Samsung ML-2570 Series - Manual (Page 39)

9.7
<Troubleshooting>
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 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 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.
• 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.
Dropouts If generally rounded, faded areas 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 5.3.
• The paper lot is bad. The manufacturing
processes can cause some areas to reject
toner. Try a different kind or brand of paper.
• The toner cartridge may be defective. See
“Vertical repetitive defects” on the next
column.
• If these steps do not correct the problems,
contact a service representative.
Vertical lines If black vertical streaks appear on the page:
• The drum inside the toner cartridge has
probably been scratched. Install a new toner
cartridge. See page 8.4.
If white vertical streaks appear on the page:
• The surface of the LSU part inside the printer
may be dirty. Clean the LSU. See page 8.2.
Gray
background If the amount of background shading becomes
unacceptable, the procedures below may fix the
problem.
• Change to lighter weight pages. See page 5.3.
• Check the printer’s environment; low humidity
(lower than 20% RH) 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 8.4.
Toner smear • Clean the inside of the printer. See page 8.1.
• Check the paper type and quality. See page
5.2.
• Remove the toner cartridge and install a new
one. See page 8.4.
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, install a
new toner cartridge. See page 8.4.
• Parts of the printer 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