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Vertical repetitive
defects
If marks repeatedly appear on the printed side of the page at
even intervals:
• The toner cartridge may be damaged. If a repetitive mark
occurs on the page, print a cleaning sheet several times to
clean the cartridge; see "Cleaning the Drum". After the
printout, if you still have the same problems, install a new
toner cartridge. See "Replacing the Toner Cartridge".
• Parts of the printer may have toner on them. If the defects
occur on the back of the page, the problem will likely correct
itself after a few more pages.
• The fusing assembly may be damaged. Contact a service
representative.
Background scatter
Background scatter results from bits of toner distributed on
the printed page.
• The paper may be too damp. Try printing with a different
batch of paper. Do not open packages of paper until
necessary so that the paper does not absorb too much
moisture.
• If background scatter occurs on an envelope, change the
printing layout to avoid printing over areas that have
overlapping seams on the reverse side. Printing on seams
can cause problems.
• If background scatter covers the entire surface area of a
printed page, adjust the print resolution through your
software application or the printer properties.
Misformed characters
• If characters are improperly formed and produce hollow
images, the paper stock may be too slick. Try a different
paper. See "Identifying Print Media Sources and
Specifications".
• If characters are improperly formed and produce a wavy
effect, the scanner unit may need service. For service,
contact a service representative.
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