Whack it once, whack it twice – and – it springs to life! Ok, where are the bad connections on this one?
The previous problem had to do with startup drive to an SCR based power supply. Once started, however, the circuitry involved was not active so the new problem must be, well, new. I remove the back and start the hunt….. Soldering is pretty good except for a few spots – one is a just visible crack around the base pin of the horizontal output transistor. Hey, that looks promising…. Unfortunately, I am unable to confirm that soldering this pin is *the* solution since it is so erratic. Although I was able to restore operation with my special whack(tm), I have never been able to make it go off in this manner. While I am in there, I also resolder a few other power components and the video source select switch because it had such an ugly soldering job. 🙁 I also replace my startup resistor since the one I was using seemed to have a power rating just a tad too small. However, the cause of the erratic behavior was almost certainly the crack at the HOT. Operation *is* now solid but only tim
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