Sony VPL-PX41, Service Manual

Page: 32 / 136

2-10
VPL-PX35/PX40
2-5-4. LOW Mode of VIDEO
1. Input the NTSC or PAL video signal to the input
connector.
2. In the LOW mode of W/B, adjust the GAIN R for + + + + + 19
higher than the value in the INPUT-D LOW mode,
adjust the GAIN G for
_ _
_ _ _
38 lower than the value in the
INPUT-D LOW mode and adjust GAIN B that is the
_ _ _ _ _ 18 lower than the value in the INPUT-D LOW mode.
3. Adjust BIAS G, BIAS R and BIAS B for the same
value as those of the INPUT-D LOW mode.
2-5-2. LOW Mode of INPUT-D
1. Input the 80 IRE flat field signal to the INPUT-D
connector.
2. In the LOW mode of W/B, adjust the GAIN R for + 15
higher than the value in the HIGH mode, adjust the
GAIN G for
_ _
_ _ _
25 lower than the value in the HIGH
mode and adjust GAIN B that is the same as the value
in the HIGH mode.
3. Adjust BIAS R, BIAS B and BIAS G for the same
value as those of the HIGH mode.
4. Measure the chromaticity (x, y).
5. Input the 30 IRE flat field signal.
6. Adjust the BIAS R and BIAS B in the LOW mode of
W/B until the chromaticity (x, y) that is measured at
step 4 is obtained.
7. Input the 80 IRE flat field signal.
8. Adjust the GAIN R and GAIN B in the LOW mode of
W/B until the chromaticity (x, y) that is measured at
step 4 is obtained.
9. Repeat steps 5 to 8 until the chromaticity (x
±
0.002, y
±
0.004) with reference to the chromaticity (x, y) that
is measured at step 4 is obtained.
2-5-3. HIGH Mode of VIDEO
1. Input the NTSC or PAL video signal to the input
connector.
2. In the HIGH mode of W/B, adjust the GAIN R for
_ _ _ _ _
13 lower than the value in the INPUT-D HIGH
mode, adjust the GAIN G for _ _
_ _ _
11 lower than the value
in the INPUT-D HIGH mode and adjust GAIN B that
is the
+ + + + + 35 higher than the value in the INPUT-D
HIGH mode.
3. Adjust BIAS G, BIAS R and BIAS B for the same
value as those of the INPUT-D HIGH mode.