Brother DCP 9040CN - Manual (Page 132)

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d
Hold the green parts of the belt unit with
both hands and lift the belt unit up, then
pull it out.
CAUTION
We recommend that you place the belt unit
on a clean, flat surface with a piece of
disposable paper underneath it in case you
accidentally spill or scatter toner.
e
Remove the waste toner box from the
machine using the green handle.
Note
Discard the used waste toner box
according to local regulations, keeping it
separate from domestic waste. If you have
questions, call your local waste
disposable office.
f
Unpack the new waste toner box and
put the new one in the machine using
the green handle.