Cleaning the laser scanner window – Brother MFC 7840W User Manual

Page 134

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120

d

Plug the machine’s power cord back into
the AC power outlet first, and reconnect
all cables and telephone line cord. Turn
on the machine’s power switch.

Note

In addition to cleaning the scanner glass
and glass strip with a soft lint-free cloth
moistened with water, run your finger tip
over the glass to see if you can feel
anything on it. If you feel dirt or debris,
clean the glass again concentrating on
that area. You may need to repeat the
cleaning process three or four times. To
test, make a copy after each cleaning.

Cleaning the laser scanner
window

B

WARNING

DO NOT use isopropyl alcohol to clean the
laser scanner window.

CAUTION

DO NOT touch the laser scanner window
with your fingers.

a

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 AC
power outlet.

b

Open the front cover and slowly take out
the drum unit and toner cartridge
assembly.

WARNING

HOT SURFACE

After you have just used the machine, some
internal parts of the machine will be
extremely hot. When you open the front or
back cover (back output tray) of the
machine, DO NOT touch the shaded parts
shown in the illustration. If you do this, you
may get burned.

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