Pioneer SX-780 Output Transistors

phillyflyer

New Member
I have been listening to my sx-780 receiver when all of a sudden the output power transistors blew and now I need to replace them. My question is can only one blow and will it make both channels stop working? Or should I just replace both of them?
 
So I decided to go the default way and bought new STK's. When I opened the bottom of the receiver I noticed there was a newer STK module and what looked like the original STK module. I went ahead and replaced just the older one. Afterwards I tried powering the unit up to see if you hear that wonderful 'click' sound and I did. The receiver now performs as it should. So when one STK module goes it takes out both channels per say. I would recommend replacing one, try it and then replace the other if necessary.

Thanks again for the member input for this issue. I definetly gained some knowledge and experience through it.
 
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