Question about Dell ADA745 Computer Speakers

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Problem with Dell AX510 Soundbar

I installed a brand new Dell AX510 sound bar on my flat panel monitor. I get no sound. Everything is plugged in...i doublecheced to be sure all mutes are off...there is a soundcard....what gives?

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  • Michel Savard
    Michel Savard Apr 10, 2015

    I have quite of few of those that the speakers do not work, they are stuck into mute from the small board where the headphone jacks plug into.

  • Michel Savard
    Michel Savard Apr 10, 2015

    Basically, it send a +6 Volts out to the amplifier board inside to mute the speakers while the headphones are in.

  • Michel Savard
    Michel Savard Apr 10, 2015

    If you leave the headphones in for a long time there are 2 transistors that control that signal, +6 = mute +12= unmuted

  • Michel Savard
    Michel Savard Apr 10, 2015

    There is a 20K resistor from +12V to the pin of the mute signal going to the main board.

  • Michel Savard
    Michel Savard Apr 10, 2015

    If you add a 20K resistor to that pin and the other end to the switched side of the headphone jacks (the one that would go to the transistor), you will get a muted +6 volts out when headphones are plugged in and +12 V unmuted when headphones out

  • Michel Savard
    Michel Savard Apr 10, 2015

    That is probably the easiest fix or else just remove the transistors and leave it unmuted all the time.

  • Michel Savard
    Michel Savard Apr 10, 2015

    The amplifiers with 2 heatsinks are TDA1517, that is how I figured out the mute signal.

  • Michel Savard
    Michel Savard Apr 10, 2015

    Not sure what these folks are talking about bios drivers etc, problem is simply with speaker bar???

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In order for your sound to work you have to disable the on board sound in the bios . unless you already did the , then i would return it and get a different one.

Posted on Apr 20, 2009

  • Michel Savard
    Michel Savard Apr 10, 2015

    I have anumber those going bad, there are 2 small transistors on the small board where the headphones plug into.

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