Brother MFC-9125CN User Manual page 196

f
Put the toner cartridge firmly into the
new drum unit until you hear it lock into
place.
h
IMPORTANT
Make sure that you put in the toner
cartridge properly or it may separate from
the drum unit.
180
g
Slide the drum unit and toner cartridge
assembly into the machine. Make sure
that you match the toner cartridge color
to the same color label on the machine.
C
M
Y
K
C-Cyan M-Magenta Y-Yellow K-Black
h
Close the top cover of the machine.