hi
ill try to explain best i can
i have this old fisher studio standard home stereo system that has CA-39 Amplifier
it has worked fine ever since i bought it back in early 1980s
however, i have had it my garage as a garage sound system for about 15years...last time i used was about 5 years ago..today i decided to change out the speakers with some better speakers so i connected the speakers. left side works fine but for some reason the right side speaker was not working and was making a loud humming sound..then stopped....found out a fuse on amplifier board blew..so i replaced it and same thing happened..fuse blew...i tried this with orig speakers and the new set...and same result.
left channel works fine..right channel no work
also during hooking up the speaker wires today i did touch R channel + and - speaker wires by accident 2 times..and they sparked pretty good..not sure if this is relevant
anyways..i did notice on the board above the large stk chip one of the small caps is leaking bad.....and its a fresh leak..very liquidy...if u look at the 2nd pic you can see the leak all over the cap legs...
here are some pics
not sure if the capacitor was the root cause issue or the capacitor was damaged due to another reason...the Large IC is STK 4191 II
hoping someone can guide me to repair..
ill try to explain best i can
i have this old fisher studio standard home stereo system that has CA-39 Amplifier
it has worked fine ever since i bought it back in early 1980s
however, i have had it my garage as a garage sound system for about 15years...last time i used was about 5 years ago..today i decided to change out the speakers with some better speakers so i connected the speakers. left side works fine but for some reason the right side speaker was not working and was making a loud humming sound..then stopped....found out a fuse on amplifier board blew..so i replaced it and same thing happened..fuse blew...i tried this with orig speakers and the new set...and same result.
left channel works fine..right channel no work
also during hooking up the speaker wires today i did touch R channel + and - speaker wires by accident 2 times..and they sparked pretty good..not sure if this is relevant
anyways..i did notice on the board above the large stk chip one of the small caps is leaking bad.....and its a fresh leak..very liquidy...if u look at the 2nd pic you can see the leak all over the cap legs...
here are some pics
not sure if the capacitor was the root cause issue or the capacitor was damaged due to another reason...the Large IC is STK 4191 II
hoping someone can guide me to repair..
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