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reparing Receiver - TX-8511

Discussion in 'Troubleshooting and Repair' started by Xray, Jun 8, 2013.

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  1. Xray

    Xray

    2
    0
    Jun 8, 2013
    Hi

    My receiver has 2 Speakers outputs A and B.
    A speakers stopped working, so i changed to B, now it is gone too.
    I wanted to try to repair it, any one can give some help on this issue? is it an easy fix?

    thx
     
  2. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    If the A speakers worked OK, then failed and the B speakers worked for a while, it is unlikely to be a fault in the electronics.

    I would think it is a dirty switch. Spray with switch cleaner or wash with isopropyl alcohol.
     
  3. Xray

    Xray

    2
    0
    Jun 8, 2013
    it started to work again. I played with the back switch (4 - 8 ohm switch)
    once i changed it, the amp started to work again in both positions. Bizarre, how can it fix itself like that?
     
  4. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,271
    Nov 28, 2011
    Didn't you read duke37's reply?

    As he said, it could a dirty switch. Or maybe dry joints on a switch. Could be the A/B switch or the 4/8-ohm switch, or both.

    To find out which, put a continuous signal through the amp and tap or gently push each switch in various directions, to see whether one of them is intermittent.

    Or open it up, inspect for dry joints, and clean the switches as duke37 described.
     
  5. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    The technique of electronics repair is knowing just where to hit it.:):)
     
  6. davenn

    davenn Moderator

    13,785
    1,936
    Sep 5, 2009
    .... and what with ..... the good old fashion "micro-adjuster" aka a large hammer haha

    sorry, couldnt resist

    Dave
     
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