Brother FAX-8350P, MFC-9650 owner manual You may fix this by wiping the scanner windows with a

142 C H A P T E R S I X T E E N

DIFFICULTY	SUGGESTIONS
Printed pages contain white	You may fix this by wiping the scanner windows with a
stripes.	clean soft cloth. (See “Regular Maintenance” and “Cleaning
	the Drum Unit” in this chapter.) If you still see white stripes
	or faint images and the display shows CHANGE DRUM
	SOON, replace the drum unit with a new one. Check the
White Stripes or	machine’s environment. Conditions such as humidity, high
Faint lmages	temperatures, etc. may cause this print defect to occur.
Printed pages are stained	Clean the machine’s interior and the primary corona wire of
with toner or have vertical	drum unit. See “Regular Maintenance” and “Cleaning the
stripes.	Drum Unit” in this chapter. 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
Dark Stripes or Toner Stains	new one.
Printed pages have white	Make sure that you use paper that meets the specifications.
spots in black text and	Rough surface or thick media can cause the problem. If you
graphic areas.	still see white spots and the display shows CHANGE
	DRUM SOON, replace the drum unit with a new one.
	Check the machine’s environment; conditions such as high
	humidity may cause this situation to occur.
White Spots
Toner scatters and stains	Adjust the print conditions by setting the Print Density
the printed page.	function. Clean the machine’s interior. See “Regular
	Maintenance” and “Cleaning the Drum Unit” in this
	chapter. Make sure that you use paper that meets
	specifications. See chap. 13. If you still have scattered
	toner and the display shows CHANGE DRUM SOON,
Scattering Toner	replace the drum unit with a new one. Check the machine’s
	environment; high temperature and high humidity
	conditions may cause this condition to occur.
The whole page is printed	Clean the machine’s interior and the primary corona wire of
black.	the drum unit. 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
Black Page	damaged.
Nothing is printed on the	Make sure that the toner cartridge is not empty. Wipe the
page.	electric terminals referring to “Regular Maintenance” and
	“Cleaning the Drum Unit” in this chapter. Make sure
	that a torn piece of paper does not remain on the scanner
White page	window.
Printed pages are marked	Markings may disappear by themselves. Try copying at
regular intervals.	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 marked or
	damaged by excessive exposure to light. In this case, replace
Example of Regular Marking	the drum unit with a new one.