Brother HL-4040CN Service Manual page 297

Press two buttons when turning the machine on
Panel Operation
OK Back
OK (+)
Go Back
( - ) (+)
( - ) OK
Go OK
Go Cancel
Cancel Back
Engine Non-startup Mode
This mode is to start-up the machine without using the engine. When the error related to
the engine occurs, you can ignore the error and get the error history or the other counter
information though it is impossible to print. When the machine doesn't work in case that
the connection failure between the Main controller and the Engine controller occurs, it is
possible to update the Main controller itself to recover from the failures.
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.
Flash Rom Updates Mode
(UPD file/ Model classification is not available)
Not Used
Engine Non-startup Mode
Line Test Mode (Don't use)
HVPS Check Mode (Don't use)
Not Used
Flash Rom Updates mode
(UPD file/ Model classification is available.)
Drum Unit Cleaning Mode
5-27
Function
(Don't use)
Confidential