Brother MFC-8500 - Manual (Page 205)

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 22 - 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 machine 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 machine 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, Cleaning
the Printer and Cleaning the Drum Unit, on Pages 22-16
and 22-17.) If a blurred page occurs after cleaning and
the display shows
CHANGE DRUM SOON , replace the
drum unit with a new one.
Ghost images appear on
printed page.
Ghost Images
Adjust the print conditions by setting the Print Density
function. Make sure that you use paper that meets the
specifications. Rough surfaces or thick media can cause
a ghost image. Make sure that you select the appropriate
media type in the printer driver.
The drum unit is a consumable item and it is necessary to replace it periodically.
Difficulty Suggestions