Question about Sony STR-DE485 Receiver

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Fuzzy sound from right front speaker output

Happened suddenly one day - the right speaker output is distorted - swapped speakers and wiring and it is definately the positive output for the right side. No obvious issues noted when looking at the solder points on any of the boards. Anything simple to check and/or replace?

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  • Anonymous Mar 16, 2009

    I have the same issue with my left speaker. One day I got nothing but crackling from that channel. I checked the wire and speaker with another channel and everything was fine. Definitely an internal problem.

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The main issue is to determine where the distortion is coming from. Does it start in the front and and get amplified or does it appear in the output section only? This will require a fixed signal and an oscilloscope to trace. Check for leaky coupling caps or leaky transistors in at the diff-amp section.

Dan

Posted on Feb 02, 2009

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