W/B Low Adjustments; M Board Adjustment; Current Detection 0 Set Adjustment - Sony VPL-X2000U Service Manual

3-5-6. W/B LOW Adjustments

1. Switch the INPUT-A input signal to the VGA 80 IRE
flat field signal, and set to COLOR TEMP LOW. Set
GAIN R, G, B and BIAS R, G, B to the same value as
the HIGH data.
2. Next increase the value of Red GAIN by 25.
3. Perform tracking so that the following specification is
satisfied.
Adjust G and B without changing Red GAIN.
80 IRE White Chrominance
<Specification> (x, y)=(0.300 ± 0.003, 0.330 ± 0.003)
4. Switch the INPUT-A input signal to the VGA 20 IRE
flat field signal.
5. Adjust the W/B adjust BIAS G and BIAS B data so that
the white color temperature satisfies the following speci-
fication.
20 IRE White Chrominance
<Specification> (x, y)=(0.300 ± 0.003, 0.330 ± 0.003)
6. Switch the INPUT-A input signal to the 80 IRE flat field
signal.
7. Adjust the W/B adjust GAIN G and GAIN B data so that
the white chrominance satisfies the following specifica-
tion.
80 IRE White Chrominance
<Specification> (x, y)=(0.300 ± 0.003, 0.330 ± 0.003)
8. Repeat steps 4 to 7 to perform tracking so that the speci-
fication is satisfied.

3-6. M BOARD ADJUSTMENT

3-6-1. Current Detection 0 Set Adjustment

Set CONTROL-S IN to no lord (open).
Adjust RV2901 so that TP2901 (0 set) becomes 30 mV ± 10
mV.
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