146 Chapter 9 Image quality
EN
• Toner collected on the transfer roller can cause smudging on the
back of the page. Smudges commonly appear on the edges of
pages after media size is changed. The roller is self-cleaning and
the smudging will normally clear within a few pages.
• Toner on the edge of the media is usually caused by toner collecting
on the paper guides. Inspect the paper guides and clean with a lint-
free cloth if necessary.
• Do not re-feed paper that has already been through the printer.
Re-feeding paper that has already passed through the printer can
contaminate the fuser causing stray toner defects.
• Paper may have blobs after warm-up; print a few pages to resolve
the anomaly.
• The toner density setting is wrong.
• The toner cartridge is low.
• The transfer roller is defective.
• The paper does not meet HP paper specifications or is stored
improperly.
• The laser scanner is defective.
• The high-voltage power supply is defective.
• Dirt is in the printer.
• The toner cartridge is defective.
• Paper is too smooth.
• The fuser setting for the paper type is wrong.
• The fuser is defective.
Irregular, raised spots or stray toner
Light print, dark print, faded print
Loose toner
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