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Duet won't boot problem

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  • ?
    A Former User
    last edited by 16 Apr 2020, 18:52

    any guide to rework of a QNF chip will do, but you will need proper preheating as the board is 2oz copper, and has 4 layers where 3 are most ground planes.

    Part is a A4403GEUTR

    undefined 1 Reply Last reply 16 Apr 2020, 19:02 Reply Quote 0
    • ?
      A Former User @mkrsjak
      last edited by A Former User 16 Apr 2020, 18:55

      @mkrsjak said in Duet won't boot problem:

      I took a microscope and the u3 is indeed damaged.

      could be worth noting it may be covered by the manufacturers warranty if the board is less than 6 months; unless its caused by a short in wiring or other external factors.

      undefined 1 Reply Last reply 16 Apr 2020, 18:57 Reply Quote 0
      • undefined
        mkrsjak @A Former User
        last edited by 16 Apr 2020, 18:57

        @bearer The board is more than 1 year old. I thought we have EU warranty 2 years,but apparently not.

        ? 1 Reply Last reply 16 Apr 2020, 18:59 Reply Quote 0
        • ?
          A Former User @mkrsjak
          last edited by A Former User 16 Apr 2020, 18:59

          @mkrsjak said in Duet won't boot problem:

          I thought we have EU warranty 2 years

          that could be something to ask your vendor about; I would have consumer protection rights if purchased locally even if the manufacturer says 6 months but I can't speak to your local rules; and it would be a matter for the vendor, not the manufacturer.

          1 Reply Last reply Reply Quote 0
          • undefined
            mkrsjak @A Former User
            last edited by 16 Apr 2020, 19:02

            @bearer said in Duet won't boot problem:

            A4403GEUTR

            I found this one, seems to be within fast shipping reach.
            https://www.tme.eu/at/en/details/a4403geutr-t/voltage-regulators-dc-dc-circuits/allegro-microsystems/

            1 Reply Last reply Reply Quote 0
            • ?
              A Former User
              last edited by 16 Apr 2020, 19:04

              Looks like the correct one. (but you will need a hot air station, a preheater/hotplate and some good flux as well)

              undefined 2 Replies Last reply 16 Apr 2020, 19:07 Reply Quote 0
              • undefined
                mkrsjak @A Former User
                last edited by 16 Apr 2020, 19:07

                @bearer said in Duet won't boot problem:

                ut you will need a hot air station, a preheater/hotplate and some good

                Have hotair, no preheat and really doing this the first time.

                ? 1 Reply Last reply 16 Apr 2020, 19:34 Reply Quote 0
                • undefined
                  mkrsjak @A Former User
                  last edited by 16 Apr 2020, 19:10

                  @bearer are the other 2 numbers important? 4403T XXXX YYYL ? cause there are many versions with different X and Y

                  ? 1 Reply Last reply 16 Apr 2020, 19:37 Reply Quote 0
                  • undefined
                    T3P3Tony administrators
                    last edited by T3P3Tony 16 Apr 2020, 19:15

                    @mkrsjak said in Duet won't boot problem:

                    4403T XXXX YYYL

                    The A4403 datasheet is here:https://www.allegromicro.com/~/media/Files/Datasheets/A4403-Datasheet.ashx

                    ;
                    The part numbering specifically
                    ecff334d-3018-4d61-adde-bbf116ce1e59-image.png

                    www.duet3d.com

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      mkrsjak
                      last edited by 16 Apr 2020, 19:18

                      ok, will buy and hopefully fix it, will post the result. thank you all for the outstanding help!

                      1 Reply Last reply Reply Quote 0
                      • ?
                        A Former User @mkrsjak
                        last edited by A Former User 16 Apr 2020, 19:34

                        @mkrsjak said in Duet won't boot problem:

                        no preheat and really doing this the first time.

                        just be carefull with the surrounding parts, shield with kapton or alu tape (don't take the paper backing off the alu tape, it makes a mess (when very hot))

                        1 Reply Last reply Reply Quote 0
                        • ?
                          A Former User @mkrsjak
                          last edited by A Former User 16 Apr 2020, 19:37

                          @mkrsjak said in Duet won't boot problem:

                          are the other 2 numbers important?

                          to add on Tonys reply; usually the last few numbers/letters refer to packageing, both in terms of which package it is (qnf, qft, bga sop etc) and how its packaged, tape, tray, tube etc; and the details are usually in the datasheets. (I posted the variant that is commonly available as "cut tape" in low quantity)

                          1 Reply Last reply Reply Quote 0
                          • undefined
                            mkrsjak
                            last edited by 21 Apr 2020, 18:49

                            @bearer said in Duet won't boot problem:

                            QNF

                            I was something else wrong with the board. The U3 gets fried again, even with no connections except the power IN.
                            I will buy a replacement, but really not see a point buy from duet with only 6months of warranty. This should be fixed in general.
                            Even shoes and heavily wearing products have 2 years. Shame.

                            1 Reply Last reply Reply Quote 0
                            • undefined
                              Phaedrux Moderator
                              last edited by 21 Apr 2020, 22:09

                              Sorry to hear you've had an unfortunate hardware failure and were unable to resolve it. The warranty provided can be reviewed here: https://www.duet3d.com/warranty

                              Unfortunately you're out of the warranty period it would seem. However, we may be able to provide you with a refurbished board at a reduced price on exchange. Please contact roland@duet3d.com to inquire about current availability.

                              Z-Bot CoreXY Build | Thingiverse Profile

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