Brother DCP-9055CDN - Manual (Page 77)

Routine maintenance
69
A
h
Hold the handle of the toner cartridge
and slide the toner cartridge into the
drum unit then slightly pull it toward you
until you hear it click into place. Make
sure that you match the toner cartridge
colour to the same colour label on the
drum unit. Repeat this for all the toner
cartridges.
i
Push the drum unit in until it stops.
j
Close the front cover of the machine.
C - Cyan M - Magenta
Y - Yellow K - Black
C
M
Y
K