Westinghouse LTV-27w2 Service Manual page 8

Video Performance Test
The following tests should be conducted by connecting the video signal to one port at a time.
AV port
Color Bar
• The color from left to right should be White, Yellow, Sky Blue, Green, Magenta,
Pattern
Red, and Blue.
(COL_SMPTE)
• Some smearing or dot crawl between color
bars is acceptable.
• Use the Blue color filter to check Hue and
Saturation are in the optimized point.
(Saturation - Blue and White color should be
the same when seen through a blue color
filter.)
(Hue - Magenta and Sky Blue color should
be the same when seen through a Blue
color filter.)
Crosshatch • Crosshatch pattern should have no visible noise.
Multi Burst • In low bandwidth pattern, there shouldn't
Pattern
be any dots on the transition edges.
• In high bandwidth pattern, there shouldn't
be any loss of resolution and the scaling
should be correct.
• This is a sample with no visible noise.
• There shouldn't be any visible noise at transition edges.
Black & White
Pattern
• The gray scale should not be saturated at default value -
Gray Scale
Pattern
27" & 32" COLOR LCD TV DISPLAY
VIDEO PORTS TO TEST
S-Video port YCbCr/YPbPr TV Composite Video*
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