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Hanmatek HM310T bench PSU - schematics wanted

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    #1

    Hanmatek HM310T bench PSU - schematics wanted

    hey there

    I picked up a faulty bench PSU that was being discarded as was faulty. So the internal SMPS has some faults, bad thermistor, Schottky rectifier and Mosfets all blown and I have replacement parts on way. fingers crossed 😀

    I am looking for a set of diagrams for the power supply. has EST v1.15 along with 2022 date. Not sure if the EST refers to Edwards or some other manufacturer.

    thanks in advance.

    D
    Tags: None
    #2
    Please post some pictures of the device in question including the pictures of both sides of the circuit board so that we can read the components print and if you can point out the parts that are bad or missing

    Comment

      #3
      Hi sam_sam_sam

      will get some pics of the device and board and share. Will take a few hours

      Cheers

      D

      Comment

        #4
        Hi

        Photos as requested:

        Front panel
        Click image for larger version Name: image.png Views: 245 Size: 756.3 KB ID: 3271751

        from the right hand side
        Click image for larger version Name: image.png Views: 253 Size: 1.27 MB ID: 3271752

        the main SMPS board is loose as the heatsink is removed with 3 faulty components...i removed to test a 470uf 50v cap but has tested OK.its removed from near top left of the board on the DC side.

        all the issues appear to be on the hot side.

        from the rear of the bench supply - 5A slo blo fuse also blown. The USB port is for programming the supply
        Click image for larger version Name: image.png Views: 242 Size: 512.0 KB ID: 3271753

        the business side of the internal SMPS

        Click image for larger version Name: image.png Views: 249 Size: 1.19 MB ID: 3271754
        Notes on the above Photo...
        Board is loose as I removed the heat sink to check 2x mosfets and the schottky rectifier - all 3 are blown.

        the smps board
        Click image for larger version Name: image.png Views: 244 Size: 1.04 MB ID: 3271755
        the faulty parts on the heat sink are

        Q9 & Q10 = cs20200CT MOSFETS
        Q8 = 13N50A Schottky Rectifier
        NTC1 = NTC20D11 Thermistor

        close up - hope it will zoom
        Click image for larger version Name: image.png Views: 253 Size: 1.81 MB ID: 3271756

        board labels

        Click image for larger version Name: image.png Views: 240 Size: 1.22 MB ID: 3271757
        Attached Files

        Comment

          #5
          all working great after replacing the blown items listed.

          Comment

            #6
            plan on re-capping it at some point,
            it's probably full of crap like chang-x instead of rubycon/panasonic

            Comment

              #7
              I plan to - gets light use as not expecting it to cope with 'marketed rating'
              cheers

              Comment

                #8
                Hello, have HM310 and HM605T. HM310 have ucontroler bad or unprogramed (STM8S00 5K6T6C). I have one HM310 with ucontroler good. Can this STM8S00 5K6T6C be copied?

                Comment

                  #9
                  STM8 needs an ST-Link programmer and some luck - it has read protection but they may not have enabled it.

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