the Go button twice and wait for two seconds. Then, the printer starts printing the
grid pattern continuously.
(6) Close the front cover, print approximately 5 pages and keep holding down the Go button
until the Toner, Drum and Paper LEDs light up. Release the Go button so that the Paper
and Ready LEDs blink alternately. After two seconds, the Ready LED lights up and is off.
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