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    More fried PWM fan MOSFETs (probably)

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    • dc42undefined
      dc42 administrators
      last edited by

      Maybe you can find someone who has hot air equipment and can replace the MOSFETs for you. Is there a makerspace or hackspace near you? Which country are you in?

      Duet WiFi hardware designer and firmware engineer
      Please do not ask me for Duet support via PM or email, use the forum
      http://www.escher3d.com, https://miscsolutions.wordpress.com

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      • 1d1undefined
        1d1
        last edited by

        Yes, I apparently fried mine as well. I do get some voltage through, but only 7.75 on those that function and 0 on the others.

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        • TunnelVisionundefined
          TunnelVision
          last edited by

          @dc42:

          Maybe you can find someone who has hot air equipment and can replace the MOSFETs for you. Is there a makerspace or hackspace near you? Which country are you in?

          I'm in the UK but unfortunately don't know anyone into electronics. There is a FabLab here but they weren't keen on allowing the public in when I contacted them a while ago.

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          • dc42undefined
            dc42 administrators
            last edited by

            If you PM me later this week I may be able to help.

            Duet WiFi hardware designer and firmware engineer
            Please do not ask me for Duet support via PM or email, use the forum
            http://www.escher3d.com, https://miscsolutions.wordpress.com

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            • TunnelVisionundefined
              TunnelVision
              last edited by

              Thank you, I will do that.

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              • Cinproundefined
                Cinpro
                last edited by

                What Mosfet is a proper replacement? I can read the WK8 but not what is after it. is it uncommon for this to happen, I have around 200 hr on the board, thats it.

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                • dc42undefined
                  dc42 administrators
                  last edited by

                  https://duet3d.com/wiki/Connector_and_spare_part_numbers

                  The fan mosfet will blow if you short the corresponding output. Depending on the fan, it might also blow if you connect the fan wires the wrong way round.

                  Duet WiFi hardware designer and firmware engineer
                  Please do not ask me for Duet support via PM or email, use the forum
                  http://www.escher3d.com, https://miscsolutions.wordpress.com

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                  • Cinproundefined
                    Cinpro
                    last edited by

                    Found this with some help from Google, but no idea if its right, Google can be like WebMD you go in with a paper cut …next thing you know you're going to die.

                    https://www.digikey.com/product-detail/en/nexperia-usa-inc/PMV40UN2R/1727-1900-1-ND/5056345

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                    • Cinproundefined
                      Cinpro
                      last edited by

                      didn't see your response before I posted, thanks 😄

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                      • Willy510undefined
                        Willy510
                        last edited by

                        I also blew a couple of the fan mosfets, my fault , and was able to replace them without using a hot air station. I used a small pointy soldering tip and liquid flux and some small copper braid and no coffee before doing it. If you don't have much soldering experience I would suggest watching a few youtube videos on SMT removal without a hot air station and practicing on some junk electronics first.

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                        • TunnelVisionundefined
                          TunnelVision
                          last edited by

                          @dc42:

                          If you PM me later this week I may be able to help.

                          I sent a message (I think), hope you got it.

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