Sharp VL-SW50U Service Manual page 61

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6-2-2-10.
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Iris AE adjustment (For a wide angle lens)
Measuring instrument Oscilloscope
Subject Gray 'scale
Tape
Test point VIDEO-OUT
Adjustment address 347
Adjustment level 700mVp-p : *~oomvp-p
1) Push the lens select switch and out the signal of the wide angle lens.
2) Shoot the gray scale in the standard way. Observe the VIDEO-OUT signal on the oscilloscope screen and rewrite the
data of address 347 to get an amplitude of 700mVp-p as shown above.
6-2-2-11.
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White balance adjustment (For a wide angle lens)
1 Measuring instrument 1 Vector scope
I
Subject
Tape
Test point
Gray scale
VIDEO OUT (Terminated in 75 Q) 1
1 Adjustment address 1 R-GAIN 280, B-GAIN 282 I
Adjustment level
R-Gain 0 % + 3 %
B-Gain 0 % + 3 %
R-Y
B-Y
Center point
1) Adjust the spot to the center of vector scope (R-Y : 0%, B-Y : 0%) using address 280 and 282.
6-2-2-12.
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Color gain adjustment (For a wide angle lens)
Measuring instrument Vector scope
Subject Color bar chart
Tape
Test point
VIDEO OUT (Terminated in 75 Q)
Adjustment address R-Y GAIN 29A
B-Y GAIN 298
R-Y MAT 294
B-Y MAT 296
Adjustment level
R-Y GAIN; Burst ratio 1.2 + 0.1
B-Y GAIN; Burst ratio 1 .O + 0.1
R-Y MAT; 100+2O
B-Y MAT; 344 * 2O
R-Y
R level
-&-$jj&Y
B spot
1) Using the address 29A, adjust the R level to a burst ratio of 1.2. With the address 298, adjust the B level to a burst ratio
of 1.0.
2) Using the address 294, adjust the R phase to 100°. With the address 296, adjust the B phase to 344O.
3) Repeat the above steps 1) and 2).
6-2-2-13.
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Auto white balance adjustment (For a wide angle lens)
Measuring instrument
Vector scope
Subject Gray scale
Tape
Test point VIDEO OUT (Terminated in 75 0)
Adjustment address R-OUT DOOR 286
B-OUT DOOR 288
Adjustment level
R-OUT DOOR; 0 + 3 %
B-OUT DOOR; 0 & 3 %
R-Y
B-Y
Center point
1)
2)
3)
4)
Attach the color temperature conversion filter (JiGHOYA-LB165) to the front of the wide angle lens.
Using the addresses R-OUT DOOR 286 and B-OUT DOOR 288, adjust the spot to the center.
Take off the color temperature conversion filter.
Write FF to the address 1 FE to exil camera signal adjustment mode.
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