Brother MFC-9700 - Manual (Page 192)

21 - 11 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
Printed pages are stained
corona with toner or have
vertical stripes.
Dark Stripes or Toner
Stains
Clean the MFC’s interior and the primary wire of the drum
unit. (See
Routine Maintenance and Cleaning the Drum
Unit , on pages 21-16 and 21-18.) 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 LCD shows
CHANGE DRUM SOON , replace the drum
unit with a new one.
Printed pages have white
spots in black text and
graphic areas.
White Spots
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 LCD shows
CHANGE DRUM
SOON , replace the drum unit with a new one. Check the
MFC’s environment; conditions such as high humidity may
cause this situation to occur.
Toner scatters and stains the
printed page.
Scattering Toner
Adjust the print conditions in the Print Density setting.
Remove the drum unit and clean the MFC’s interior. (See
Routine Maintenance and Cleaning the Drum Unit , on
pages 21-16 and 21-18.) Make sure that you use paper that
meets specifications. (See page 2-5.) If you still have scattered
toner and the LCD shows
CHANGE DRUM SOON , replace
the drum unit with a new one. Check the MFC’s environment;
high temperature and high humidity may cause this condition
to occur.
The whole page is printed
black.
Black Page
Clean the MFC’s interior and the primary corona wire of the
drum unit. (See page 21-18.) Also, do not use heat sensitive
paper as it will cause this problem. After cleaning, if the
printed pages are still black or the LCD shows
CHANGE
DRUM SOON , replace the drum unit with a new one. The
drum unit may be damaged.
DIFFICULTY SUGGESTIONS