Brother International MFC-4300 Users Manual - English - Page 135

White Stripes or, Faint lmages, Dark Stripes or, Toner Stains, White Spots, Scattering Toner

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DIFFICULTY SUGGESTIONS Copy Quality Difficulties Vertical streaks appear in copies. Sometimes you may see vertical streaks on your copies. Either the scanner or the primary corona wire for printing is dirty. Clean them both. (See pages 15-23 to 15-25) Print Quality Difficulties Printouts are too dark or Adjust the print conditions by setting the Print Density too light. light function. It has been factory set to the middle position. (See Setting the Print Density, page 5-5.) Printed pages contain white stripes. White Stripes or Faint lmages You may fix this by wiping the scanner windows with a clean soft cloth. (See Cleaning the Document Scanner, page 15-23 and Replacing the Drum Unit, page 15-30.) If you still see white stripes or faint images and the display shows CHANGE DRUM SOON, replace the drum unit with a new one. Printed pages are stained with toner or have vertical stripes. Dark Stripes or Toner Stains Clean the MFC's interior and the primary corona wire of the toner cartridge. (See Routine Maintenance, page 15-23 and Cleaning the Drum Unit, page 15-25.) 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. Printed pages have white in black text and graphic areas. Make sure that you use paper that meets the specifications. spots 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. White Spots Toner scatters and stains the printed page. Scattering Toner Adjust the print conditions by setting the Print Density function. Remove the drum unit and clean the MFC's interior. (See Routine Maintenance, page 1523, Cleaning the Printer, page 15-24 and Cleaning the Drum Unit, page 15-25.) Make sure that you use paper that meets specifications. (See pages 2-7.) If you still have scattered toner and the display shows CHANGE DRUM SOON, replace the drum unit with a new one. T R O U B L E S H O O T I N G A N D R O U T I N E M A I N T E N A N C E 15 - 15

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TROUBLESHOOTING AND ROUTINE MAINTENANCE
15 - 15
DIFFICULTY
SUGGESTIONS
Copy Quality Difficulties
Vertical streaks appear
in copies.
Sometimes you may see vertical streaks on your
copies. Either the scanner or the primary corona
wire for printing is dirty. Clean them both.
(See pages 15-23 to 15-25)
Print Quality Difficulties
Printouts are too dark or
too light.
Adjust the print conditions by setting the Print Density
light function. It has been factory set to the middle
position. (See
Setting the Print Density
, page 5-5.)
Printed pages contain
white stripes.
White Stripes or
Faint lmages
You may fix this by wiping the scanner windows
with a clean soft cloth. (See
Cleaning the Document
Scanner
, page 15-23 and
Replacing the Drum Unit
,
page 15-30.)
If you still see white stripes or faint
images and the display shows CHANGE DRUM
SOON, replace the drum unit with a new one.
Printed pages are
stained with toner or
have vertical
stripes.
Dark Stripes or
Toner Stains
Clean the MFC’s interior and the primary corona
wire of the toner cartridge. (See
Routine
Maintenance
, page 15-23 and
Cleaning the Drum
Unit
, page 15-25.)
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.
Printed pages have
white in black text and
graphic areas.
White Spots
Make sure that you use paper that meets the
specifications. spots 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.
Toner scatters and stains
the printed page.
Scattering Toner
Adjust the print conditions by setting the Print
Density function. Remove the drum unit and clean the
MFC’s interior. (See
Routine Maintenance
, page 15-
23,
Cleaning the Printer
, page 15-24 and
Cleaning the
Drum Unit
, page 15-25.) Make sure that you use paper
that meets specifications. (See pages 2-7.) If you still
have scattered toner and the display shows CHANGE
DRUM SOON, replace the drum unit with a new one.