Samsung CLP-775 SERIES - Manual (Page 79)

Troubleshooting_ 79
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 "Print media
specifications" on page 92.)
• 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
Printing Preferences, click Paper tab, and
set type to Thick. (See "Opening printing
preferences" on page 48.)
• If these steps do not correct the problem,
contact a service representative.
White Spots If white spots appear 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 inside" on page 65.).
• The paper path may need cleaning. (See
"Cleaning the inside" on page 65.)
Vertical lines If black vertical streaks appear on the page:
• The surface (drum part) of the toner cartridge
inside the machine has probably been
scratched. Remove the toner cartridge and
install a new one. (See "Replacing the toner
cartridge" on page 84.)
If white vertical streaks appear on the page:
• The surface of the LSU part inside the
machine may be dirty. (See "Cleaning the
inside" on page 65.)
Color or Black
background
If the amount of background shading becomes
unacceptable:
• Change to a lighter weight paper. (See "Print
media specifications" on page 92.)
• 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 toner cartridge and, install a
new one. (See "Replacing the toner cartridge"
on page 84.)
Condition Suggested Solutions
A a B b C
A a B b C
A a B b C
A a B b C
A a B b C
Toner smear If toner smears on the page:
• Clean the inside of the machine. (See
"Cleaning the inside" on page 65.)
• Check the paper type and quality. (See "Print
media specifications" on page 92.)
• Remove the toner cartridge and then, install a
new one. (See "Replacing the toner cartridge"
on page 84.)
Vertical repetitive
defects
If marks repeatedly appear on the printed side of
the page at even intervals:
• The toner cartridge may be damaged. If you
still have the same problem, remove the toner
cartridge and, install a new one. (See
"Replacing the toner cartridge" on page 84.)
• 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 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
in Printing Preferences. (See "Opening
printing preferences" on page 48.)
Toner particles are
around bold
characters or
pictures
The toner might not adhere properly to this type of
paper.
• Change the printer option and try again.
Go to the Printing Preferences, click the
Paper tab, and set the paper type to
Recycled.
Condition Suggested Solutions
A