Samsung ML-2550 User Manual page 143

Problem
Dropouts
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Vertical lines
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Gray background
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Toner smear
7.16
S P
OLVING ROBLEMS
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
"Paper Specifications" on page G.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 page.
• If these steps do not correct the problems, contact a service
representative.
If black vertical streaks appear on the page:
• The drum inside the toner cartridge has probably been
scratched. Install a new toner cartridge.
If the amount of background shading becomes unacceptable,
the procedures below may fix the problem.
• Change to a lighter weight pages. See "Paper Specifications"
on page G.3.
• Check the printer's environment; very dry (low humidity) 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
"Installing the Toner Cartridge" on page 2.4.
• Clean the inside of the printer. See "Cleaning the Inside" on
page 6.7.
• Check the paper type and quality. See "Paper Specifications"
on page G.3.
• Remove the toner cartridge and install a new one. See
"Installing the Toner Cartridge" on page 2.4.
Solution