REPLACING TONER CARTRIDGE AND DRUM UNIT
13-5
MFC 4550/6550MC/7550MC
OP-US-5.0
Maintenance
Replacing
the
Drum
Unit
The
machine
uses
a
drum
unit
to
create
the
images
on
paper.
If
the
display
shows
CHANGE
DRUM,
it
indicates
the
drum
unit
is
nearly
at
the
end
of
its
life.
We
recommend
you
prepare
a
new
drum
unit
to
replace
the
current
one.
Even
if
the
display
shows
CHANGE
DRUM,
you
may
be
able
to
continue
to
without
replacing
the
drum
unit
for
a
while.
If
there
is
a
noticeable
deterioration
in
the
output
quality
even
before
CHANGE
DRUM
is
shown,
then
the
drum
unit
should
be
replaced.
WARNING
• When
removing
the
drum
unit,
handle
carefully
because
it
contains
toner.
• You
should
clean
the
machine
when
you
replace
the
drum
unit.
See
page
3) Remove
the
old
drum
unit.
(See
WARNING
Just
after
you
have
used
the
machine,
some
internal
parts
of
the
machine
are
extremely
HOT!
So
please
be
careful.
(See
page
3)
Drum unit
Top cover
Follow these steps to replace the drum unit:
1) Turn off the power switch or unplug the power cord.
2) Open the top cover.
NOTE: The
drum
unit
is
a
consumable,
and
it
is
necessary
to
replace
it
periodically.
The drum unit is rated at approximately 20,000 pages. There are many
factors
that
determine
the
actual
drum
life,
such
as
temperature,
humidity,
type of paper and toner that you use and the number of pages per print job,
etc...
The
drum
life
is
estimated
at
approximately
20,000
pages
at
20
page
per
job and 8,000 pages at 1 page per job. The actual number of pages your drum
will
may
be
significantly
less
than
these
estimates.
Because
we
have
no
control
over
the
many
factors
that
determine
the
actual
drum
life,
we
can
not
guarantee a minimum number of pages that will be printed by your drum.
For
best
performance,
use
only
genuine
toner,
and
the
product
should
be
used
only
in
a
clean,
dust-free
environment
with
adequate
ventilation.