Technics SA-202 Stereo Receiver issues

[vortalexfan]

Originally Posted by Celt

Leaky caps can most assuredly cause all sorts of problems.

OK, that's what I thought, I'll see if I can get another one ordered to replace the one that's problematic in the circuit, and see where that takes us with this stereo receiver.
I downloaded the service manual and the owners manual from HiFi Engine.
I looked up the part C622 but I wasn't able to find out what exactly that part did in the amplifier circuit, but I'm pretty sure that's the cause of the blowing fuses in the Right channel speaker protector fuse block.

[vortalexfan]

So I replaced C622 (I happened to have a capacitor rolling around in my parts stash for that value) but its still blowing fuses, so I'm thinking it may very well be a bad STK0029 chip after all, of course I wouldn't be too surprised if that bad capacitor that was in there wasn't responsible for taking that STK chip out in the first place.

Anyways looking on ebay I found several sellers on there that seemed like they were selling non-knockoff STK0029 chips on there for prices between $7.99 and $20 so I may check into one of those.

The nice part is that on this stereo they only utilize six of the 10 pins of the STK Chips so it will be fairly easy to get it out of there and replace it.

EDIT: Was doing some voltage checks on the STK chips and the one for the right channel had the two inner most pins that are utilized pins 3 and 8 measured 0 volts on them which I take means its shorted.

So I'll be ordering an STK0029 chip from eBay to replace the bad one, unless someone has a good reputable supplier that they've used in the past that they would like to recommend to me to use to source a new STK0029 Chip from.

[zeno]

Of interest
https://www.youtube.com/watch?v=EZJjqpDaSZs
He also has other great videos.

73 Zeno
LFOD !