Color Temperature Adjustment - Sony HDVF-EL70 Service Manual

4-2. Color Temperature Adjustment

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Apply an electric current for about 30 minutes and perform adjustment after luminance is stabilized.
1. Set COLOR TEMP to LOW.
Setting MENU: SERVICE
PAGE: S03 COLOR TEMP
ITEM: COLOR TEMP → LOW
2. Execute steps (1) and (2) below and perform ADJUST GAIN adjustment.
(1) Set ADJUST ITEM to GAIN.
Setting MENU: SERVICE
PAGE: S03 COLOR TEMP
ITEM: ADJUST ITEM → GAIN
(2) Switch ADJUST GAIN R, G, and B for adjustment so that the color temperature in the center of a
screen satisfies specifications.
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Fix the gain of either R, G, or B to 256, and adjust the gain so that the gain of other two colors
does not exceed 256.
Setting MENU: SERVICE
PAGE: S03 COLOR TEMP
ITEM: ADJUST GAIN R
ADJUST GAIN G
ADJUST GAIN B
Measuring equipment: Display color analyzer
Measurement point:
Specifications:
3. Execute steps (1) to (3) below and perform ADJUST BIAS adjustment.
(1) Set ADJUST ITEM to BIAS.
Setting MENU: SERVICE
PAGE: S03 COLOR TEMP
ITEM: ADJUST ITEM → BIAS
(2) Set ADJUST BIAS G data to "0". (ADJUST BIAS G = Fixed to "0".)
(3) Adjust ADJUST BIAS R and B so that the color temperature in the center of a screen satisfies
specifications.
Setting MENU: SERVICE
PAGE: S03 COLOR TEMP
ITEM: ADJUST BIAS R
ADJUST BIAS B
Measuring equipment: Display color analyzer
Measurement point:
Specifications:
4. Repeat steps 2 and 3 so that each specification is satisfied.
5. Set ADJUST ITEM to OFF.
Setting MENU: SERVICE
PAGE: S03 COLOR TEMP
ITEM: ADJUST ITEM → OFF
HDVF-EL70/HDVF-EL75
Center of screen
x = 0.313 ?0.005
y = 0.329 ?0.005
Center of screen
x = 0.313 ?0.005
y = 0.329 ?0.005
4-3