ViewSonic VA902-3, Service Manual

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F. Adjust Color Temperature:
(1) EEPROM INIT (5 BLOCKS):
Press
“ ▼ ” key move cursor to EEPROM INIT, Press “ ” key then
monitor will INIT ADC value.
(2) Press “ ▲ ” key move cursor to “White Balance”, Press “ ” key do
white balance adjustment.
(3) Press “ ▼ ” key move cursor to “Color Temperature Adjust”, Press
“ ” key, Then OSD will display Fig.2
(4) 9300K verify: move cursor to 9300K Press “ ” key.
Press “ ▼ ”, “ ▲ ” key adjust R.G.B value
x=0.283 ± 0.02
y=0.298 ± 0.02
Press “ ”key return to Fig.2
(5) 6500K verify: Repeat (4) press “ ▼ ”, “ ▲ ” move cursor to 6500K press
“ ” key
x=0.313 ± 0.02
y=0.329 ± 0.02
(6) 5400K verify: Repeat (4) press “ ▼ ”, “ ▲ ” move cursor to 5400K press
“ ” key
x=0.332 ± 0.02
y=0.348 ± 0.02
(7) Press “ ” key go back to Fig.2, Then press “ ” key return to Fig.1,
Power key OFF/ON quit factory mode.
G. Color Temperature & Luminance Verify:
BRIGHTNESS MAX, CONTRAST MAX
9300K: x=0.283
± 0.02 y=0.298 ± 0.02
6500K: x=0.313 ± 0.02 y=0.329 ± 0.02
5400K: x=0.332 ± 0.02 y=0.348 ± 0.02
1.5.8 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.
1.5.9 Screen Uniformity and Flicker
Test Signal: 1280*1024@60Hz
Test Pattern: Full White Pattern
- Check and see if it is in normal condition.
(Fig.2)
2
2
2
2
1
2
2
1 1
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