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