Brother HL-4040CN, HL-4050CDN, HL-4070CDW Service Manual page 271

(1) Copy the necessary program file (Engine firmware) to the USB flash memory drive.
(2) Connect the USB flash memory drive to the USB direct interface on the front of the
machine.
(3) When the machine has recognized the USB flash memory drive, the "Checking device/
Please wait" message appears on the LCD.
(4) "Direct Print" is displayed on the first line of the LCD message, and the file names will
be shown on the second line of the LCD. Press the
necessary program file, and press the OK button.
(5) "Program Update/ Press Go" appears on the LCD. Press the OK or Go button to start.
"Program Updating/ Do not turn OFF" message appears on the LCD with Data LED
blinking while rewriting the firmware. DO NOT turn off the machine.
(6) After the completion of the firmware rewriting, "Direct Print" is displayed on the first line
of the LCD message, and the file names will be shown on the second line of the LCD
again.
(7) Remove the USB flash memory drive from the USB direct interface once the update
have finished.
Note:
- You can check the firmware version of the Engine firmware by printing the
Settings ("2.3 Printout of Printer Settings" in Chapter
- If rewriting the firmware using a USB flash memory drive fails, turn the power of the
machine off and on. Follow the steps (1) to (7) again.
Fig. 4-2
or
5).
4-13
button to choose the
Printer
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