Brother MFC620CN Service Manual page 372

(3) MFC620CN/425CN/420CN/410CN/215C/210C and FAX2440C
Press the * and # keys at the same time when the machine is on standby. The firmware version
appears on the LCD.
DCP315CN/310CN/120C/117C/115C/110C
Press the Menu and Mono Start keys. Next press the
enter the maintenance mode.
Press the key several times to display 8 on the LCD and then press the Set key. Again press
key several times to display 0 and press the Set key. (See
the
Press the Mono Start key several times to display the firmware version.
In this example, if "A0307252244:CF30" appears, it means that the loading has been
successfully finished.
NOTE: The latest firmware will display its version on the LCD by pressing the Stop and
keys at the same time.
(4) If loading finishes abnormally, turn the machine off and on. The machine automatically enters
the load mode and emits a large beep. Perform the loading procedure above again.
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key four times to make the machine
Chapter 8, Section 8.5.21.)
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