Cleaning the Drum Unit; Shaded parts are ; MFC 4550/6550MC/7550MC- Page 191

REGULAR MAINTENANCE

14-2

MFC 4550/6550MC/7550MC
OP-US-5.0

Maintenance

WARNING

• Do 

not 

use 

isopropyl 

alcohol 

to 

clean 

the 

scanner 

window 

or 

the 

toner

sensor.

• Do 

not 

touch 

the 

scanner 

window 

with 

your 

finger.

• Handle 

the 

drum 

unit 

carefully 

as 

it 

contains 

toner. 

If 

toner 

scatters 

and

your 

hands 

or 

cloths 

get 

dirty, 

immediately 

wipe 

or 

wash 

it 

off 

with 

cold

water 

.

WARNING

Just after you have used the

machine, some internal parts of the
machine are extremely Hot! When
you open the top cover of the

machine, never touch the shaded
parts shown in the diagram to the
left.

Cleaning the Drum Unit

NOTE: We recommend you place the drum unit on a drop cloth or large piece of

disposable paper to avoid spilling and scattering the toner.

1. Turn the drum unit upside down carefully.

▲

 Inside the machine

Shaded parts are 

HOT!

Toner sensor

Electric terminal

Gears

Gears

Scanner window