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Xerox DP 820 User’s Guide 31
Maintenance
Problem: The image is flickering or otherwise unstable
Try one of these possible solutions:
• Change the Phase setting on the OSD Display menu. See
“Display Menu” on page 23.
• Change the number of colors that your computer displays on its
monitor. See the documentation that you received with your
computer for the steps to change the number of colors its
monitor can display.
Problem: Image has vertical flickering stripes.
Try one of these possible solutions:
• Change the Tracking setting on the OSD Display menu. See
“Display Menu” on page 23.
• Reset the display mode of your computer’s graphic card to
make it compatible with the projector. See “Preset Signals” on
page 34 for the settings.
Problem: Image is out of focus.
Try one of these possible solutions:
• Adjust the focus ring on the projector. Turn the focus ring until
the image comes into focus.
• Make sure the distance between the projector and the screen is
between 1.2m and 10.0m. See “Adjusting Projection Image
Size” on page 15 for details.
Problem: When the projector is connected to a DVD
player, playing a film with a 16:9 aspect ratio makes the
image looks stretched out.
Try one of these possible solutions:
• Reset your DVD player to display at a 4:3 aspect ratio. See the
DVD player user’s guide for the steps to adjust its aspect ratio.
• Using the OSD Menus, go to the Image Menu and select a new
Aspect Ratio. Change it to 4:3.
Problem: The colors of the projected image look different
than the colors of the image on the computer screen.
Use the OSD Image and Video menus to adjust the colors.