- Hewlett-Packard Color LaserJet User Guide

EN Chapter 9 205
Marbled output
Print a configuration page(see page 49), and refer to the color
blocks at the bottom of the page. Replace the toner cartridge of
the color or colors that are marbled.
Random spots
The media does not meet HP media specifications (see page 67).
Use paper that meets HP media specifications.
The printer requires cleaning (see page 148).
If the random spot are one color, replace the toner cartridge for
that color. If the random spots are multiple colors, replace the
drum kit.
Sharkskin
Images with sharkskin have a rough, mottled finish.
Use media that meets HP media specifications (see page 67).
Make sure the humidity and temperature are within specifications
(see page 235
).
Do not use automatic duplex mode. Duplex manually or not at all.
Sunburn
The imaging drum might have been exposed to light. Characteristics
of sunburn are streaked or blurred lines across the length of the page
(side-to-side on portrait, or top-to-bottom on landscape).
Print 50 to 100 pages on the imaging drum to remove the
sunburn.
If sunburn characteristics are still occurring, allow the imaging
drum to sit in a dark place for two to three days.
If sunburn is severe (the characteristics don’t go away), replace
the imaging drum.
CAUTION Do not expose the imaging drum to light for more than 15 seconds. The
drum is light sensitive, and exposure to light can cause permanent
damage.
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