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I have a technics su-v660 integrated amplifier.the voltage selector light comes on but the current drive light is intermittent .when the red drive light is on it works perfectly but only for 5 minutes then it gives an unbearably high feedback type squeal and off goes the red light but it still has power as the amber light keeps workingjust no sound unti current drive light decides to work again which is usually next day. There is no smell or heat problem.the current drive light goes out even with no speakers connected.its a really old amp but i would love to save it.

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  • Master
  • 1,851 Answers

Unplug the power, open the case and try to locate some electrolytic capasitors is series with the audio at the channel with the problem. One of them must be blown.

In case of a problem or clarification, don't hesitate to post me a reply.
If you are satisfied, rate my solution with the "thumbs".

Thanks and regards
Please kindly rate this solution
Stelios
direct FixYa link: http://www.fixya.com/users/technical114

Posted on May 11, 2010

  • Stelios
    Stelios May 11, 2010

    Sorry for my previous post, as you can imagine it's not your case. I'll be back soon.



  • Stelios
    Stelios May 11, 2010

    As your amplifier is indeed a very good one, I suggest you to keep trying to fix it. All the symptoms that you refer are at the power supply device, maybe the transformer is partly blown out. Before attempting to get it at a technician, unplug the power and unscrew the cover. At the front right side (just behind the power switch) you will see a pcb with one capacitor, one resistor and one fuse (glass type). Check and replace the fuse if it is faulty. I can suggest you checking the connections at the pcb itself, but it is not so easy if you are not familiar. Here is a photo of what I'm talking to.


    Sorry again for my first post.
    In case of a problem or clarification, don't hesitate to post me a reply.
    If you are satisfied, rate my solution with the "thumbs".

    Thanks and regards
    Please kindly rate this solution
    Stelios
    direct FixYa link:http://www.fixya.com/users/technical114

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dunnbiker
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SOURCE: i have a technics su-v660 integrated amplifier.the

Thgis sounds like a problem that is beyomd the scope of remote diagnosis. Perhaps a trip to a tech would help the patient.

Posted on Mar 17, 2010

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I have a technics su-v660 integrated amplifier.the voltage selector light comes on but the current drive light is intermittent .when the red drive light is on it works PERFECTLY but only for 5 minutes then...


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Hope this helps.

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