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Powered speaker is noisy when turning on.

Discussion in 'Troubleshooting and Repair' started by Felix, Nov 25, 2012.

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  1. Felix

    Felix

    3
    0
    Nov 25, 2012
    Hello,

    I have a set of M-Audio BX5a powered studio monitors. When one of them is powered on, a loud buzz is heard that gets progressively louder. Can someone help diagnose what the possible problem may be?

    Thanks!
     
  2. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    Electrolytic power supply capacitors?
    Circuit board pictures please.
     
  3. Felix

    Felix

    3
    0
    Nov 25, 2012
    Thank you for the reply. I've attached a couple of pics of the circuit board. As more diagnostic info, there is a loud click when turning it on and off.
     

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  4. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    Is it my imagination or is the top of the upper large electrolytic domed?
    If so, I would change both big ones.

    Others can perhaps see better than me.
     
  5. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Certainly looks that way, and certainly a good starting point to swap them out...
     
  6. Felix

    Felix

    3
    0
    Nov 25, 2012
    Yes, the top of one of them is domed. I'll start there.

    Thanks again!
     
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