HP 8000 s manual Color Printing Problems, Sensor as described in Cleaning the Density Sensor

Color Printing Problems

Problem	Cause and Solution
Printed colors do not	The computer and printer use different color processing
match the screen colors	methods. Other factors, such as print media and
	lighting, also influence and limit your ability to match
	colors from the screen to your output. For more
	information on printer driver color controls, see
	chapter 5, “Using Color.”
	Turn the printer off and on to reset the printer's color
	calibration. If the problem persists, clean the density
	sensor as described in “Cleaning the Density Sensor”
	later in this chapter.
	Extremely light screen colors are not being printed.
	Avoid extremely light colors. Your application is
	interpreting extremely light colors as white. For more
	information, see the online help for your application.
	Extremely dark screen colors are being printed as
	black. Avoid extremely dark colors. Your application is
	interpreting extremely dark colors as black. For more
	information, see the online help for your application.
	The screen colors differ from the printer output. Select
	ColorSmart II in the Color tab of the printer driver. For
	information on using the Color Swatch utility to help
	match colors or another color matching system, see
	“Selecting Colors” in chapter 5 or see the online help.
	Each application processes colors differently. Change
	applications. For more information on how a particular
	application handles color, see the documentation for
	the application.
	The color density and balance are not set properly. For
	information on changing the color density and balance,
	see “Adjusting the Color Balance” in chapter 5.
Missing colors	Turn the printer off and on to reset the printer's color
	calibration.
	The media does not meet the specifications for this
	printer. For media specifications, see “Supported Media
	Weights and Sizes for Input Trays” in chapter 3.

EN Color Printing Problems 185