Samsung ProXpress M458x Series User Manual page 219

Solving other problems
Condition
Dropouts 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 "Print media specifications" on page 249).
• The paper lot is bad. The manufacturing processes can
cause some areas to reject toner. Try a different kind or
brand of paper.
• Change the printer option and try again. Go to Printing
Preferences, click Paper tab, and set type to thick paper
(see "Opening printing preferences" on page 66).
• If these steps do not correct the problem, contact a service
representative.
White Spots If white spots appear on the page:
• The paper is too rough and a lot of dirt from a paper falls to
the inner devices within the machine, so the transfer roller
may be dirty. Clean the inside of your machine. Cleaning
the inside or contact a service representative.
• The paper path may need cleaning. Cleaning the inside or
contact a service representative.
Suggested Solutions Condition
Vertical lines If black vertical streaks appear on the page:
• The drum inside the printer has probably been scratched.
Remove the imaging unit and install a new one. Contact a
service representative.
If white vertical streaks appear on the page:
• The surface of the LSU part inside the machine may be
dirty. Cleaning the inside or contact a service
representative.
If vertical streaks appear on the page:
• The surface of the scanner glass and its white sheet may be
dirty. Cleaning the inside or contact a service
representative.
Color or Black If the amount of background shading becomes unacceptable:
background
• Change the image transfer belt if it has reached its lifespan.
Contact a service representative.
• Check the environmental conditions: very dry conditions
(low humidity) or a high level of humidity (higher than
80% RH) can increase the amount of background shading.
• Remove the old toner cartridge and install a new one.
Suggested Solutions
9. Troubleshooting
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