Chroma Emphasis F0 Adjustment (Va-68 Board); 10-5-12, Rec C Rf Level Adjustment (Va-68 Board) - Sony Video8 CCD-F501 Service Manual

10-5-11. Chroma Emphasis fo Adjustment.
(VA-68 Board)
Mode Recording
Signal Color bar «
Pin @ of 1C203
Measuring Instrument | Oscilloscope
Adjusting Element FL302
Specified Value
Measurement Point
Minimum fo component
Adjusting method:
1) Adjust F302 so that the amplitude of flat red portion of the
chroma signal becomes minimum.
Minimize amplitude of flat red
portion of chroma signal
Fig. 10-19. Chroma emphasis fo adjustment
10-5-12. REC C RF Level. Adjustment (VA-68 Board)
Mode Recording
Signal Color bar
Measurement Point _| Pin © of CNSO7
Measuring Instrument | Oscilloscope
{justing Element RV301
Specified Value 120+ 10 mV;
Adjusting method:
1) Adjust RV301 so that the amplitude of flat red portion of the
chroma signal becomes 120 + 10 mVp-p.
Adjust amplitude of flat red portion of
chroma signal to 120 + 10 mVp-p.
10-5-13. REC Y Level Adjustment (VA-68 Board)
Mode Recording
Signal No signal
Measurement Point Pin © of CN507
Oscilloscope
Measuring Instrument | 20 MHz BAND WIDTH LIMITER:
ON
Adjusting Element | RVIOL
Specified Value 240 + 10 mVp-p
Note: Be sure to use MP type tape.
(Pin ® of CN507 should be "L".)
Adjusting method:
1) Adjust RVIOI for 240 + 10 mVp-p.
Center of
ee line width
—>| approx. fe Center of
023psec luminance tine width
Fig. 10-21,
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