Sony KE-32TS2U service manual Calibration Adjustment of A/D Converter Video Coder

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].

3.Set the image quality mode to AV professional standard state.

2-2-2. RGB AD 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 gain and the B gain in the menu and balance so that the detection values of R and B approximate to the detection value of G.

3.Adjust the Sub Contrast (RGB), that is, 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, that is, adjust the detection values of R, G, and B to the set value.

Detection set value: 51 ± 3

6.Repeat steps 1 to 5 described above until the detection set value is ob- tained.

2-2-3. Component AD adjustment

1.Input All white 90 IRE signal of 1080/60i to the component input termi- nal.

2.Adjust the Sub Contrast (YUV), that is, adjust the detection value of G to the set value.

Detection set value: 230 ± 3

3.Set the component input signal to All gray 20 IRE signal of 1080/60i .

4.Adjust the Sub Bright (YUV), that is, adjust the detection value of G to the set value.

Detection set value: 51 ± 3

5.Adjust the CB Offset (YUV), that is, adjust so that the detection value of B is the same as that of G.

6.Adjust the CR Offset (YUV), that is, adjust so that the detection value of R is the same as that of G.

7.Repeat steps 4 to 6 until the detection set value in step 4 is obtained.

8.Repeat steps 2 to 7 until the detection set value in steps 2 and 4 are obtained.

KE-32TS2U(UC) 2-2