Question about Sony STR-DE445 Receiver

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Right speaker channel low, both front and and back, even the headphones

I got this reciever for free from my brother recnetly and it had been in a box for quite a while. I took it out and hooked up some speakers, and I noticed the right channel on this is super low. I tried a set of headphone to see if it were my speakers, and no fix. I swapped speakers, changed wires, and even tried to reset ( by unplugging for more than an hour) but, still it does the same. Even when I change the speaker balance to +8 on the right channel it stil does not have much sound coming out. I am guessing I need to break it open and start checking the circuits, but I don't know where to start.

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  • chris newton Jul 09, 2007

    So, I tried this, no fix. I just need to know which PCB to check I am sure there is possibly an amplifier board, but I cam not sure which one.

  • jimsplace_77 Jan 03, 2009

    i have the exact same problem did you ever find a solution i would really like to fix this it ran good for 4 years then this please help if you can



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There might be a levels adjustment in the setup menu for distance or something, might check that before opening unit up.

Posted on Jul 08, 2007

  • les lake Jul 11, 2007

    If you have low volume on one channel, but it is still working, I would suspect something in the bias circuits or preamp circuits on the main amp board, most of the better units use individual transistors for outputs, they will of course be mounted to a gigantic heat sink.



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