Changhong Electric PT4216 Service Manual page 31

5.5、 RF input full color stripe signal, the waveform of UOC vertical sync signal,
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the 22th pin of U201,the 105 pin of U400 is like this:
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5.6、RF input gray ladder signal, the waveform of the 18 pin of sub tuner UT921,the 8 pin of XP926，
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the 10 pin of SAA7115 is like this:
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