Samsung ML-1440 User Manual page 121

Solving Print Quality Problems
Problem
Toner specks
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Dropouts
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Vertical lines
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7.16
P
ROBLEM
• The paper may not meet paper specifications (for example,
If faded areas, generally rounded, occur randomly on the
page:
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If black vertical streaks appear on the page:
If white vertical streaks appear on the page:
S
OLVING
the paper is too moist or too rough). See "Paper
Specifications" on page
• The transfer roller may be dirty. See "Cleaning the Inside"
on page 6.4.
• The paper path may need cleaning. See "Cleaning the
Inside" on page 6.4.
• 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 kind or brand
of paper. See "Paper Specifications" on
• 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 "Repetitive
vertical defects" on
• If these steps do not correct the problems, contact a
service representative.
• The photosensitive drum inside the toner cartridge has
probably been scratched. Install a new toner cartridge.
• The surface of the LSU part inside the printer may be dirty.
Clean the LSU (see page
Solution
A.2.
AaBbCc
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page
page 7.17.
6.5).
A.2.