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all fans don't work

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  • undefined
    massimilianoconti
    last edited by 15 Apr 2020, 19:59

    all fans don't work

    hi I have encountered this problem: at some point fan0 fan 1 have stopped working and today even the two fans that are always on no longer work. is it a card defect? initially for a while everything worked well the card is new

    ? 1 Reply Last reply 15 Apr 2020, 20:02 Reply Quote 0
    • ?
      A Former User @massimilianoconti
      last edited by 15 Apr 2020, 20:02

      @massimilianoconti said in all fans don't work:

      two fans that are always on no longer work.

      always on fans will work as long as the fuse F2 is ok and the jumper J3 selecting the voltage is set, so check those.

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      • undefined
        massimilianoconti
        last edited by 15 Apr 2020, 20:08

        fatto รจ Hello. already done everything is connected well and the fuse is working

        undefined 1 Reply Last reply 15 Apr 2020, 20:30 Reply Quote 0
        • ?
          A Former User
          last edited by 15 Apr 2020, 20:10

          If the always on fan does not work, and the fuse F2 is ok, and the voltage selection jumper J3 is set then only two options
          - fan is broken (more likely)
          - board is broken (should be easy to see burned section on board)

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          • undefined
            massimilianoconti
            last edited by 15 Apr 2020, 20:17

            fan duet.jpg

            I also tried with other fans I attach a photo of the card

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            • undefined
              Phaedrux Moderator
              last edited by 15 Apr 2020, 20:28

              Can you get a better photo of the mosfet TR5 beside the fan jumper? It looks possibly damaged.

              Z-Bot CoreXY Build | Thingiverse Profile

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              • ?
                A Former User
                last edited by 15 Apr 2020, 20:29

                Looks like TR5 that controls Fan0 might be blown, but there is nothing but J3 and copper traces between the always on fans and Vin so the always on fans should work even if Fan0 does not.

                Unless you can use a multimeter to measure continuity from Vin to Vfan I don't think I have more to add.

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                • undefined
                  Phaedrux Moderator @massimilianoconti
                  last edited by 15 Apr 2020, 20:30

                  @massimilianoconti said in all fans don't work:

                  the fuse is working

                  How did you verify that the fuse is still intact?

                  Z-Bot CoreXY Build | Thingiverse Profile

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                  • undefined
                    massimilianoconti
                    last edited by 15 Apr 2020, 20:35

                    with tester I checked continuity and everything seems ok. I attach the photo I believe tr5 broken. I don't know how it is possible. however no fan works
                    fan duet 2.jpg

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                    • undefined
                      massimilianoconti
                      last edited by 15 Apr 2020, 20:48

                      I can't say more than that. I know that everything has gone well to date, it didn't take this problem, it forces me to replace the whole board I think. without fans no one can go.

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                      • ?
                        A Former User
                        last edited by A Former User 15 Apr 2020, 20:55

                        Try measuring as indicated, should beep or measure close to 0 ohm in all cases.
                        2020-04-15 22_49_37-Clipboard.jpg

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                        • undefined
                          massimilianoconti
                          last edited by 15 Apr 2020, 21:03

                          there is continuity between the jumper and fan bridge and fuse. the size of the tr5 I did not understand how to do it

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                          • undefined
                            massimilianoconti
                            last edited by 15 Apr 2020, 21:07

                            I had seen badly I checked everything also the continuity between resistance and fan and power supply all ok

                            ? 1 Reply Last reply 15 Apr 2020, 21:11 Reply Quote 0
                            • ?
                              A Former User @massimilianoconti
                              last edited by A Former User 15 Apr 2020, 21:11

                              @massimilianoconti said in all fans don't work:

                              all ok

                              if you the connect a fan to the always on ports and it doesn't work, then the fan (or power supply is broken)

                              To check mosfet TR5 you can mesure from Vfan- and GND like shown (use diode test --|>|--)
                              2020-04-15 23_10_53-2020-04-15 22_49_37-Clipboard_mosfet_tr5.jpg

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                              • undefined
                                massimilianoconti
                                last edited by 15 Apr 2020, 21:22

                                the voltage is not zero, it marks a value

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                                • ?
                                  A Former User
                                  last edited by 15 Apr 2020, 21:25

                                  I'm sure it won't kill you to be specific, about both measurements, need to reverse polarity and repeat measurement.

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                                  • undefined
                                    massimilianoconti
                                    last edited by 15 Apr 2020, 21:46

                                    I see + 0.3 v and -0.3 v

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                                    • ?
                                      A Former User
                                      last edited by 15 Apr 2020, 22:20

                                      Negative reading on a diode test, and fans that dont work when they should. I think you need an excorcist, or maybe some pictures showing measurement and meter.

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