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350P, replaced/repaired 3 boards still 0 arc voltage

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  • #1

    350P, replaced/repaired 3 boards still 0 arc voltage

    Was told by a service tech to replace the user interface board. It came with the pulse board also, so I changed them both and no change,wire feeds...3 seconds and 0 arc voltage (HELP 3). Call Miller, get put through to the gentleman who is the 350 guy...even though im not a tech he agrees to walk me throught the test procedure for the main power board and IGBT's..we do all this and all checks good. He says if I have already changed user interface and Pulse boards and bottom end checks good it can only be the only board left. I send that board out for repair (free quote) they say there was damaged parts and are replaced. install board and well i think you know where this is heading...same fault. almost 2k$ into "repairs"....any help..ideas? wanna buy a Python gun and a bunch of new boards
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  • #2
    Have you called Miller factory tech support ......... ???

    920-735-4356 or 1-800-4-A-Miller (1-800-426-4553).
    .

    *******************************************
    The more you know, The better you know, How little you know

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

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    • #3
      just called again,walked through some stuff. same as before, nothing seems wrong. Does anyone have one of these machine and willing to check something for me??

      machine opened up..PC1 board is the only board sitting vertically in the middle of the machine. on top left of this board is a small white twisted pair of wires that goes to an thermistor on side of cooling tunnel. there is another for the other side below it with a three wire plug but only the 2 again. If i unplug either of these with the machine on, i get an "over temp" message on the front screens...but my fan does NOT turn on. if someone is willing to verify this is as i suspect NOT normal...it would verify I still have a problem with this board

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      • #4
        Originally posted by quaddamg View Post
        just called again,walked through some stuff. same as before, nothing seems wrong. Does anyone have one of these machine and willing to check something for me??

        machine opened up..PC1 board is the only board sitting vertically in the middle of the machine. on top left of this board is a small white twisted pair of wires that goes to an thermistor on side of cooling tunnel. there is another for the other side below it with a three wire plug but only the 2 again. If i unplug either of these with the machine on, i get an "over temp" message on the front screens...but my fan does NOT turn on. if someone is willing to verify this is as i suspect NOT normal...it would verify I still have a problem with this board
        why not go through that with the Miller Tech....???
        .

        *******************************************
        The more you know, The better you know, How little you know

        “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

        Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

        My Blue Stuff:
        Dynasty 350DX Tigrunner
        Dynasty 200DX
        Millermatic 350P w/25ft Alumapro & 30A
        Millermatic 200

        TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

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        • #5
          I asked and he was unsure

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          • #6
            To clarify, does the wire attempt to feed as soon as the machine power is turned on?

            If yes, have you checked for a shorted (closed) gun trigger switch? HELP 3 also indicates the gun trigger switch is closed when the machine is powered on.
            MM200 w/spot controller and Spoolmatic 1
            Syncrowave 180 SD
            Bobcat 225G Plus LPG/NG w/14-pin*
            *Homemade Suitcase Wire Feeder
            *HF-251D-1
            *WC-1S & Spoolmatic 1
            PakMaster 100XL
            Marquette "Star Jet" 21-110
            http://www.millerwelds.com/images/sm...rolleyes.png?2

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            • #7
              no, the gun only feeds when trigger is depressed

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              • #8
                Anyone? willing to give the above a check for me...it's a $1000 board, i just want to verify its what i need as no one is able to pinpoint it

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