Brother MFC-9440CN - Manual (Page 159)

Troubleshooting and routine maintenance
143
C
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 non-flammable glass
cleaner, 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
windows
C
CAUTION
DO NOT use isopropyl alcohol to clean the
laser scanner windows.
DO NOT touch the laser scanner windows
with your fingers.
a
Turn off the machine’s power switch.
Unplug the telephone line cord first,
disconnect all cables, and then unplug
the power cord from the AC power
outlet.
b
Press the front cover release button and
then open the front cover.