Question about Sony SA-WM500 Subwoofer

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No Audio I've had this Sub for sometime. For the last year, it's sat in the corner collecting dust. I was about to buy a new one, but first I want to check and see if this one is fixable. The light on the front still lights, and still changes from red to green when audio is sent to it. I've check inside and all cables are connected. No noticable burns or broken resistors. I've even swapped out speakers, yet nothing. I've tried the mono input, and also the speaker connectors to get signal, yet nothing. Just no audio. Thanks in advance.

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  • guitar247 Sep 11, 2007

    Help me out... Where would the three pins be located

  • Beerfrogiii Apr 05, 2008

    I have a SA-WM500 and it seems to still work but cuts off seemingly for no reason at all, until recently now it does'nt push any sound i can't understand why. I made a last attempt recently and for a second or two it worked fine like it had always done. The light always stays on and reacts when the stereo is switched on. Help!!!

  • Anonymous Sep 21, 2008

    Same problem, no audio all of the sudden.



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I had a problem with no audio and I recently found the fix. When the sub still worked and you turn it on you hear one relay click and then about 5 seconds later a second relay clicks and the audio comes on. The problem I had lies with that second relay. When you take the case apart there are 4 circuit boards. The big board with the two big blue capacitors is the main board. Well next to the two blue capacitors is a blue relay. That relay had a pin that came un-soldered from the circuit board. I re-soldered that pin and the sub works just like new. If you go here you can find a free service manual that has the wiring schematics for the amp. Hope this helps!

Posted on Jul 13, 2008

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See if you have three pins... try switching on the system and touching the yellow wire and try if you can hear the woofer give a sound if it doesn't then it is gone

Posted on Sep 11, 2007

  • just take a 1.5 volt battery and touch the two wires from each speaker and it will give a pop noise.. if you hear it the system works



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