Solving Print Quality Problems - Samsung ML ML-4050N User Manual

Condition Possible cause
PDF file Incompatibility
does not between the PDF
print file and the
correctly- Acrobat products.
some parts
are missing
in the
graphics,
text or
illustrations.

Solving print quality problems

Dirt inside of the printer or improper paper loading may reduce print
quality. See the table below to troubleshoot problems.
Condition
Light or faded If a vertical white streak or faded area appears
print on the page:
• The toner supply is low. You may be able to
temporarily extend the toner cartridge life. See
page 8.3. If this does not improve 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 5.3.
• If the entire page is light, the print resolution
setting is too light or toner save mode is on.
Adjust the print resolution and toner save
mode in the printer properties. See the
Software section.
• If the entire page is faded with "Toner Low
Replace Toner" message on LCD,
set "CLR Empty Msg." to "On" referring to
page 8.6. In this case, you can keep printing
but the quality cannot be guaranteed, and the
product support is no longer provided.
• A combination of faded or smeared defects
may indicate that the printer needs cleaning.
See page 8.1.
• The surface of LSU may be dirty. Clean the
LSU. See page 8.2.
Toner spots • The paper may not meet specifications (for
example, the paper is too moist or too rough).
See page 5.3.
• The transfer roller or paper path may be dirty.
See page 8.1.
Suggested solutions
Printing the PDF file as an
image may enable the file to
print. Turn on Print As Image
from the Acrobat printing
options.
Note:
It will take longer to print
when you print a PDF file as an
image.
Suggested solutions
Condition
Dropouts If generally rounded, faded areas occur
randomly on the page:
• A single sheet of paper may be defective. Try
• The moisture content of the paper is uneven
• The paper lot is bad. The manufacturing
• The toner cartridge may be defective. See
• If these steps do not correct the problems,
Vertical lines If black vertical streaks appear on the page:
• The drum inside the toner cartridge has
If white vertical streaks appear on the page:
• The surface of the LSU part inside the printer
Gray If the amount of background shading becomes
background unacceptable, the procedures below may fix the
problem.
• Change to lighter weight pages. See page 5.3.
• Check the printer's environment; very dry (low
• Remove the old toner cartridge and install a
Toner smear • Clean the inside of the printer. See page 8.1.
• Check the type and quality. See page 5.2.
• Remove the toner cartridge and install a new
9.11
<Troubleshooting>
Suggested solutions
reprinting the job.
or the paper has moist spots on its surface.
Try a different brand of paper. See page 5.3.
processes can cause some areas to reject
toner. Try a different kind or brand of paper.
"Vertical repetitive defects" on the next page.
contact a service representative.
probably been scratched. Install a new toner
cartridge. See page 8.4.
may be dirty. Clean the LSU. See page 8.2.
humidity) or high humidity (higher than 80%
RH) conditions can increase the amount of
background shading.
new one. See page 8.4.
one. See page 8.4.