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Here's the latest news: Found the problem with Y signal failure: the original kitbuilder failed to solder various connection on the "color board." The intermittency was caused by a wire just stuck in a hole. Every time the board was touched the signal would be fail. I'm willing to bet that I haven't found all of the "non-solders" yet, but I'll be more eagle-eyed as this goes on. I realize now how easy I've had it with previous restorations on sets which were factory produced. At least you knew that at one time they did work in the intended manner. You don't know that with kits.
Now to solve the chroma lock problem. My Tek scope failed yesterday, so time to switch to another one!
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