Brother MFC-7340 User Manual page 139

To prevent damage to the machine caused
by static electricity, DO NOT touch the
electrodes shown in the illustration.
c
Push down the green lock lever and take
the toner cartridge out of the drum unit.
CAUTION
To avoid print quality problems, DO NOT
touch the shaded parts shown in the
illustrations.
Wait to unpack a new drum unit until
immediately before you put it in the
machine. Exposure to direct sunlight or
room light may damage the drum unit.
Troubleshooting and routine maintenance
Note
Be sure to seal up the used drum unit
tightly in a bag so that toner powder does
not spill out of the unit.
d
Unpack the new drum unit.
e
Put the toner cartridge firmly into the
new drum unit until you hear it lock into
place. If you put the cartridge in
properly, the green lock lever will lift
automatically.
CAUTION
Make sure that you put in the toner
cartridge properly or it may separate from
the drum unit.
f
Clean the primary corona wire inside the
drum unit by gently sliding the green tab
from right to left and left to right several
times.
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