Brother MFC-9840CDW User Manual page 110

After you have just used the machine, some
internal parts of the machine will be extremely hot.
When you open the front or back cover of the
machine, DO NOT touch the shaded parts shown
in the illustration.
The fuser unit is marked with a caution label. DO
NOT remove or damage the label.
To prevent injuries, be careful not to put your
hands on the edge of the machine under the
document cover as shown in the illustration.
To prevent injuries, DO NOT put your fingers in the
area shown in the illustration.
DO NOT use a vacuum cleaner to clean up scattered toner. Doing this might cause the toner
dust to ignite inside the vacuum cleaner, potentially starting a fire. Please carefully clean the
toner dust with a dry, lint-free cloth and dispose of it according to local regulations.
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