Brother MFC640CW Service Manual page 312

(3) MFC820CW/640CW
Press the * and # keys at the same time when the machine is on standby. T he firmware
version appears on the LCD.
DCP340CW
Press the Me nu and Mono Start keys. Next press the
machine enter the maintenance mode.
Press the key several times to display 8 on the LCD and then press the Se t key. Again
press the key several times to display 0 and press the Se t key. (See
8.4.21.)
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.
(4) If loading finishes abnormally, turn the machine off and on. T he machine automatically
enters the load mode and emits a large beep. Perform the loading procedure above again.
Ap p. 2-8
key four times to make the
Chapter 8, Section
Confidential