Brother MFC-9420CN - Manual (Page 147)

Chapter C
C - 22
Cleaning the scanner glass
Lift the document cover. Clean the scanner
glass and white plastic above it with isopropyl
alcohol on a soft lint-free cloth.
In the ADF unit, clean the white plastic bar
and the scanner glass strip under it with
isopropyl alcohol on a lint-free cloth.
Cleaning to prevent paper
jams
When you clean the inside of the machine,
pay attention to the following:
White Plastic
Scanner
glass
Document
Cover
Glass Strip
White
Plastic Bar
WARNING
■
The fusing unit and the parts around it
are hot! Never touch the shaded areas
shown below.
■
Be careful not to inhale the toner.
CAUTION
■ When you clean parts inside the
machine, use a clean, dry soft, lint-free
cloth. Do not use Isopropyl alcohol.
■
If your clothes are smeared with toner,
wipe off the toner with a dry cloth.
Immediately wash your clothes in cold
water to avoid stains.
■
Never touch or clean the transfer roller
because print quality may be adversely
affected.