MAINTENANCE
VistaGRAPHX 2500 User's Manual
4-10
The display is jittery or unstable...
1. If the display is jittery or if it disappears and reappears erratically, check that
the source is properly connected and that its signal is of adequate quality for
detection. For example, the projector scans the default input
for a
signal to display. If a poor quality or improperly connected source is
connected, the projector will briefly and repeatedly attempt to display an
image. If no source is connected, the "No signal present" error message
appears over a blank display. Correct the source connection.
2. The horizontal or vertical scan frequency of the input signal may be out of
range of the projector. Refer to Section 5, Specifications for scan frequency
ranges.
3. Sync signal may be inadequate. Correct the source problem.
4. The input signal type may conflict with the input module. Install the correct
module to match that of the source.
5. Pixel tracking and phase may need adjustment.
The display is faint...
1. Brightness and/or contrast may be set too low. Increase the brightness and/or
contrast settings.
2. The projection room may be too bright. Lower the intensity of projection
room lighting and reduce light reflections as much as possible.
3. The projector may be too far from the screen. Move the projector closer.
4. The location of the audience with respect to the screen may not be ideal.
Make sure the audience is within the viewing angle set by the projector and
screen position, and the screen type.
5. The source may be double terminated. Ensure the source is terminated only
once.
6. The source (if non-video) may need sync tip clamping. Enter a check in the
"Sync Tip Clamping" box found in the Image Settings menu.
The display is reversed or upside down...
1. The projector's image orientation is not set correctly for the current
installation. Refer to 2.6, Operating Orientation, to set the projector's image
orientation to match your installation.
The upper portion of the display is waving, tearing or jittering...
1. This sometimes occurs when the source is a VCR or video signal. If you are
using a VCR, enter a checkmark in the "VCR" checkbox within the Image
Settings menu.
Portions of the display are cut off or wrap to the opposite edge...
1. Reduce top, bottom, left or right blanking from within the Size / Position
menu.
2. Horizontal/vertical placement may need adjustment. Adjust until entire
image is visible and centered.
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Содержание VistaGRAPHX 2500
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