Power supply board from a ventilation unit - burnt out something

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  • cjard
    Member
    • May 2014
    • 14
    • US
    #1

    Power supply board from a ventilation unit - burnt out something

    This vent axia ventilation unit stopped working and I pulled the power supply board hoping it was the internal fuse. Seems this other component might be to blame but what is it? It looks like a capacitor to me but next to it on the board is printed RV1 whereas a physically similar component at the other side of the board is labelled C15...

    Any ideas guys?
    Attached Files
    Last edited by cjard; 10-20-2019, 10:57 AM.
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30931
      • Albion
      #2
      Re: Power supply board from a ventilation unit - burnt out something

      the big cap in the picture looks bulged.

      the device may be a resistor to limit inrush - have you checked for shorts?

        Comment

        • petehall347
          Badcaps Legend
          • Jan 2015
          • 4423
          • United Kingdom
          #3
          Re: Power supply board from a ventilation unit - burnt out something

          looks like a stand in for lack of a fuse . guessing there is a short after it

            Comment

            • R_J
              Badcaps Legend
              • Jun 2012
              • 9515
              • Canada
              #4
              Re: Power supply board from a ventilation unit - burnt out something

              Check if RV1 is inline with the a/c line or is across the a/c between line and neutral, It could be a inrush ntc thermistor if in line or a MOV if it is across the line, clean it off, you might see a number on it.

                Comment

                • cjard
                  Member
                  • May 2014
                  • 14
                  • US
                  #5
                  Re: Power supply board from a ventilation unit - burnt out something

                  My neighbor has the same device as I pulled this board from, so I'm gonna take a look at the components and see if I can see anything on them, writing wise

                    Comment

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