Quote:
Originally Posted by thomashjr
Hello I found old thread from 2014 and tried to revive it but maybe that is not possible. Has anyone succeeded in resurrecting one of these attractive TVs? This has blown 4A fuse but 5A one still intact. Won't pull any current from wall other than degausser I suspect. I have new PS board electrolytics on the way. A 608 thyristor also on the PS board but is it a regulator or the H out or what? Trying to get right documents for it which might take a while. Thank you for any advice.
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Any Sony from that time period is going to be absolutely riddled with bad electrolytics. I just finished restoring (more or less) a KV-9200 from around the same time and I had to replace every single one of them. They were all either completely open or had turned into a resistor.
It sucks to do (I usually suggest against if at all possible), but the best first steps are to
1) replace all the bad caps. you can either test every single one of them and write down the bad ones, or just do the whole thing. it can be quicker to just do the whole thing
2) clean every single contact point in the whole set thoroughly and with the correct fluids. that means taking apart all the tuners and washing them out with electronics cleaner and then treating them with deoxit. It also means cleaning every single pot (and testing them all) and then lubing them with fader lube or something similar
3) reflow all the solder joints in the set. at the very least, reflow every single phyisical connector and large component and anything that might see heat
Once you do all that, then you can troubleshoot stuff
If you don't want to recap it first, at least do the other stuff, but recapping is going to be necessary to a large degree, so it will save you time to do it first
Of course, none of this stuff is even meaningful if the tube is too worn or the flyback is toasted, so it's all a risk, even if you can test them
Best place to start from is a set that is at least partially functional, that way you can at least know certain things work