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Technics SA-GX470 sound problem

LightninRick

LightninRick

Member
Hey all, New here. I have a Technics SA-GX470 from when it was new. The sound coming from both A and B on the right is muffled and distorted. It is not speaker as the same speaker sound is ok on the left. And there is popping out of both sides.
any help on the solution to fix would be very appreciate.
 
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Sounds like leaky transistors (or output I.C., if it has one). Most of the Technics made in that era used "power pack" I.C.s as outputs, and they tend to run $70-$90 or so. They are big plastic devices, usually gray in color, mounted to the large heatsink inside. They fail fairly often. I have replaced several. The popping noise you hear is the unit sending DC to your speakers (not good).
 
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