Brother MFC-9450CDN User Manual page 175

Note
The drum unit is a consumable item, and
it is necessary to replace it periodically.
There are many factors that determine the
actual drum life, such as temperature,
humidity, type of paper and how much
toner you use for the number of pages per
print job. The estimated drum life is
approximately 17,000 pages. The actual
number of pages your drum will print may
be significantly less than these estimates.
Because we have no control over the
many factors that determine the actual
drum life, we cannot guarantee a
minimum number of pages that will be
printed by your drum.
Replacing the drum unit
CAUTION
Wait to unpack a new drum unit until
immediately before installing it. Put the old
drum unit into the plastic bag.
HOT SURFACE
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.
Troubleshooting and routine maintenance
a
Turn off the machine's power switch.
Press the front cover release button and
then open the front cover.
C
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