Brother DCP-9045CDN - Manual (Page 152)

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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.
g
Put the belt unit back in the machine.
Match the h mark on the belt unit to the
g
mark on the machine. Push down on
the green area of the belt unit to lock it in
place.