9.12 <
Troubleshooting>
Vertical lines
If black vertical streaks appear on the page:
• The drum inside the toner cartidge has
probably been scratched. Install a new toner
cartidge.
Gray background
If the amount of background shading becomes
unacceptable, the procedures below may fix the
problem.
• Change to lighter weight pages. See page 5.3.
• Check the printer’s environment; very dry (low
humidity) or high humidity (higher than 80%
RH) conditions can increase the amount of
background shading.
• Remove the old toner cartidge and install a
new one. See page 8.4.
Toner smear
• Clean the inside of the printer. See page 8.1.
• Check the type and quality. See page 5.2.
• Remove the toner cartidge and install a new
one. See page 8.4.
Vertical repetitive
defects
If marks repeatedly appear on the printed side of
the page at even intervals:
• The toner cartidge may be damaged. If a
repetitive mark occurs on the page, print a
cleaning sheet several times to clean the
cartridge; see page 8.2. After the printout, if
you still have the same problems, install a new
toner cartidge. See page 8.4.
• 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.
Condition Suggested solutions
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbC
AaBbC
AaBbC
AaBbC
AaBbC
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
via the printer properties window.
Misformed
characters
• If characters are improperly formed and
producing hollowed images, the paper stock
may be too slick. Try a different paper. See
page 5.3.
• If characters are improperly formed and
producing a wavy effect, the scanner unit may
need service. Verify that it also occurs on a
demo page (see page 2.6). For service,
contact a service representative.
Page skew
• Ensure that the paper is loaded properly.
• Check the paper type and quality. See
page 5.2.
• Ensure that the paper or other material is
loaded correctly and the guides are not too
tight or too loose against the paper stack.
Curl or wave
• Ensure that the paper is loaded properly.
• Check the type and quality. Both high
temperature and humidity can cause paper
curl. See page 5.2.
• Turn over the stack of paper in the tray. Also
try rotating the paper 180° in the tray.
• Try printing to the rear cover (face-up).
Condition Suggested solutions
BbC
AaBbC
AaBbCc
AaBbCc
aBbCc
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