Trying to diagnose possible PSU issue with my coffee machine

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  • jimxms
    New Member
    • Oct 2015
    • 2
    • UK
    #1

    Trying to diagnose possible PSU issue with my coffee machine

    Hi all,

    I've got an integrated coffee machine which stopped powering on yesterday. Prior to this it would sporadically switch its self off and sometimes would just have flickering LED lights on the front of the machine.

    When I plug in the machine now I can hear a high pitched chirping noise coming from the PSU area. I have recorded it and uploaded it here: https://instaud.io/cSe

    I have taken the coffee machine apart and cannot se any obviously bulging capacitors, but could the noise still be a sign of a bad cap?

    Here is the main PCB:















    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 31011
      • Albion
      #2
      Re: Trying to diagnose possible PSU issue with my coffee machine

      sounds like a bad small cap, or a short circuit on the psu output.
      the small ones wont bulge or leak when they fail - you need an esr meter or just change them.

        Comment

        • orgwood
          Member
          • Apr 2013
          • 39
          • USA
          #3
          Re: Trying to diagnose possible PSU issue with my coffee machine

          My Gevalia coffee maker with clock/timer literally blew up and caught fire. Luckily I was in the room when it happened and quickly removed it to where I could put out the small fire from the plastic. There was hardly anything left to examine but I suspect it was a bad SMPS with a bad cap.

            Comment

            • mmartell
              Badcaps Legend
              • Oct 2013
              • 3189
              • Canada
              #4
              Re: Trying to diagnose possible PSU issue with my coffee machine

              Umm dude you should report that. There could be a serious hazard to owners of that unit that wouldn't be aware of it.

                Comment

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