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When you check the caps, do so with a dedicated cap tester that tests voltage breakdown, with an eye tube. I had a few CTC16's and when caps began to go bad, it was just one is a 4-section can. I f you are going with more power-up testing, change out that first cap anyway, it gets nailed with 420v of DC, buffered only by that thermistor on the AC side, every time its turned on.
Check then 420 volts on load side of the power supply choke disconnected, it looks like a vertical output transformer with two terminals. One terminal can be disconnected to isolate all downstream caps. Try a slow power up too, say 75-80 volts it may lead you right to the shorted cap via a hot can.
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"When resistors increase in value, they're worthless"
-Dave G
Last edited by DavGoodlin; 08-20-2018 at 01:28 PM.
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