ViewSonic VP171 Service Manual page 42

5-6.6 White Balance
Test Signal : 1280*1024@60Hz
Test Pattern: Full White and Black Pattern
- Refer to Chapter 5-3
5-6.7 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.
5-6.8 Screen Uniformity and Flicker
Test Signal: 1280*1024@60Hz
Test Pattern: Full White Pattern
- Check and see if it is in normal condition.
5-6.9 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.
5-6.10 Check for Secondary Display Modes
Test Signal:
Analog : 640*350@70Hz;
720*400@70Hz;
832*624@75Hz,
1152*870@75Hz, 1280*720@60Hz, 1280*1024@60/75Hz
Digital : 640*350@70Hz; 640*450@75Hz; 640*480@60/72/75Hz;
720*400@70Hz;
1024*768@60/70/72/75/85Hz; 1152*870@75Hz, 1280*720@60Hz, 1280*1024@60/75Hz
- Normally when the primary mode 1280*1024@75Hz is well adjusted and
compliant with the specification, the secondary display modes will also be
compliant with the spec. It is still necessary to check with the general test pattern
to make sure every secondary is compliant with the specification.
5-6.11 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.
5-6.12 Power Off Monitor
Turn off monitor by pressing “Power” button, and turn off the “Switch” that is back of the monitor.
ViewSonic Corporation
640*480@60/67/72/75/85Hz;
800*600@56/60/72/75/85Hz;
1024*768@60/70/72/75/85Hz;
800*600@56/60/72/75/85Hz;
37
Confidential – Do Not Copy
VP171/b/s