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142
CHAPTER SIXTEEN
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
machine’s environment. Conditions such as humidity, high
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
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.
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,
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
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
window.
Printed pages are marked Markings may disappear by themselves. Try copyingat
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
the drum unit with a new one.
Dark Stripes or Toner Stains
White Spots
Scattering Toner
White page
Black Page
Example of Regular Marking
White Stripes or
Faint lmages