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Troubleshooting_ 114
Printing quality problems
If the inside of the machine is dirty or paper has been loaded improperly,
you may notice a reduction in print quality. See the table below to clear the
problem.
CONDITION SUGGESTED SOLUTIONS
Light or faded print
If a vertical white streak or faded area appears
on the page:
• The toner supply is low. You may be able
to temporarily extend the toner cartridge
life. If this does not improve the print
quality, install a new toner cartridge.
• The paper may not meet paper
specifications; for example, the paper may
be too moist or rough. (See "Specification
on print media" on page 35.)
• If the entire page is light, the print
resolution setting is too low or the toner
save mode is on. Adjust the print resolution
and turn the toner save mode off. See the
help screen of the printer driver and refer to
Software section, respectively.
• A combination of faded or smeared defects
may indicate that the toner cartridge needs
cleaning. Contact a service representative.
• The surface of the LSU part inside the
machine may be dirty. Clean the LSU,
contact a service representative.
Toner specks
• The paper may not meet specifications; for
example, the paper may be too moist or
rough. (See "Specification on print
media" on page 35.)
• The transfer roller may be dirty. Clean the
inside of your machine. Contact a service
representative.
• The paper path may need cleaning. Contact
a service representative.
Dropouts
If faded areas, generally rounded, occur
randomly on the page:
• A single sheet of paper may be defective.
Try reprinting the job.
• The moisture content of the paper is
uneven or the paper has moist spots on its
surface. Try a different brand of paper.
(See "Specification on print media" on
page 35.)
• The paper lot is bad. The manufacturing
processes can cause some areas to reject
toner. Try a different kind or brand of
paper.
• Change the printer option and try again. Go
to printer properties, click Paper tab, and
set type to Thick Paper. Refer to the
Software section for details.
• If these steps do not correct the problem,
contact a service representative.
White Spots White spots appears on the page:
• The paper is too rough and a lot of dirt from
a paper falls to the inner devices within the
machine, so the transfer roller may be dirty.
Clean the inside of your machine. (See
"Cleaning the transfer unit" on page 95.)
Contact a service representative.
• The paper path may need cleaning.
Contact a service representative.
Vertical lines
If black vertical streaks appear on the page:
• The surface(drum part) of the imaging unit
inside the machine has probably been
scratched. Remove the imaging unit and
install a new one. (See "Replacing the
imaging unit" on page 97.)
If white vertical streaks appear on the page:
• The surface of the LSU part inside the
machine may be dirty. Clean the LSU.
Contact a service representative.
Color or Black
background
If the amount of background shading becomes
unacceptable:
• Change to a lighter weight paper. (See
"Specification on print media" on page 35.)
• Check the environmental conditions: very
dry conditions (low humidity) or a high level
of humidity (higher than 80% RH) can
increase the amount of background
shading.
• Remove the old imaging unit and then,
install a new one. (See "Replacing the
imaging unit" on page 97.)
Toner smear
• Clean the inside of the machine. Contact a
service representative.
• Check the paper type and quality. (See
"Specification on print media" on page 35.)
• Remove the imaging unit and then, install a
new one. (See "Replacing the imaging
unit" on page 97.)
CONDITION SUGGESTED SOLUTIONS