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150
C H A P T E R S E V E N T E E N
Copy Quality
Difficulties
Print Quality
Difficulties
DIFFICULTY
Vertical streaks appear in
copies.
Printouts are too dark or
light.
Printed pages contain white
stripes.
White Stripes or
Faint lmages
Printed pages are stained
with toner or have vertical
stripes.
Dark Stripes or Toner Stains
Printed pages have white
spots in black text and
you graphic areas.
White Spots
Toner scatters and stains
the printed page.
Scattering Toner
The whole page is printed
black.
Black Page
Nothing is printed on the
page.
White page
SUGGESTIONS
Sometimes you may see vertical streaks on your copies.
Either the scanner or the primary corona wire for printing is
dirty. Clean them both.
Adjust the print conditions by setting the Print Density
function, It has been factory set to the middle position.See
"Setting the Print Density" in chap. 5.
You may fix this by wiping the scanner windows with a 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.
Clean the machine's interior and the primary corona
wire of toner cartridge. See "Regular Maintenance" and
"Cleaning the 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 new one.
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 display shows CHANGE
DRUM SOON, replace the drum unit with a new one.
Adjust the print conditions by setting the Print Density
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. 18. If you still have scattered
toner and the display shows CHANGE DRUM SOON,
replace the drum unit with a new one.
Wipe the electric terminals. Also, do not use heat-
sensitive paper as it will cause this problem. After
cleaning, if the printed pages are still black and the display
shows CHANGE DRUM SOON, replace the drum unit
with a new one.
Make sure that the toner cartridge is not empty. Wipe the
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
window.
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