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2-4. White Balance Adjustment on
Servicing
2-4-1. Computer
Preparation
1. Set the unit from the menu as follows.
Picture Mode:
Cinema
Adjust Pictture
Contrast:
80
Brightness:
50
Gamma Correction: OFF
Cinema Black Pro:
Iris Control:
ON
Lamp Control:
Low
2. Set each mode of "Color Temp:" as follows.
Gain: 150
Bias:
127
3. Set INPUT-A Signal Sel. to "Computer".
Adjustment
1. Middle
1. Set "Color Temp:" to Middle.
2. Input WXGA 80IRE Window white (3 colors: RGB)
to INPUT-A and adjust the GAIN of G of white
balance so that the chromaticity (y80) is within
specification.
x80: 0.294 ± 0.002
y80: 0.310 ± 0.003
Then, set the reference color as follows and adjust the
GAIN of colors other than the reference color of white
balance so that the chromaticity (x80 and y80) is
within specification.
x80 > 0.294: B reference
y80 < 0.294: R reference
3. Input WXGA 20IRE Window white (3 colors: RGB)
to INPUT-A and adjust the BIAS of colors other than
G of white balance so that the chromaticity (x20 and
y20) is within specification.
x20: 0.294 ± 0.002
y20: 0.310 ± 0.003
4. Input WXGA 80IRE Window white (3 colors: RGB)
to INPUT-A and adjust the GAIN of colors other than
the reference color of white balance so that the
chromaticity (x80 and y80) is within specification.
2-12
5. Repeat steps 3 and 4, and adjust each GAIN and BIAS
of RGB so that x and y are within the following
specification.
x: 0.294 ± 0.002
y: 0.310 ± 0.003
6. Save the adjustment values.
2. High
1. Set "Color Temp:" to High.
2. Input WXGA 80IRE Window white (3 colors: RGB)
to INPUT-A and adjust the GAIN of G of white
balance so that the chromaticity (y80) is within
specification.
x80: 0.284 ± 0.002
y80: 0.298 ± 0.003
Then, set the reference color as follows and adjust the
GAIN of colors other than the reference color of white
balance so that the chromaticity (x80 and y80) is
within specification.
x80 > 0.294: B reference
y80 < 0.294: R reference
3. Input WXGA 20IRE Window white (3 colors: RGB)
to INPUT-A and adjust the BIAS of colors other than
G of white balance so that the chromaticity (x20 and
y20) is within specification.
x20: 0.294 ± 0.002
y20: 0.310 ± 0.003
4. Input WXGA 80IRE Window white (3 colors: RGB)
to INPUT-A and adjust the GAIN of colors other than
the reference color of white balance so that the
chromaticity (x80 and y80) is within specification.
5. Repeat steps 3 and 4, and adjust each GAIN and BIAS
of RGB so that x and y are within the following
specification.
x: 0.284 ± 0.002
y: 0.298 ± 0.003
6. Save the adjustment values.
3. Low
1. Set "Color Temp:" to Low.
2. Input WXGA 20IRE Window white (3 colors: RGB)
to INPUT-A and adjust the BIAS of colors other than
G of white balance so that the chromaticity (x20 and
y20) is within specification.
x20: 0.313 ± 0.002
y20: 0.329 ± 0.003
VPL-HS20
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