White Balance Adjustment - Sony VPL-VW90ES Service Manual

2-3. White Balance Adjustment

Preparation
Set Picture Mode to "Cinema 3" and make the following settings.
Contrast: 90
Brightness: 50
Color: 50
Hue: 50
Sharpness: 10
NR: OFF
MPEG NR: OFF
Gamma Correction: OFF
Advanced Iris: OFF
Lamp Control: High
Color Space: Normal
Set each GAIN and each BIAS for RGB to 128.
Bring the ZOOM position of the lens to the center.
Adjustment
High
1. Set Color Temp to "High".
2. Input 1080/60i 20 IRE fl at fi eld (RGB 3 color) into the HDMI1 terminal and adjust BIAS of white
balance for R and B until the chromaticity (x20, y20) satisfi es the specifi cation.
(x20, y20) = (0.284 ?0.002, 0.298 ?0.002)
3. Input 1080/60i 80 IRE fl at fi eld (RGB 3 color) into the HDMI1 terminal and adjust GAIN of white
balance for B and G until the chromaticity (x80, y80) satisfi es the specifi cation.
(x80, y80) = (0.284 ?0.002, 0.298 ?0.002)
4. Repeat the adjustments at 80 IRE and 20 IRE until the specifi cation is satisfi ed.
5. Save the adjusted values.
Middle
1. Set Color Temp to "Middle".
2. Input 1080/60i 20 IRE fl at fi eld (RGB 3 color) into the HDMI1 terminal and adjust BIAS of white
balance for R and B until the chromaticity (x20, y20) satisfi es the specifi cation.
(x20, y20) = (0.294 ?0.002, 0.310 ?0.002)
3. Input 1080/60i 80 IRE fl at fi eld (RGB 3 color) into the HDMI1 terminal and adjust GAIN of white
balance for B and G until the chromaticity (x80, y80) satisfi es the specifi cation.
(x80, y80) = (0.294 ?0.002, 0.310 ?0.002)
4. Repeat the adjustments at 80 IRE and 20 IRE until the specifi cation is satisfi ed.
5. Save the adjusted values.
VPL-VW90ES
2-5 (E)