Brother MFC5890CN Service Manual page 367

(3) On your PC, run "filedg32.exe."
The Filedrgs window will appear as shown below.
(4) Drag and drop the firmware (e.g., lz0023_a.pmu) onto the Brother Maintenance USB
Printer driver icon in the Filedrgs window.
Note: To use a firmware file, extract it beforehand by double-clicking. It is a self-
extracting file having the extension .exe.
After approx. 2 to 5 minutes, the loading operation is complete and the machine
automatically reboots and returns to the standby state.
(5) Display the version of the firmware installed on the LCD by simultaneously pressing
the * and # keys to check it.
Sample version number shown on the color LCD:
(The top line shows the version number.)
If the displayed version number is identical with the firmware version you installed,
the loading operation has been successfully finished.
Note: If loading operation ends abnormally, turn the machine off and on. Wait for the
machine to emit a long beep and automatically enter the firmware loading mode, and then
perform the loading procedure above again.
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