05-06-2007, 09:34 PM
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VideoKarma Member
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Join Date: Dec 2002
Location: USA
Posts: 3,147
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Quote:
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Originally Posted by Adam
Finally, not being able to find the source of my troubles, but pretty sure it did have to do with the color sync circuits, I hauled the scope behind the set and tested the 3.58mhz oscillator. I was getting a signal, I was trying to figure out if the frequency was right or not, then I just decided to try to hook the probe to one of the leads going to the crystal, and see what I got, then when I looked at the picture on the screen (the set not the scope) the color was back. I removed the scope probe, not working again. I tried just clipping a wire where I had the probe, and it still worked. I resoldered the crystal to the board, and that was all it needed.
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Modern scope probes have about 10pF of capacitence, so a 10pF cap to ground might be what you needed.
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