ViewSonic VLCDS25973-2W Service Manual page 25

Dead Pixel and Line
5-6.9
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 Mura
Test Pattern: White, RGB, Black & White
Test Tool: 8% ND filter
- Use 8% ND filter to check if any Mura on the screen.
5-6.11 Check for Secondary Display Modes
Test Signal for GM5321 Scaler:
Analog : 640*350@70Hz; 640 x 400 @ 60/70Hz
Digital : 640*350@70Hz; 640 x 400 @ 60/70Hz
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5-6.12 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" (Refer to Chapter 6-3) again.
5-6.13 Power Off Monitor
Turn off the monitor by pressing "Power" button, and turn off the "Switch" that is on the back of the
monitor.
ViewSonic Corporation
640*480@50/60/67/72/75/85Hz;
720*400@70Hz; 800*600@56/60/72/75/85Hz;
832*624@75Hz, 1024*768@60/70/72/75/85Hz;
1152*864@75Hz, 1152*870@75Hz;
1280*1024@75Hz, 1280*720@60Hz
640*480@50/60/67/72/75/85Hz;
720*400@70Hz; 800*600@56/60/72/75/85Hz;
832*624@75Hz, 1024*768@60/70/72/75/85Hz;
1152*864@75Hz, 1152*870@75Hz;
1280*1024@75Hz, 1280*720@60Hz
Normally when the primary mode 1280*1024@60Hz 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.
Confidential - Do Not Copy
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VP191b/s-1/-2