7.11 <
Troubleshooting>
Vertical repetitive
defects
If marks repeatedly appear on the printed side
of the page at even intervals:
• Clean the inside of the machine. Contact a
service representative to clean the inside of
the machine. After cleaning the inside of the
machine, if you still have the same
problems, install a new toner cartridge of the
problem color. See "Replacing the toner
cartridge" on page 6.5.
• Parts of the machine 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
randomly 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 covers the entire
surface area of a printed page, adjust the
print resolution through your software
application or in printer properties.
Misformed
characters
• If characters are improperly formed and
producing hollow images, the paper stock
may be too slick. Try different paper. (See
"Specifications on print media" on page 4.3.)
• If characters are improperly formed and
producing a wavy effect, the scanner unit
may need service. Contact a service
representative.
Page skew
• Ensure that the paper is loaded properly.
• Check the paper type and quality. (See
"Specifications on print media" on page 4.3.)
• Ensure that the paper or other material is
loaded correctly and the guides are not too
tight or too loose against the paper stack.
Condition Suggested solutions
Curl or wave
• Ensure that the paper is loaded properly.
• Check the paper type and quality. Both high
temperature and humidity can cause paper
curl. (See "Specifications on print media" on
page 4.3.)
• Turn the stack of paper over in the tray. Also
try rotating the paper 180° in the tray.
Wrinkles or creases
• Ensure that the paper is loaded properly.
• Check the paper type and quality. (See
"Specifications on print media" on page 4.3.)
• Turn the stack of paper over in the tray. Also
try rotating the paper 180° in the tray.
Back of printouts
are dirty
Check for leaking toner. Clean the inside of
the machine. Contact a service
representative.
Black pages
• The toner cartridge may not be installed
properly. Remove the cartridge and reinsert
it.
• The toner cartridge may be defective and
need replacing. Remove the toner cartridge
and install a new one. (See "Replacing the
toner cartridge" on page 6.5.)
• The machine may require repair. Contact a
service representative.
Condition Suggested solutions
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