Brother MFC 8700 - Manual (Page 147)

17 - 13 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
Print
Quality
Difficulties
(Cont.)
Difficulty Suggestions
The whole page is Clean the machine’s interior and the primary
printed black. corona wire of the drum unit. (See pages
17-21~22.) Also, do not use heat-sensitive paper
as it will cause this problem. After cleaning, if
the printed pages are still black or the display
shows CHANGE DRUM SOON, replace the
drum unit with a new one. The drum unit may be
damaged.
Nothing is printed on Make sure that the toner cartridge is not empty.
the page. Wipe electric terminals referring to Routine
Maintenance, Cleaning the Printer and
Cleaning the Drum Unit, on pages 17-21 and
17-22. Make sure that a torn piece of paper
does not remain on the scanner window.
Printed pages are Markings may disappear by themselves. Try
marked at regular copying multiple pages to clear this problem.
intervals. 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 Certain environmental conditions such as
blurred at the center humidity, high temperatures, etc. may cause
or at either edge. 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 17-21
and 17-22.) 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 Adjust the print conditions by setting the Print
on printed page. 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.
Black Page
White Page
Example of Regular
Marking
,,,,,, ,,,,,, ,,,,,, ,,,,,, ,,,,,, ,,,,,,
,,,,,, ,,,,,, ,,,,,, ,,,,,, ,,,,,, ,,,,,, ,,,,,,
Ghost Images
Blurred Page
The drum unit is a consumable item and it is necessary to replace it
periodically.