Brother MFC-9800 - Manual (Page 197)

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 21 - 12
Printed pages are marked at
regular intervals.
Example of Regular
Marking
Markings may disappear by themselves. Try copying multiple
pages to clear this problem. Markings may occur if the MFC
has not been used for a long time. A possible cause is that the
surface of the drum is scratched. You must then replace the
drum unit with a new one. If the markings do not disappear, it
may be that the drum was marked or damaged by excessive
exposure to light. In this case, replace the drum unit with a
new one.
Printed pages are blurred at
the center or at either edge.
Blurred Page
Certain environmental conditions such as humidity, high
temperatures, etc. may cause this condition to occur. Make
sure the MFC 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 a blurred page by
wiping the scanner windows with a clean soft cloth. (See
Routine Maintenance and Cleaning the Drum Unit, on pages
21-16 and 21-18.) If a blurred page occurs after cleaning and
the LCD shows
CHANGE DRUM SOON , replace the drum
unit with a new one.
Ghost images appear on
printed pages.
Ghost Images
Adjust the print conditions by changing the Print Density
setting, page 5-4.—OR—
Rough surfaces or thick media can cause a ghost image. Make
sure you select the Paper Type that suits the paper in your
multi-purpose sheet feeder. (See Paper Type, page 11-8 and
11-9 and Media Type, page 14-4.)
The drum unit is a consumable item and it is necessary to replace it periodically.
DIFFICULTY SUGGESTIONS