Question about Sony STR-GA8ES Receiver
I was hooking my receiver up to two components (DVD player and DVD/VCR combo, and the TV out). I had it working perfectly, but the overall volume was lower on all channels except DVD player. I swapped cables and then noticed the right channel wasn't working properly. The left channel is fine, but the right is highly distorted and low in volume.
I tried swapping cables and inputs and disconnecting all but the one I wanted, but it stayed the same. When I swapped speakers, the problem stayed with the right channel. This occurs on every input that I try, and on both the A and B speaker outputs - always the right.
Just to make sure, I put my older receiver back in and the speakers work fine on both channels.
I had noticed that at one point I had shifted the cables so that instead of the output from the DVD/VCR going to left and right audio, one cable was on an audio and the other on composite video. I think this is what happened.
Is there a shop manual available to pinpoint the part that is bad so I can replace it? Are parts (circuit boards or board level components) available for repair? I can solder with the best of them, but need to pinpoint the problem area. A schematic and parts list would help.
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.
Posted on Feb 02, 2009
If you have checked the speakers and wiring, the right channel has a audio driver or output problem, which explains the low volume, static, and distortion. A service technician will be required to fix the receiver so it will balance the left side.
Posted on Jan 10, 2011
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