Brother MFC-6650MC Owner's Manual page 218

204
C H A P T E R N I N E T E E N
Copy Quality
Difficulties
Print Quality
Difficulties
DIFFICULTY
Vertical streaks appear in
copies
Printouts are too dark or
light
Printed pages contain white You may fix this by wiping the scanner windows with a
stripes
White Stripes or
Faint lmages
Printed pages are stained
with toner or have
vertical stripes
Dark Stripes or Toner Stains
Printed pages have white
spots in black text and
graphic areas
White Spots
Toner scatters and stains
the printed page
Scattering Toner
The whole page is printed
black
Black Page
Nothing is printed on the
the page
White Page
SUGGESTIONS
Sometimes you may see vertical streaks on your copies.
Either the scanner or the primary corona wire for
printing s dirty. Clean them both. (See pages 213 and
215.)
Adjust the print conditions by setting the Print Density
function. It has been factory set to the middle position.
(See "Setting the Print Density"on page 46.)
clean soft cloth. (See "Regular Maintenance" and
"Cleaning the Drum Unit" on pages 213 and 215.) If
you still see white stripes or faint images and the
display shows CHANGE DRUM SOON, replace the
drum unit with a new one.
Clean the MFC's interior and the primary corona wire
of the toner cartridge. (See "Regular Maintenance" and
"Cleaning the Drum Unit" on pages 214 and 215.)
Make sure that the tab of the corona wire is at the home
position. If after cleaning, you still see dark stripes or
toner stains and the display shows CHANGE DRUM
SOON, replace the drum unit with a new one.
Make sure that you use paper that meets the
specifications. Rough surface or thick media can cause
the problem. If you still see white spots and the
display shows CHANGE DRUM SOON,
replace the drum unit with a new one.
Adjust the print conditions by setting the Print Density
function. Remove the drum unit and clean the MFC's
interior. (See "Regular Maintenance", "Cleaning the
Printer" and "Cleaning the Drum Unit" on pages 213
and 215.) Make sure that you use paper that meets
specifications. (See page 18.) If you still have scattered
toner and the display shows CHANGE DRUM SOON,
replace the drum unit with a new one.
Wipe the electric terminals referring to page 214. Also,
do not use heat-sensitive paper as it will cause this
problem. After cleaning, if the printed pages are still
black and the display shows CHANGE DRUM SOON,
replace the drum unit with a new one.
Make sure that the toner cartridge is not empty. Wipe
electric terminals referring to "Regular Maintenance",
"Cleaning the Printer" and "Cleaning the Drum Unit"
on pages 213 and 215. Make sure that a torn piece of
paper does not remain on the scanner window.