Question about Technics SA-DX940

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Hi, my technics SA-DX 940 all of a sudden started saying overload when I turn it on then says to shut off. It was running fine then one day the breaker in our house popped off. The system was not running at the time. Any ideas. Thanks.

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  • hademarre Apr 19, 2009

    Would this go out all of a sudden? And is this the only fix? Any other solutions I can try?

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Hi,
Receiver goes to protect mode and shut down when it gets problem in amplifier output section and that happens usually in front left or right channels.

Unplug receiver from AC power outlet for couple of minutes and replug back in and turn power up. Still no joy, then out put section is damaged and you need to replace defective output chip.

You can download Service Manual of SA-DX940 from Manual Zone for small fee if you wish to repair it yourself. Required parts can be obtained Part-Store.

Hit "add a comment" button for further query / info.
Thanks.

Posted on Apr 19, 2009

  • Shahid Electronics
    Shahid Electronics Apr 19, 2009

    Would this go out all of a sudden? And is this the only fix? Any other solutions I can try?
    ========================================================================

    As you know it is 5.1 channel receiver that means it has 5 amplifier sections and any of 5 got problem, protection circuit generate error signal and system control chip shut down receiver immediately to avoid further damage.

    Yes, electronic semiconductor parts can be damaged on voltage fluctuation as receiver already had power failure in house.

    I gave you one suggestion to unplug and replug unit in AC outlet, this will reset amplifier protection circuit if it has any false error signal.

    Thanks.


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