Brother Copier/Printer MFC-9970CDW - Manual (Page 112)

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g
Hold the green handle of the waste toner
box and remove the waste toner box
from the machine.
CAUTION
Handle the waste toner box carefully in
case you accidentally spill or scatter toner.
If toner scatters on your hands or clothes,
immediately wipe or wash it off with cold
water.
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 disposal
office.
h
Unpack the new waste toner box and
put the new waste toner box in the
machine using the green handle. Make
sure the waste toner box is level and fits
firmly into place.