Sanyo VDC-DP7585P Service Manual page 9

2-6. White Balance Adjustment
Adjustment location: Computer screen
Measuring location: VIDEO OUT
Measuring equipment: Oscilloscope, Vectorscope
Subject: Color bar chart
Adjusting method:
1. Use the " " button to be A. IRIS in the adjustment window.
2. Auto iris adjustment will be started automatically.
3. Use the " " button to be M/WB1 in the adjustment window.
4. Display the color bar chart at designated picture angle.
5. Select the M/WB1 and M/WB2 by using the "
button in the adjustment window. Adjust by operating level
scroll bar so that the luminescent spot representing white is
overlapping with the crosshair mark in the center of the
vectorscope.
45 µsec
g
R
75%
100%
YL
yl
G
2-7. Hue and Chroma Adjustment
Adjustment location: Computer screen
Measuring location: VIDEO OUT
Measuring equipment: Oscilloscope, vectorscope
Subject: Color bar chart
1. Use the " " button to be R GAIN in the adjustment window.
2. Display the color bar chart at designated picture angle.
3. Shield light with a lens cap to provide dark condition.
4. Select the R GAIN and B GAIN by using the " " and "
button in the adjustment window.Adjust by operating level
scroll bar so that the red and yellow luminescent spots are
the size and position which are designated in the vectorscope.
5. Select the R HUE and B HUE by using the " " and "
button in the adjustment window. Adjust by operating level
scroll bar so that the red and yellow luminescent spots are
the size and position which are designated in the vectorscope.
" and "
cy
MG
v
W
b
U
B
Cy
mg
"
"
YL
YL
yl
2-8. Y-Gain Adjustment
Adjustment location: Computer screen
Measuring location: VIDEO OUT
Measuring equipment: Oscilloscope
Subject: Gray scale chart
Adjusting method:
1. Display the gray scale chart at designated picture angle.
2. Use the " " button to be "
window.
3. Shield light with a lens cap to provide dark condition.
4. Use the computer's mouse to adjust the Y GAIN in the
adjustment window so that the video out terminal is 700 ±
10 mVp-p.
35 µsec
"
- -
9
45 µsec
cy
g
R
MG
v
R
75%
W
100%
b
U
B
G
Cy
mg
" GAIN in the adjustment
700 mV ± 10 mV
VIDEO OUTPUT