Color Temperature Adjustment With A Test Signal Generator - Sony VPH-G90U Service Manual

3-6-2. Color Temperature Adjustment with a
Test Signal Generator
Color Temperature 9300 d d d d d K Adjustment
1. Turn on the power and warm up for about 20 minutes.
2. Input the 100 IRE White signal to the VIDEO IN
connector.
3. Press the W/B GAIN key, and select "9300" with
POSITION +/_ keys.
4. Press the PATTERN key several times to select the 100
IRE White signal input at VIDEO IN connector.
5. Press the ADJ G key to set the GREEN adjustment
mode, and adjust the gain for maximum.
6. Press the STATUS OFF key to erase the characters
displayed on the screen.
7. Attach the Lens-ball of the W/B checker to VPH-G90's
lens.
[Gain Adjustment (100 IRE)]
Note: Normally, the maximum green bars indication
is 200 %; however, it becomes 100 % in
GREEN adjustment mode.
8. Press the ADJ B key to set the BLUE adjustment mode.
9. Press the W/B GAIN key. Adjust the blue gain for 60
% with ←, → keys. If not, decrease the green gain with
arrow keys.
10. Press the ADJ R key to set the RED adjustment mode.
Adjust the red gain for 50 % with ←, → keys.
[Bias Adjustment (10 IRE)]
11. Input the 10 IRE White signal to the VIDEO IN
connector.
12. Press the ADJ G key to set the GREEN adjustment
mode.
13. Press the W/B BIAS key. Press the CUT OFF R and B
keys, then adjust the Y level for 180 % with ←, →
keys.
14. Press the ADJ B key to set the BLUE adjustment mode.
Adjust the blue gain for 60 % with ←, → keys.
15. Press the ADJ R key to set the RED adjustment mode.
Adjust the red gain for 50 % with ←, → keys.
16. Repeat steps 8 to 10 and steps 11 to 15 several times.
17. Press the MEMORY key.
18. Remove the lens-ball attached in step 7.
3-16
Color Temperature 6500 d d d d d K Adjustment
1. Input the 100 IRE White signal to the VIDEO IN
connector.
2. Press the W/B GAIN key, and select "6500" with
POSITION +/_ keys.
3. Press the PATTERN key several times to select the 100
IRE White signal input at VIDEO IN connector.
4. Press the ADJ G key to set the GREEN adjustment
mode, and adjust the gain for maximum.
5. Press the STATUS OFF key to erase the characters
displayed on the screen.
6. Attach the Lens-ball of the W/B checker to VPH-G90's
lens.
[Gain Adjustment (100 IRE)]
Note: Normally, the maximum green bars indication
is 200 %; however, it becomes 100 % in
GREEN adjustment mode.
7. Press the ADJ B key to set the BLUE adjustment mode.
8. Press the W/B GAIN key. Adjust the blue gain for 40
% with ←, → keys. If not, decrease the green gain with
arrow keys.
9. Press the ADJ R key to set the RED adjustment mode.
Adjust the red gain for 60 % with ←, → keys.
[Bias Adjustment (10 IRE)]
10. Input the 10 IRE White signal to the VIDEO IN
connector.
11. Press the ADJ G key to set the GREEN adjustment
mode.
12. Press the W/B BIAS key. Press the CUT OFF R and B
keys, then adjust the Y level for 180 % with ←, →
keys.
13. Press the ADJ B key to set the BLUE adjustment mode.
Adjust the blue gain for 40 % with ←, → keys.
14. Press the ADJ R key to set the RED adjustment mode.
Adjust the red gain for 60 % with ←, → keys.
15. Repeat steps 7 to 9 and steps 10 to 14 several times.
16. Press the MEMORY key.
17. Remove the lens-ball attached in step 6.
VPH-G90E/G90U/G90M