![background image](http://html.mh-extra.com/html/viewsonic/vlcds25973-4w/vlcds25973-4w_service-manual_1021324025.webp)
1.5.6 Boundary
Test Signal: 1280*1024@60Hz
Test Pattern: Horizontal & Vertical Line Thickness Pattern
- Check and see if the image boundary is within the screen frame.
- If not, readjust by the following steps:
(a) Select and enter “
Manual Image Adjust
” function on OSD Main Menu.
(b) Then, select and enter “
Horizontal Size
” or “
Horizontal/Vertical Position
” function to adjust the
video
boundary to be full scanned and within screen frame.
1.5.7 White Balance (Auto Gain) (Refer to Chapter III-3. Hot Keys for Function Controls)
Test Signal: 1280*1024@60Hz
Test Pattern: White and Black Pattern
1.5.8 R, G, B, Colors Contrast
Test Signal: 1280*1024@60Hz
Test Pattern: R, G, B, Color Intensities Pattern and 16 Gray Scale Pattern
- Check and see if each color is normal and distinguishable.
- If not, please return the unit to repair area.
1.5.9 Screen Uniformity and Flicker
Test Signal: 1280*1024@60Hz
Test Pattern: Full White Pattern
- Check and see if it is in normal condition.
1.5.10 Dead Pixel and Line
Test Signal: 1280*1024@60Hz
Test Pattern: Dark and White Screen Pattern
- Check and see if there are dead pixels on LCD panel with shadow gauge and filter film.
- The total numbers and distance of dead pixels should be compliant with the spec.
1.5.11 Mura
Test Pattern: White, RGB, Black, & Grey
Test Tool: 8% ND Filter
- Use 8% ND Filter to check if any Mura on the screen.
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ViewSonic
Corporation
Co
nfidential
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Do
Not
Copy
VP912s/b
Summary of Contents for VLCDS25973-4W
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