Sony KZ-32TS1U, Service Manual

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KZ-32TS1U(U/C) 2-2
2-2. Calibration Adjustment of A/D Converter and
Video Coder
2-2-1. Preparation for adjustment
1. Set [RGB MODE] of the Custom Setup menu in the service mode to
[Other].
2. Set the [Cal Mode] of the AD Converter in the service mode to [ON].
2-2-2. RGB input adjustment
1. Input All white 90 IRE signal of VGA (640x480/60Hz) to the RGB input
terminal.
2. Select RGB Calibration from the AD Converter menu then, Adjust the R
and B gain in the menu and balance so that the detection values of R and
B is approximate to the detection value of G.
3. Adjust the Sub Contrast (RGB) and then, adjust the detection values of R,
G, and B to the set value.
Detection set value: 230 ± 3
4. Set the RGB input signal to All gray 20 IRE signal of VGA (640x480/
60Hz).
5. Adjust the RGB Bias and then, adjust the detection values of R, G, and B
to the set value.
Detection set value: 51 ± 3
6. Repeat step 1 to 5 described above until the detection set value is ob-
tained.
2-2-3. Component input adjustment
1. Input All white 90 IRE signal of 1080/60i to the component input termi-
nal.
2. Select YUV Calibration from the AD Converter menu.
3. Adjust the Sub Contrast (YUV) and then, adjust the detection values of G
to the set value.
Detection set value: 230 ± 3
4. Set the component input signal to All gray 20 IRE signal of 1080/60i .
5. Adjust the Sub Bright (YUV) and then, adjust the detection values of G
to the set value.
Detection set value: 51
±
3
6. Adjust the CB Offset (YUV) and then, adjust so that the detection value
of B is the same as G value.
7. Adjust the CR Offset (YUV) and then, adjust so that the detection value
of R is the same as G value.
8. Repeat step 5 to 7 until the detection set value in step 5 above is obtained.
9. Repeat step 3 to 8 until the detection set value in steps 3 and 5 above are
obtained.