Brother DCP-9020CDW Basic User's Manual page 85

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The colour of printed dots is the colour of
the drum you should clean. Remove the
toner cartridge and drum unit assembly
of the colour causing the problem.
WARNING
HOT SURFACE
After you have just used the machine, some
internal parts of the machine will be
extremely hot. Wait for the machine to cool
down before you touch the internal parts.
Routine maintenance
IMPORTANT
• We recommend that you place the toner
cartridge and drum unit assembly on a
clean, flat surface with disposable paper
underneath it in case you accidentally spill
or scatter toner.
• To prevent damage to the machine from
static electricity, DO NOT touch the
electrodes shown in the illustration.
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