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Repaired Shear Back Stop Key Pad Enter Key not working

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    Repaired Shear Back Stop Key Pad Enter Key not working

    This was a real fun repair that I wanted to pull my hair out not that I have much hair left

    We got this hand me down Shear from one of our other location—>

    When first turn on the Shear the digital display would keep flashing the digits one at a time and the desmail point would also flash on and off

    Took out the controller boards and recap them put them back in now the digits do not flash as much but now the enter key works when it felt like working

    Took the controller boards out again and replace the MM74HC373N five of them
    One LT1013CP and four of the 2N4401

    Now every thing works the way it should work
    Attached Files
    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

    #2
    Re: Repaired Shear Back Stop Key Pad Enter Key not working

    Also the touch pad was replaced which did not change one thing about the way it was working
    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

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