Brother DCP7010 Service Manual page 259

(3) MFC7420/7820N
Press the * and # keys at the same time when the machine is on standby. The firmware
version appears on the LCD.
DCP7010/7020/7025
Press the Menu and Start keys. Next press the
the maintenance mode.
Press the key several times to display 8 on the LCD and then press the Set key. Again press
the key several times to display 0 and press the Set key.
Press the Start key several times to display the firmware version.
In this example, if "A0307252244:CF30" appears, it means that the downloading 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 downloading finishes abnormally, turn the machine off and on. The machine automatically
enters the write mode and emits a large beep. Perform the writing procedure above again.
key four times to make the machine enter
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