Brother HL-4040CN, HL-4050CDN, HL-4070CDW Service Manual page 301

Pressing the two buttons while the machine is in the ready state
Panel Operation
Go (+)
Go ( - )
Cancel Back
Drum Unit Cleaning Mode
This mode is to remove the dust attached on the exposure drum. When white spots
appear on the printout, perform this operation to remove the dust by using the drum
cleaning sheet.
<Operating Procedure>
(1) Load the drum cleaning sheet into the MP tray.
(2) Make sure that "Ready" appears on the LCD and press the Cancel and Back buttons
at the same time.
"DRUM CLEANING" will appear on the LCD.
(3) Press the Go button. The machine starts cleaning the drum unit. "DRUM CLEANING/
PLEASE WAIT" appears on the LCD during cleaning.
(4) When finishing cleaning normally, "DRUM CLEANING/ COMPLETE" appears on the
LCD.
(5) Press the Cancel button so that the machine returns to the ready state.
Pressing the two buttons while the front cover is opened
Panel Operation
Reprint Cancel
Cancel ( - )
Fuser Motor Speed Adjustment Mode
The problem such as dirt on the paper bottom or the unexpected print image due to a
paper crease may be occurred when printing the thin paper. This mode allows you to
change the speed of the fuser motor (Paper feed/belt cleaner motor ASSY) according to
the respective problems.
<Operating Procedure>
(1) Press the Cancel and
(2) "FU MOTOR SPEED" will appear on the LCD. Press the
the setting value and press the OK button.
- Dirt on the paper bottom
Increase the fuser motor speed. (Setting value: 1, 2, 3)
- Unexpected print image due to a paper crease
Reduce the fuser motor speed. (Setting value: -1, -2, -3)
Note:
Make sure to return the setting value to "0" after printing the thin paper.
Failure to do so may cause color misregistration or dirt on the paper.
Parts life reset mode for the periodical replacement parts
(Refer to "2.3 Parts Life Reset Function" in Chapter
USB transfer speed change mode in the PictBridge mode
(Refer to "1.4.11 USB Transfer Speed Change in the
PictBridge Mode (Function code
Drum Unit Cleaning Mode
Develop roller counter reset mode
(Refer to "2.2 Develop Roller Counter Reset
chapter.)
Fuser Motor Speed Adjustment Mode
buttons at the same time while the front cover is opened.
5-29
Function
45)"on this chapter.)
Function
Function"on this
or buttons to change
2.)
Confidential