Brother MFC-9160 Owner's Manual page 73

DIFFICULTY
Copy Quality Difficulties
Vertical streaks appear in
copies.
Print Quality Difficulties
Printed pages are curled.
Printed pages are smeared.
Printouts are too dark or light. Adjust the print conditions by setting the Print Density function, it
Printed pages contain white
stripes.
White Stripes or Faint Images
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
Sometimes you may see vertical streaks on your copies. Either the
scanner or the primary corona wire for printing is dirty. Clean them
both.
2
Thin Paper (64-69 g/m
select the Paper Type that suits the paper in your multi-purpose
sheet feeder. (See Paper Type, page 20 and Media Type, page 27.)
Rough surfaces or thick media can cause "smeared pages"—OR—
"the toner to smear". Make sure you select the correct Paper Type
that suits the paper in your multi-purpose sheet feeder. (See Paper
Type, page 20 and Media Type, page 27.)
has been factory set to the middle position. (See Setting the Print
Density, page 11.)
You may fix this by wiping the scanner windows with a clean soft
cloth. (See Regular Maintenance, page 71 and Cleaning the Drum
Unit, page 73.) 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 machine's interior and the primary corona wire of drum
unit. (See Regular Maintenance, page 71 and Cleaning the Drum
Unit, page 73.) 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. (See
Acceptable Paper, page 24.) 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.
(See Setting the Print Density, page 11.) Clean the machine's
interior. (See Regular Maintenance, page 71 and Cleaning the
Drum Unit, page 73.) Make sure that you use paper that meets
specifications. (See Acceptable Paper, page 24.) If you still have
scattered toner and the display shows CHANGE DRUM SOON,
replace the drum unit with a new one.
SUGGESTIONS
) can cause this problem. Make sure you
Troubleshooting and Maintenance
67