Marquee 8521 Ultra Green (HUD) User's Manual
4-6
Maintenance
Symptom:
The display appears to be folded.
Cause/Remedy:
1. The phase setting may require adjustment. Select Phase from the Picture Adjust menu
([PIC]) then determine if adjusting the phase improves the display.
Symptom:
The display is reversed or upside down.
Cause/Remedy:
1. The projector scan configuration is not set correctly for the installation type.
Symptom:
The display is not sharp or "clean".
Cause/Remedy:
1. Display adjustment may be required. Adjust the brightness, contrast, focus, and detail
settings.
2. Is a BNC T connector being used? Use a distribution amplifier to boost signal levels.
3. Is the input signal properly terminated?
4. The screen size may be too large. As screen size increases, magnification increases which
reduces brightness. This then reduces the contrast ratio which affects legibility. Sharp
defined edges become soft and fuzzy.
5. The source input signal may be of low quality.
Symptom:
Display quality seems to drift (from good to bad, bad to good, etc.).
Cause/Remedy:
1. The operating temperature of the projector may not be constant. Is the projector close to
heating and/or air conditioning vents? The ambient temperature after warm-up should be
kept constant below 35
E
C (95
E
F). Make sure none of the projector ventilation slots are
obstructed.
2. The source input signal may be of low quality.
3. The horizontal or vertical frequency of the input may have changed at the source end. For
the selected source, set ASR to on. The projector will then try to use display parameter
settings which are best matched for the source.
Symptom:
Colors on the display are not accurate (when using the Marquee Multi-standard Decoder).
Cause/Remedy:
1. Color and tint settings may require adjustment.
Symptom:
The display is not rectangular in shape.
Cause/Remedy:
1. The geometry settings may not be set correctly. Adjust the display geometry settings. (Press
[
GEOM
] for the Geometry menu).
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