Brother MFC MFC-9120CN User Manual page 184

h
Put the new toner cartridge firmly into
the drum unit until you hear it lock into
place.
h
Note
Make sure that you put in the toner
cartridge correctly or it may separate from
the drum unit.
172
i
Slide the drum unit and toner cartridge
assembly into the machine. Make sure
that you match the toner cartridge colour
to the same colour label on the machine.
C
M
Y
K
C-Cyan M-Magenta Y-Yellow K-Black
j
Close the top cover of the machine.