ViewSonic VG920-1, Service Manual

Page: 29 / 85

1024 x 768 @ 70Hz, 56.5kHz
1024 x 768 @ 72Hz, 58.1kHz
1024 x 768 @ 75Hz, 60.0kHz
1280 x 1024 @ 60Hz, 63.4kHz
1280 x 1024 @ 75Hz, 79.97kHz
1280x 720 @ 60Hz, 45kHz 1024 x 768 @ 70Hz, 56.5kHz
1024 x 768 @ 72Hz, 58.1kHz
1024 x 768 @ 75Hz, 60.0kHz
1280 x 1024 @ 60Hz, 63.4kHz
1280 x 1024 @ 75Hz, 79.97kHz
1280x 720 @ 60Hz, 45kHz
Function Test Display Pattern
Item Test Content Pattern Specification Remark
1
Frequency &
Tracking
Fine Line Moire
Eliminate visual wavy
noise.
Figure 1
2
Contrast/Bright
ness
16 Gray Scale
16 gray levels sh should
be distinguishable.
Figure 2
3 Boundary
Horizontal&Vertical
Thickness
Horizontal and Vertical
position of video should
be adjustable to be
within the screen frame.
Figure 3
4
RGB Color
Performance
RGB Color Intensities
Contrast of each R, G,
B, color should be
normal.
Figure
4,5,6
5
Screen
Uniformity &
Flicker
Full White
Should be compliant
with the spec.
Figure 7
6
Dead
Pixel/Line White Screen & Dark
Screen
The numbers of dead
pixels should be
compliant with the spec.
Figure 7,8
7 White Balance White & Black Pattern
The screen must have
the pure white and black
pattern, no other color.
Figure 9
Fine Line Morie Pattern (Figure1) Gray Scale Pattern (Figure2)
26
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nfidential - Do Not Copy VG920-1