Brother HL-4040CN Service Manual page 266

Setting the serial number
(1) Connect the computer to the machine with the USB cable.
(2) Double-click the brmainte.EXE file (maintenance utility) which has been copied in the
"hl4000" folder to start.
(3) Select "Input Information" from Menu. Select the applicable model name.
(4) Check the port (USB) that the machine is connected through and click "Serial No." in
the lower box.
Enter the serial number (the last nine digits) of the machine into the box on the right
hand side. The serial number is shown in the window, and check that it is correct.
Click the OK button.
Note:
Refer to Appendix 3 to know how to read the serial number of the machine.
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