Brother MFC-9840CDW User Manual page 170

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Using their colored handles to lift them
out, remove all four toner cartridges
from the drum unit.
CAUTION
To prevent damage to the machine from
static electricity, DO NOT touch the
electrodes shown in the illustration.
Handle the toner cartridges carefully. If
toner scatters on your hands or clothes,
wipe or wash it off with cold water at once.
160
To avoid print quality problems, DO NOT
touch the shaded parts shown in the
illustrations.