Video W/B Adjustment; High Mode; Low Mode - Sony VPL-PX1 Service Manual

3-4-3. Video W/B Adjustment

3-4-3-1. High Mode

1. Input the 15k Component signal to INPUT-A.
2. The HIGH MODE will be set.
3. Perform the following processes on the 3-3-2 adjust-
ment value, and copy the value to the HIGH MODE.
R GAIN : Adjustment value in LOW Mode –7
G GAIN : Adjustment value in LOW Mode –7
B GAIN : Adjustment value in LOW Mode –7
R BIAS : Adjustment value in LOW Mode +1
G BIAS : Adjustment value in LOW Mode +1
B BIAS : Adjustment value in LOW Mode +1
4. Input the 15k Component Flat Field 80 IRE to INPUT-
A.
5. Lower G GAIN, and adjust the Y value.
6. If Y value is lower than the specification, lower B
GAIN.
If X value is greater than the specification, take Blue
as the reference. If X value is smaller than the specifi-
cation, take Red as the reference.
7. Adjust to the following chromaticity with GAINs other
than the reference color.
8. Memorize the adjustment value.
9. Input the 15k Component Flat Field 30 IRE to INPUT-
A.
10. Adjust to the following chromaticity with BIASs other
than the reference color.
11. Repeat adjustment so that 80 IRE and 30 IRE satisfy
the specification.
12. Memorize the adjustment value.
HIGH MODE chromaticity specification:
(x,y)=(0.275, 0.312) ± 0.005 (80 IRE)
(x,y)=(0.275, 0.312) ± 0.007 (30 IRE)
3-4

3-4-3-2. Low Mode

1. Input the 15k Component signal to INPUT-A.
2. Set LOW MODE.
3. Perform the following processes on the 3-3-2 adjust-
ment value.
R GAIN : Adjustment value in LOW Mode –7
G GAIN : Adjustment value in LOW Mode –7
B GAIN : Adjustment value in LOW Mode –7
R BIAS : Adjustment value in LOW Mode +1
G BIAS : Adjustment value in LOW Mode +1
B BIAS : Adjustment value in LOW Mode +1
4. Input the 15k Component Flat Field 80 IRE to INPUT-
A.
5. Lower G GAIN, and adjust the Y value to this value.
6. If Y value is lower than the specification, lower B
GAIN.
If X value is greater than the specification, take Blue
as the reference. If X value is smaller than the specifi-
cation, take Red as the reference.
7. Adjust to the following color with GAINs other than
the reference color.
8. Memorize the adjustment value.
9. Input the 15k Component Flat Field 30 IRE to INPUT-
A.
10. Adjust to the following color with BIASs other than
the reference color.
11. Repeat adjustment so that 80 IRE and 30 IRE satisfy
the specification.
12. Memorize the adjustment value.
LOW MODE chromaticity specification:
(x,y)=(0.283, 0.326) ± 0.005 (80 IRE)
(x,y)=(0.283, 0.326) ± 0.007 (30 IRE)
VPL-PX1