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Troubleshooting>
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. See
page 12.4. If this does not improve the print
quality, install a new toner cartridge.
• The paper may not meet paper specifications;
for example, the paper is too moist or too
rough. See page 5.7.
• 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 page 2.3, respectively.
• A combination of faded or smeared defects
may indicate that the toner cartridge needs
cleaning. See page 12.5.
• The surface of the LSU part inside the
machine may be dirty. Clean the LSU. See
page 12.2.
Toner specks
• The paper may not meet specifications; for
example, the paper is too moist or too rough.
See page 5.7.
• The transfer roller may be dirty. Clean the
inside of your machine. See page 12.2.
• The paper path may need cleaning. See page
12.2.
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 page 5.7.
• The paper lot is bad. The manufacturing
processes can cause some areas to reject
toner. Try a different kind or brand of paper.
• If these steps do not correct the problem,
contact a service representative.
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Vertical lines
If black vertical streaks appear on the page:
• The drum inside the toner cartridge has
probably been scratched. Remove the toner
cartridge and install a new one. See
page 12.4.
If white vertical streaks appear on the page:
• The surface of the LSU part inside the
machine may be dirty. Clean the LSU. See
page 12.2.
Gray background
If the amount of background shading becomes
unacceptable:
• Change to a lighter weight paper. See
page 5.7.
• Check the machine’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 cartridge and install a
new one. See page 12.4.
Toner smear
• Clean the inside of the machine. See
page 12.2.
• Check the paper type and quality. See
page 5.7.
• Remove the toner cartridge and install a new
one. See page 12.4.
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 page 12.5. After the printout, if
you still have the same problems, remove the
toner cartridge and install a new one. See
page 12.4.
• 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.
Condition Suggested solutions