Atoll ST200 Amp

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  • habanerocat
    Senior Member
    • Nov 2014
    • 96
    • Ireland
    #1

    Atoll ST200 Amp

    Hi, A friend's streamer wend down after a lightening storm. It's dead. I haven't looked at it yet.
    Obviously it's probably the PSU but I'd like to get some pointers before I go at it as it's an expensive piece of kit.

    I'm not familiar with the damage lightening can do so any pointers would be gratefully received. Thanks...

    3 Photos
    Tags: None
    • habanerocat
      Senior Member
      • Nov 2014
      • 96
      • Ireland
      #2
      I've had a look at this. Both the 5VDC and 3.3VDC are sitting on about 2VDC.
      There's two L7805 regulators one has an output of 5VDC the other is very hot and has that 2VDC level on the output.

      I'd like to cut the output leg of the L7805 next to see if it's being pulled low, but I can't get in at it. So I'd have to strip out the unit and remove it from the PCB.

      My question is to ye experienced people, could the L7805 be blown or is it most likely being pulled low?
      And if so, by what, given that this unit suffered from a lightening strike?

      Thanks!

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