ViewSonic VP720B Service Manual - Page 29

Test Pattern: White, RGB, Black, & Grey

Page 29 highlights

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≦80%) 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*350@70Hz; 640*480@60HZ 720*400@70Hz; 800*600@60HZ/70HZ/75HZ 832*624@75Hz, 1024*768@60HZ/70HZ/75HZ 1280*1024@60/75Hz Digital: 640*350@70Hz; 640*480@60HZ 720*400@70Hz; 800*600@60HZ/70HZ/75HZ 1024*768@60/70/72/75; 1152*870@75Hz, 1280*1024@60Hz/75HZ - 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. 1.5.14 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. 1.5.15 Power Off Monitor Turn off the monitor by pressing "Power" button. ViewSonic Corporation Confidential - Do Not Copy 26 VP720-1_VP720b-1

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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
80%) 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*350@70Hz; 640*480@60HZ
720*400@70Hz; 800*600@60HZ/70HZ/75HZ
832*624@75Hz, 1024*768@60HZ/70HZ/75HZ
1280*1024@60/75Hz
Digital: 640*350@70Hz; 640*480@60HZ
720*400@70Hz; 800*600@60HZ/70HZ/75HZ
1024*768@60/70/72/75; 1152*870@75Hz,
1280*1024@60Hz/75HZ
-
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.
1.5.14 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.
1.5.15 Power Off Monitor
Turn off the monitor by pressing “Power” button.
ViewSonic Corporation
Confidential – Do Not Copy
VP720-1_VP720b-1
26