Cleaning The Laser Scanner Window - Brother MFC-7420 User Manual

Cleaning the laser scanner
window
CAUTION
■
Do not use isopropyl alcohol to clean
the laser scanner window.
■
Do not touch the laser scanner window
with your fingers.
1
Before you clean the inside of the
machine, turn off the machine's power
switch.
Unplug the telephone line cord first, and
then unplug the power cord from the
electrical socket.
2
Open the front cover and pull out the
drum unit and toner cartridge assembly.
WARNING
Just after you have used the machine,
some internal parts of the machine are
extremely HOT! When you open the front
cover of the machine, never touch the
shaded parts shown in the diagram below.
Troubleshooting and routine maintenance
CAUTION
To prevent damage to the machine from
static electricity, do not touch the
electrodes shown below.
3
Gently clean the laser scanner window
by wiping it with a clean soft dry lint-free
cloth. Do not use isopropyl alcohol.
Laser Scanner
Window
11
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