ViewSonic VX2000 Service Manual - Page 36

R.G.B. Colors Contrast, Screen Uniformity and Flicker, Dead Pixel and Line, Check for Secondary - specifications

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VX2000 series VX2000 Series Service Manual 6-5.5 R.G.B. Colors Contrast Test Signal: 1600*1200@60Hz Test Pattern: R.G.B. Colors 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 6-5.6 Screen Uniformity and Flicker Test Signal: 1600*1200@60Hz Test Pattern: Full White Pattern * Check and see if it is in normal condition. 6-5.7 Dead Pixel and Line Test Signal: 1600*1200@60Hz Test Pattern: Dark 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. 6-5.8 Check for Secondary Display Modes Test Signal: 640*350@70Hz 720*400@70Hz 832*624@75Hz 1280*1024@60/75Hz 640*480@60/67/72/75/85Hz; 800*600@56/60/72/75/85Hz; 1024*768@60/70/72/75/85Hz; 1600*1200@60Hz Normally when the primary mode 1600*1200@60Hz is well adjusted and compliant with the specification, the secondary display modes will also be compliant with spec. They still need to be checked and verified though. 6-5.9 All Mode 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. (ref. 6-5.1) ViewSonic Corporation Confidential - Do Not Copy VX2000-1 6-6

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VX2000 Series Service Manual
VX2000 series
6-5.5
R.G.B. Colors Contrast
Test Signal:
1600*1200@60Hz
Test Pattern:
R.G.B. Colors 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
6-5.6
Screen Uniformity and Flicker
Test Signal:
1600*1200@60Hz
Test Pattern:
Full White Pattern
*
Check and see if it is in normal condition.
6-5.7
Dead Pixel and Line
Test Signal:
1600*1200@60Hz
Test Pattern:
Dark 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.
6-5.8
Check for Secondary Display Modes
Test Signal:
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;
1280*1024@60/75Hz
1600*1200@60Hz
6-5.9
All Mode Reset
After final QC step, we have to erase all saved changes again and
restore the factory defaults. You should do ²All Mode Reset± again. (ref. 6-5.1)
ViewSonic Corporation
6-6
Confidential – Do Not Co
py
VX2000-1
Normally when the primary mode 1600*1200@60Hz is well adjusted and compliant with the
specification, the secondary display modes will also be compliant with spec. They still need to
be checked and verified though.