Resetting The Drum Counter - Brother MFC-7240 Basic User's Manual

f
Put the toner cartridge firmly into the
new drum unit until it locks into place. If
you put the cartridge in correctly, the
green lock lever will lift automatically.
Note
Make sure that you put in the toner
cartridge correctly or it may separate from
the drum unit.
g
Put the new drum unit and toner
cartridge assembly in the machine.

Resetting the drum counter

When you replace the drum unit with a new
one, you need to reset the drum counter by
completing the following steps:
64
a
Press Clear. 
To confirm you are installing a new drum
unit, press 1.
b
When the LCD shows Accepted, close
the front cover.
A