Troubleshooting procedures – Brother MFC 7550MC User Manual
Page 222
TROUBLESHOOTING PROCEDURES
16-17
MFC 4550/6550MC/7550MC
OP-US-5.0
Printed pages are
blurred
at
the
center
or
at
either
edge.
Certain
environmental
conditions
such
as
humidity,
high
temperatures,
etc.
may
cause
this
condition
to
occur.
• Make
sure
the
machine
is
placed
on
a
flat,
horizontal
surface.
• Remove
the
drum
unit
with
the
toner
cartridge
installed.
Try
rocking
them
from
side
to
side.
• You
may
clear
the
problem
by
wiping
the
scanner
windows
with
a
clean
soft
cloth.
(See
“Regular
Maintenance”
and
“Cleaning
the
Drum
If
the
same
problem
occurs
after
cleaning
and
the
display
shows
CHANGE
DRUM,
replace
the
drum
unit
with
a
new
one.
• Turn
the
density
dial
counterclockwise
for
lighter
images.
See
“The
is
too
Light
or
too
• Make
sure
that
you
use
paper
that
meets
the
spacifications.
Rough
surface
or
thick
media
can
cause
the
problem.
Ghost
images
appear
on
printed
pages.
Blurred Page
Ghost Images
Question
Recommendation
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NOTE
The
drum
unit
is
a
consumable
item,
and
it
is
necessary
to
replace
it
periodically.