ViewSonic VG921m-2, Service Manual

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ViewSonic Corporation Confidential - Do Not Copy
VG921m-2
1.5.7 White Balance
Test Signal: 1280x1024@60Hz
Test Pattern: White and Black Pattern
1.5.8 R, G, B, Colors Contrast
Test Signal: 1280x1024@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: 1280x1024@60Hz
Test Pattern: Full White Pattern
- Check and see if it is in normal condition.
1.5.10 Dead Pixel and Line
Test Signal: 1280x1024@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
- Check if the Mura can pass 8% ND Filter.
1.5.12 Audio
Test Signal: Voice signal (optional, depend on model)
Test Pattern: liberty
- Make sure there is audio output.
- Make sure that audio function (volume
≦
80%) is working without noise and
resonance.
- Make sure that the sound of right and left speakers are in balance.
1.5.13 Check for Secondary Display Modes
Test Signal : Analog
640*350@70Hz 640*480@60HZ / 75HZ 720*400@70Hz
800*600@60HZ / 75HZ 832*624@75Hz 1024*768@60HZ / 75HZ
1280x1024@75Hz
- Normally when the primary mode 1280x1024@60Hz is well adjusted and compliant