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Panasonic SA-AK520

Discussion in 'Troubleshooting and Repair' started by C.J., Sep 28, 2015.

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  1. C.J.


    Sep 28, 2015
    I have a Panasonic SA-AK520 that the audio cuts out at high volume.Only the sub-woofer works.If you turn it off and back on it works fine until you raise the volume.
  2. Martaine2005


    May 12, 2015
    HI C.J
    Are you using the original 6Ω speakers for the unit?

  3. 73's de Edd

    73's de Edd

    Aug 21, 2015

    Sir C.J. . . . . .

    Well . . . . . in making these initial observations . . . . . the back cover on one of those units lists up to max potential 270 watts of max power consumption for on one of those units.

    Plus the list price seems to be up un the 500 hunna dollar category, so this unt would be more than a glorified shoulder toted "Boom Box".

    So it looks like your woofers amp can handle it, but the other set of R and L amps and power audio drive to their speakers is failing.

    Initially, if only affecting ONE channel, one would possibly want to expect a speaker voice coil problem BUT this would NOT be the case with BOTH speakers cutting out.
    (Do check the interconnecting wiring integrity to those speakers. )

    So one major point of further interest in trouble analysis would be if the unit was initially started stone cold and the volume upped, does that cut out occur ?

    AND if that situation is being true, is it true on ALL all of your audio input mode sources ? ? ?

    The other possibility is that this situation is only occurring AFTER the unit has initially played for awhile, and its power amp components have then started thermally warming up.
    Then, that is when the unit would fail, AFTER the volume was then advanced up.

    Can you tell us if that is being true ?

    If the latter is the case come back for feed back on further analysis , if the first situation consult a Swami.

    PLUS . . . . . additionally to Sir Martaines query, above . . . . . Are any other R and L supplemental speakers
    being " haywired " into the system?

    73's de Edd

  4. shrtrnd


    Jan 15, 2010
    My line of thought is along that of Martaine2005's
    Your amp is cutting-out in self-protect mode.
    Either your speakers are the problem, or possibly a problem with the connections to them.
    Check your wires to see if there are any bad connections.
    If this keeps up, if you have speaker output fuses in your amp, you'e going to blow them, or you're going to damage the speakers or the amp.
    Or, you can keep the volume turned down.
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