ViewSonic VG712s Service Manual page 32

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
- 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¡Ø80%) 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 x 350 @ 70Hz; 640 x 400 @ 60Hz; 640 x 400 @ 70Hz;
640 x 480 @ 50/60/67/72/75/85Hz; 720 x 400 @ 70Hz; 800 x 600 @ 56/60/72/75/85Hz; 832 x 624 @ 75Hz; 1024 x
768 @ 60Hz; 1024 x 768 @ 70/72/75/85Hz; 1152 x 864 @ 75Hz; 1152 x 870 @ 75Hz; 1280 x 1024 @ 75Hz; 1280x
720 @ 60Hz (HDTV).
Digital: 640 x 350 @ 70Hz; 640 x 400 @ 60/70/Hz; 640 x 480 @ 50/60/67/72/75/85Hz; 720 x 400 @ 70Hz; 800 x
600 @ 56/60/75/72/85Hz; 832 x 624 @ 75Hz; 1024 x 768 @ 60/70/72/75/85Hz; 1152 x 864 @ 75Hz; 1152 x 870 @
75Hz; 1280 x 1024 @ 75Hz; 1280x 720 @ 60Hz (HDTV).
- Normally when the primary mode 1280*1024@60Hz is well adjusted and compliant with the specification, the
secondary display modes will be great possible to be compliant with the spec. But we still have to check with the
general test pattern to make sure every secondary is compliant with the specification.
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