Brother International MFC 7440N Users Manual - English - Page 137

Cleaning the drum unit

Page 137 highlights

g Plug the machine's power cord back into the AC power outlet first, and then reconnect all cables and telephone line cord. Turn on the machine's power switch. CAUTION To avoid print quality problems, DO NOT touch the shaded parts shown in the illustrations below. Troubleshooting and routine maintenance Cleaning the drum unit B If you have print quality problems, clean the drum unit as follows. a Turn off the machine's power switch. Unplug the telephone line cord first, and then unplug the power cord from the AC power outlet. b Open the front cover. c Slowly take out the drum unit and toner cartridge assembly. CAUTION We recommend that you put the drum unit and toner cartridge assembly on a clean, flat surface with a sheet of disposable paper or cloth underneath it in case you accidentally spill or scatter toner. B 123

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Troubleshooting and routine maintenance
123
B
g
Plug the machine’s power cord back into
the AC power outlet first, and then
reconnect all cables and telephone line
cord. Turn on the machine’s power
switch.
CAUTION
To avoid print quality problems, DO NOT
touch the shaded parts shown in the
illustrations below.
Cleaning the drum unit
B
If you have print quality problems, clean the
drum unit as follows.
a
Turn off the machine’s power switch.
Unplug the telephone line cord first, and
then unplug the power cord from the AC
power outlet.
b
Open the front cover.
c
Slowly take out the drum unit and toner
cartridge assembly.
CAUTION
We recommend that you put the drum unit
and toner cartridge assembly on a clean,
flat surface with a sheet of disposable
paper or cloth underneath it in case you
accidentally spill or scatter toner.