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Hanmatek HM310T bench PSU - schematics wanted

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    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

    #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
    9 PC LCD Monitor
    6 LCD Flat Screen TV
    30 Desk Top Switching Power Supply
    10 Battery Charger Switching Power Supply for Power Tool
    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
    25 Servo Drives 220/460 3 Phase
    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

    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

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        from the right hand side
        Click image for larger version

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        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

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        the business side of the internal SMPS

        Click image for larger version

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        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

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        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

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        board labels

        Click image for larger version

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        Attached Files

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