VG700b Series Service Manual
6-6
VG700b series
6-5.5
R.G.B. Colors Contrast
6-5.6
Screen Uniformity and Flicker
Test Signal:
1280*1024@75Hz
Test Pattern:
Full White Pattern
*
Check and see if it is in normal condition.
6-5.7
Dead Pixel and Line
Test Signal:
1280*1024@75Hz
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@60/67/72Hz;
720*400@70Hz
800*600@56/60/72/75Hz;
832*624@75Hz
1024*768@60/70/72/75Hz;
1152*870@75Hz
1280*1024@60/70/75Hz
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)
Test Signal:
1280*1024@75Hz
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
ViewSonic Corporation
Confidential
– Do Not Copy
VG700b
Normally when the primary mode 1280*1024@6
0
Hz is well adjusted and
compliant with the specification, the secondary display modes will also
be compliant with spec. It is still necessary to check them with the
general test pattern to verify compliance though.
