Brother MFC620CN Service Manual page 251

6.4 IF YOU REPLACE THE INK ABSORBER BOX
Reset the purge counter to zero with the following procedure.
MFC620CN/425CN/420CN/410CN/215C/210C and FAX2440C
(1) Press the Menu/Set and Black Start keys. Next press
enter the maintenance mode.
(2) Press the 8 and 0 keys in this order in the initial stage of the maintenance mode.
(3) Press the Black Start key several times until the purge count appears on the LCD
(4) Press the 2, 7, 8, and 3 keys in this order to reset the purge count to zero.
(5) Press the Stop/Exit key to return to the initial stage of the maintenance mode.
(6) Press the 9 key twice to exit from the maintenance mode.
DCP315C/310CN/120C/115C/117C/110C
(1) Press the Menu and Mono Start keys. Next press the
enter the maintenance mode.
(2) Enter 8 and 0 by using the
(*To enter a numerical code on models having no numerical keypad, press the
display the numerical code to be entered and then press the Set key. Repeat this operation for each
numerical code.)
(3) Press the Mono Start key several times until the purge count appears on the LCD.
(4) Enter 2, 7, 8, and 3 by using the
(5) Press the Stop/Exit key to return to the initial stage of the maintenance mode.
(6) Enter 9 twice by using the
and Set keys.*
and Set keys to reset the purge count to zero.*
and Set keys to exit from the maintenance mode.*
6 - 2 9
key four times to make the machine
key four times to make the machine
key several times to
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