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    12V on the 5V rail

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    Duet Hardware and wiring
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    • Haggan90undefined
      Haggan90 @dc42
      last edited by

      @dc42 You mean the U11 / 74HCT02?

      dc42undefined 1 Reply Last reply Reply Quote 0
      • dc42undefined
        dc42 administrators @Haggan90
        last edited by

        @Haggan90 said in 12V on the 5V rail:

        @dc42 You mean the U11 / 74HCT02?

        Yes.

        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

        Haggan90undefined 2 Replies Last reply Reply Quote 0
        • Haggan90undefined
          Haggan90 @dc42
          last edited by

          @dc42 aha ok! I have to do that at work where we have a hot air solder gun

          1 Reply Last reply Reply Quote 0
          • Haggan90undefined
            Haggan90 @dc42
            last edited by

            @dc42 Hi!

            Sorry for taking such long time for this, but now I have manage to replace the U2 and U11.
            When I connect the Duet to USB I get a warning of high current cunsumtion on the USB port, and U2 get's really hot.

            Do you have any slightest idea of what else could be broken?

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            • dc42undefined
              dc42 administrators
              last edited by dc42

              What else is getting hot? Start by checking the processor, SD card (if it is in the socket), and WiFi module.

              Are you certain that you used the correct chip to replace U2? Different hardware versions of the Duet WiFi use different chips in that position.

              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

              Haggan90undefined 1 Reply Last reply Reply Quote 0
              • Haggan90undefined
                Haggan90 @dc42
                last edited by

                @dc42 hi!
                As far as I can nothing else get's hit then the U2. Here are the new components.
                2020-4-26 10-27-58.jpg 2020-4-26 10-28-13.jpg

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                • dc42undefined
                  dc42 administrators
                  last edited by

                  What part number did you use for the 3.3V regulator, and what hardware revision Duet board is it? I think you may have used the wrong regulator.

                  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

                  Haggan90undefined 1 Reply Last reply Reply Quote 0
                  • Haggan90undefined
                    Haggan90 @dc42
                    last edited by

                    @dc42 Hi,

                    As voltage regulator I used a: AP7361C-33E-13
                    And as the U11 mosfet driver I used a : SN74HCT02PWR

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

                      looks like the board is a revision 1.03 board that uses a TC2117 which is not compatible with AP7361C-33E-13 but should could be compatible with AP7361C-33ER-13

                      9c692d57-91d2-49a8-bcac-d17ca85f8087-image.png

                      Haggan90undefined A Former User? 2 Replies Last reply Reply Quote 0
                      • Haggan90undefined
                        Haggan90 @A Former User
                        last edited by

                        @bearer Aw crap haha 😛
                        Might I have destroyed the PCB even more now?

                        A Former User? 1 Reply Last reply Reply Quote 0
                        • A Former User?
                          A Former User @Haggan90
                          last edited by

                          @Haggan90 not sure; i would guess u2 took the blunt of the force this time as well.

                          you'll just have to remove it and see if the board still works with external 3.3v I guess (or wait for the correct part)

                          But do double check it is a rev 1.03 board

                          Haggan90undefined 1 Reply Last reply Reply Quote 1
                          • Haggan90undefined
                            Haggan90 @A Former User
                            last edited by

                            @bearer Ok!
                            Yeah, It is a V1.03 board.
                            Is it possible that the Wifi Module and the SD card reader is OK or do I have to change one/both of them as well?

                            A Former User? 1 Reply Last reply Reply Quote 0
                            • A Former User?
                              A Former User @Haggan90
                              last edited by

                              @Haggan90 as I said I'm not sure, head isn't quite on the right way but I'm guessing you essentially fed -5v into the 3.3v output of the regulator which it didn't like.

                              odds are if nothing else got warm the damage is contained, but as i said, remove the wrong regulator and test it with an external supply and you'll have the answer.

                              1 Reply Last reply Reply Quote 0
                              • A Former User?
                                A Former User @A Former User
                                last edited by

                                @bearer said in 12V on the 5V rail:

                                but should be compatible with AP7361C-33ER-13

                                @Haggan90 just clicked in my head the AP7361C doesn't specify if the tab is connected to v-out or gnd or anything at all; so I can't say for sure if it works.

                                TC2117-3.3VDBTR is the full partno from the 1.03 schematic.

                                Haggan90undefined 1 Reply Last reply Reply Quote 0
                                • Haggan90undefined
                                  Haggan90 @A Former User
                                  last edited by Haggan90

                                  @bearer said in 12V on the 5V rail:

                                  TC2117-3.3VDBTR

                                  TC2117.PNG

                                  IS this the correct one?
                                  https://www.digikey.se/product-detail/sv/microchip-technology/TC2117-3-3VDBTR/TC2117-3-3VDBCT-ND/7065613

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

                                    has the same manufacturer part number as on the schematic at least, so thats about as sure as I can get.

                                    "Tillverkarens artikelnummer TC2117-3.3VDBTR"

                                    (the key to decoding the part numbers are usually towards the end of the datasheets, helps decode the various letters and numbers)

                                    Haggan90undefined 1 Reply Last reply Reply Quote 0
                                    • Haggan90undefined
                                      Haggan90 @A Former User
                                      last edited by

                                      @bearer Hi!

                                      I have now changed the U2 and I can connect to the board via USB 😃
                                      It seems like maybe the WiFi module is broken, but is there any way I can check that over YAT?

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                                      • A Former User?
                                        A Former User
                                        last edited by

                                        just follow the getting started guide to set up wifi again, if it responds to M552 and connects you're good.

                                        Haggan90undefined 1 Reply Last reply Reply Quote 0
                                        • Haggan90undefined
                                          Haggan90 @A Former User
                                          last edited by

                                          @bearer ok!
                                          The blue LED does not light up on start, is that a bad thing?

                                          Haggan90undefined 1 Reply Last reply Reply Quote 0
                                          • Haggan90undefined
                                            Haggan90 @Haggan90
                                            last edited by

                                            @Haggan90
                                            Ok, it seems like I can't get the Wifi module into idle mode.
                                            Also, I do belive it get's a bit warm, not hot but warm.

                                            M115
                                            FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 2.05.1 ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2020-02-09b1<LF>ok<LF>
                                            M552 S-1
                                            WiFi module stopped<LF>ok<LF>
                                            M552 
                                            WiFi module is disabled<LF>ok<LF>
                                            M552 S0
                                            ok<LF>
                                            M552
                                            WiFi module is being started<LF>ok<LF>
                                            M552 S0
                                            ok<LF>
                                            M552 S0
                                            ok<LF>
                                            M552
                                            WiFi module is being started<LF>ok<LF>
                                            M587
                                            M587: Failed to retrieve network list<LF>ok<LF>
                                            
                                            Phaedruxundefined 1 Reply Last reply Reply Quote 0
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