Samsung ML-2250 Series User Manual page 131

Problem
Vertical lines
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Gray background
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Toner smear
Vertical repetitive
defects
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6.16
S
OLVING PROBLEMS
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 E.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 5.5.
• Check the paper type and quality. See "Paper Specifications"
on page E.3.
• Remove the toner cartridge and install a new one. See
"Installing the Toner Cartridge" on page 2.4.
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, print a cleaning sheet several times to
clean the cartridge; see page 5.7. After the printout, if you
still have the same problems, install a new toner cartridge.
See "Installing the Toner Cartridge" on page 2.4.
• 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.
Solution