Printing Quality Problems - Samsung SCX-812x Series User Manual

Printing quality problems

If the inside of the machine is dirty or paper has been loaded improperly,
there might be a reduction in print quality. see the table below to clear the
problem.
Condition
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 color tone might not be adjusted. Adjust
the color tone.
• The paper may not meet paper specifications;
for example, the paper may be too moist or
rough (see "Print media specifications" on
page 165).
• 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.
• 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 "Print media specifications" on
page 165).
• 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.
• Check the location of the machine. If the area
is not well-ventilated, this problem may occur.
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 165).
• 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 paper (see "Opening
printing preferences" on page 101).
• If these steps do not correct the problem,
contact a service representative.
Suggested Solutions
Troubleshooting_ 153
Condition
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. Cleaning
the inside or contact a service
representative.
• The paper path may need cleaning. Cleaning
the inside or contact a service
representative.
Vertical lines If black vertical streaks appear on the page:
• The drum inside the printer has probably
been scratched. Remove the imaging unit
and install a new one. Contact a service
representative.
If white vertical streaks appear on the page:
• The surface of the LSU part inside the
machine may be dirty. Cleaning the inside or
contact a service representative.
If vertical streaks appear on the page:
• The surface of the scanner glass and its
white sheet may be dirty. Cleaning the inside
or contact a service representative.
Color or Black If the amount of background shading becomes
background unacceptable:
• Change the image transfer belt if it has
reached its lifespan. Contact a service
representative.
• 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.
Toner smear If toner smears on the page:
• Clean the inside of the machine. Cleaning
the inside or contact a service
representative.
• Check the paper type and quality (see "Print
media specifications" on page 165).
• Remove the imaging unit and install a new
one. Contact a service representative.
• Change the image transfer belt if it has
reached its lifespan. Contact a service
representative.
Suggested Solutions