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White Balance
Test Signal: 640*480@60Hz
Test Pattern: White and Black Pattern
1.5.8 R, G, B, Colors Contrast
Test Signal: 1024*768@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.
Screen Uniformity and Flicker
Test Signal: 1024*768@60Hz
Test Pattern: Full White Pattern
-
Check and see if it is in normal condition.
1.5.10 Dead Pixel and Line
Test Signal: 1024*768@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.
Mura
Test Pattern: White, RGB, Black, & Grey
Test Tool: 10% ND Filter
-
Check if the Mura can pass 10% ND Filter.
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.
Check for Secondary Display Modes
Test Signal:
Analog: 640*350@70Hz; 640*480@60/67/72/75/85Hz;
720*400@70Hz; 800*600@56/60/72/75/85Hz;
832*624@75Hz, 1024*768@60/70/72/75/85Hz;
Digital: 640*350@70Hz; 640*480@60/72/75/85Hz;
720*400@70Hz; 800*600@56/60/72/75/85Hz;
1024*768@60/70/72/75/85Hz; 1152*870@75Hz,
-
Normally when the primary mode 1024*768@60Hz is well adjusted and
compliant with the specification, the secondary display modes will also 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.
All Modes Reset
After final QC step, we have to erase all saved changes again and restore the
factory defaults. You should do “All Mode Reset” again.
Power Off Monitor
Turn off the monitor by pressing “Power” button.
ViewSonic Corporation
VA503b-1_ VA503m-1
33
Confidential - Do Not Copy
Summary of Contents for VA503b-1
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Page 78: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 75 11 PCB Layout Diagram...
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Page 81: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 78 POWER PCB VIEW...
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