Cleaning The Corona Wires - Brother MFC-9440CN User Manual

Cleaning the corona wires

If you have print quality problems, clean the
corona wires as follows:
a
Turn off the machine's power switch.
Unplug the telephone line cord first, and
then unplug the power cord from the
electrical socket.
b
Press the front cover release button and
then open the front cover.
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c
Hold the green handle of the drum unit.
C
Lift the drum unit up and then pull it out
until it stops.
d
Using their colored handles to lift them
out, remove all four toner cartridges
from the drum unit.