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    i think fan0 mosfed died.

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    • A Former User?
      A Former User @weput
      last edited by

      @weput said in i think fan0 mosfed died.:

      fan2 doesnt. ;(

      did the circled area clean up on TR1? if not it might need replacing as well. given fan 1 works, you might get away with new fets.
      bb3e4e16-3055-40b7-91d2-0d45ff972c59-image.png

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      • dc42undefined
        dc42 administrators
        last edited by dc42

        PS - I just found that old thread, https://forum.duet3d.com/post/34904. Relevant if your Duet doesn't have any blade fuses.

        EDIT: but if fan 1 works, that trace must be OK.

        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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        • weputundefined
          weput @dc42
          last edited by

          @dc42 ok dumb question:

          how do i know if my duet has blade fuses?

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          • A Former User?
            A Former User
            last edited by

            ce502585-16e1-4f51-94d6-f0c75af03b7b-image.png

            if you can't see them, they're probably not there

            weputundefined 1 Reply Last reply Reply Quote 0
            • dc42undefined
              dc42 administrators
              last edited by

              Check the PCB version marked on it. Version 1.03 was the first version with a fan fuse.

              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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              • weputundefined
                weput @A Former User
                last edited by

                @bearer this one definitely don't have.

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                • A Former User?
                  A Former User @weput
                  last edited by

                  @weput the fuse is likely less important as long as Fan 1 works. But do take a closer look at TR1 after the clean up as indicated above.

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                  • weputundefined
                    weput @A Former User
                    last edited by

                    @bearer said in i think fan0 mosfed died.:

                    it look fine.... but fan2 still doesn't move.

                    20200526_153543.jpg
                    20200526_153641.jpg

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                    • A Former User?
                      A Former User @weput
                      last edited by

                      @weput said in i think fan0 mosfed died.:

                      it look fine

                      i'd beg to differ, looks like a tiny hole in it, and given the other symptoms odds are it has failed, just less spectacularly.

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                      • weputundefined
                        weput
                        last edited by weput

                        well...

                        maybe is time to think on a newer duet?

                        fan1 had the heatsink fan on.. thermostatically controlled. Maybe that's why i didnt blew.

                        fan2 had nothing on it.

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                        • dc42undefined
                          dc42 administrators
                          last edited by dc42

                          Please clarify: does just fan 1 work, or do no fans work (which is what you said in your original post)?

                          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

                          weputundefined 1 Reply Last reply Reply Quote 0
                          • weputundefined
                            weput @dc42
                            last edited by

                            @dc42 said in i think fan0 mosfed died.:

                            does

                            FAN1 works. (currently set as tool 0 fan.)
                            FAN2 doesn't.
                            FAN0 is blown.

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                            • weputundefined
                              weput
                              last edited by

                              i just realized i wrote mosfed instead of mosfet.

                              (facepalm)

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                              • dc42undefined
                                dc42 administrators
                                last edited by

                                OK, so you have 2 failed mosfets.

                                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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                                • weputundefined
                                  weput
                                  last edited by

                                  FYI guys...

                                  i managed to make fan2 work.. but somehow fan0 aint doing it...

                                  also, when i was about to solder the self resetting fuse (vssa), after removing the soldered wire for the temporary pot... i checked continuity and it had continuity... so the old fuse was working.

                                  yeah... very strange.

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                                  • A Former User?
                                    A Former User @weput
                                    last edited by

                                    @weput said in i think fan0 mosfed died.:

                                    so the old fuse was working

                                    i think i've seen dc42 suggest waitng a day or two to see if the self resetting fuse recovers - but i though you had trouble with the fans, not the VSSA fuse that is for the thermistor ground connection?

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                                    • weputundefined
                                      weput
                                      last edited by

                                      trouble with both.

                                      i received the package (finally) with the spare parts.

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                                      • weputundefined
                                        weput
                                        last edited by

                                        my board is hardware version 1, so this is not a self reset fuse...

                                        on the fan1 blown transistor,.. it seems i fucked up the board when cleaning/removing the old part.

                                        😞
                                        20200616_144136.jpg

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                                        • A Former User?
                                          A Former User @weput
                                          last edited by A Former User

                                          @weput said in i think fan0 mosfed died.:

                                          it seems i f***ed up the board when cleaning/removing the old part.

                                          these things happen with too much heat, the copper becomes delaminated from the substrate.

                                          not the end of the world, we have all the files we need to find a workaround, the missing pad is a ground connection, so you could solder in the mosfet, and run a wire from the leg with no pad to any other ground pin

                                          37f385de-87d2-4d60-b660-ec171d403ce5-image.png
                                          (edit: fixed silkscreen on top of screenshot)

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                                          • weputundefined
                                            weput
                                            last edited by

                                            thanks m8.

                                            I was looking at the old pictures and notice the cooper was conected to the pin path... so i tried to add more thin until it made contact..

                                            not sure if it worked... im connecting the board now.

                                            A Former User? 1 Reply Last reply Reply Quote 0
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