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#9
06-30-2015, 11:19 PM
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I would definitely not replace everything that you already replaced on the vertical board. If you look at this article, you'll see exactly which caps I replaced on that board, along with the Sams diagram of the board:
http://antiqueradio.org/RCACTC-7ColorTelevision.htm I basically replaced all of the "maroon drops" as well as any bumblebee caps. Height and linearity controls work together, and they affect each other somewhat. Try making the picture too large vertically with the height control. Then adjust the linearity control to make the top and bottom squares more equal. Then readjust the height control to make it a little smaller. Then adjust the linearity control again. By going back and forth, making small changes, soon you'll get an idea how these controls affect each other and you should be able to get a screen with normal linearity. If you still can't get good linearity (and a screen that is filled vertically), then it is time to look at other components in the vertical circuits -- AFTER you double-check all of your replacements on that board to make sure that you didn't accidentally install a cap of the wrong value. It's possible you'll want to replace more caps on the main chassis, but that's a question for another day. That chassis contains the color circuitry and the gospel is that you worry about color AFTER you have obtained a normal black and white picture. Phil Nelson Phil's Old Radios http://antiqueradio.org/index.html 
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