NDS Radiance Ultra SERIES, User Manual

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Troubleshooting | 33
Troubleshooting
Display Troubleshooting
Image Size is Large for the Screen (VGA, RGBS, YPbPr, or SOG analog inputs only)
If the image does not appear to be the correct format, then SmartSync must be run. To run SmartSync, press the
MENU button. In the Picture Menu, tap the
SCROLL button to highlight SmartSync and tap the button.
SmartSync will run and optimize the image display properties.
Ghosting in Characters
Ghosting in characters is usually attributed to reflections in the video cable or source. Use a high quality cable
and, if possible, lower the vertical refresh rate. Lower scan rates can help eliminate reflections. Unlike a CRT, a flat-
panel will not flicker at lower refresh rates (60 Hz is optimal) and data update will be the same at all refresh rates.
Character Jitter (VGA, RGBS, YPbPr, SOG analog inputs only)
If text characters seem to be “shaky” or bold, then Sharpness, Frequency and/or Phase may require adjusting. See
“Setting Frequency, Phase and Sharpness” below.
Character Noise and Vertical Distortion (VGA, RGBS, YPbPr, or SOG analog inputs only)
The Frequency adjustment expands or contracts the horizontal size of the displayed image. The displayed image
may be too wide or too narrow and vertical banding and pixel jitter may appear in grays and light colors. Adjust
the Frequency until the image just fits the screen. Horizontal position adjustment can be used to verify that
Frequency is set correctly. Line up the image on the left edge of the screen and then shift by one “click” to the
right. The image should have one column off the screen on the right side if the Frequency is set correctly.
Testing and Adjusting Frequency (VGA, RGBS, YPbPr, or SOG analog inputs only)
Using a connected laptop, open a blank text file, center the file window in the display, and set the font size and
style to 8 points Regular. Tap the Enter key to move the cursor down to the center of the page, and then press
and hold the Shift and
+ keys to create a row of + symbols.
Inconsistent lighter or darker display variations of the + symbols is an indication that the Frequency parameter
requires adjustment. Tap the
MENU
button to open the Display Menu, tap the button to select the Picture
Menu, then tap the
SCROLL
button to select the Frequency parameter. Next, tap the or buttons to increase
or decrease Frequency until reaching a point where all + symbols display equally.
Note: Sharpness and Phase are subtle adjustments best set using a display calibration program.
Black Screen
Power the display Off and On. If the logo screen appears then the display is working properly. Check if the power
management feature (DPMS) is enabled. A “Searching” message appears in the lower right hand corner when a
video source is not present.