Brother HL 3070CW - Manual (Page 149)

Routine Maintenance
139
5
g
Put the toner cartridge back firmly into the drum unit until you hear it lock into place.
Note
Make sure that you put in the toner cartridge properly or it may separate from the drum unit.
h
Slide each drum unit and toner cartridge assembly into the printer. Make sure that you match the toner
cartridge color to the same color label on the printer.
i
Close the top cover of the printer.
j
Turn the printer power switch back on.
C - Cyan
M - Magenta
Y - Yellow
K - Black
C
M
Y
K