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  1. #1
    Join Date
    Jul 2007
    Location
    TEXAS
    Posts
    92

    Default 200DX no high frequency start

    I have searched and searched.

    I did check the contacts cleaned and set at .010

    I did blow the machine back out and clean out the dirt dauber nest in the bottom. It will weld on lift and stick.

    Where do I check the input voltage to the HF transformer? it looks like the transformer is behind the HF contacts. The machine is an 2005 model, this is the first time I have had any HF problems, actually this has been the first problem I have ever had out of the machine.

    Where do yall check to see if the pedal is triggering for the HF I had seen that some people had some HF issues over the pedal. My pedal did try to commit suicide off the cart a few weeks back but was saved at the last second by the cord.

    Trying to weld up some band saw blades with no HF is proving to be next to impossible.

    Thanks!!!!!!!!!
    DYNASTY 200DX
    SPECTRUM 625
    MM 251
    BWE

  2. #2
    Join Date
    Aug 2010
    Location
    Los Angeles
    Posts
    1,163

    Default

    The pedal cord would be the first thing to check since you had that incident. I have had many with broken wires in the cord.

    You could disconnect the pedal and try lift start to see if it works then. Of course you could try another pedal if you have one.
    Nothing welded, Nothing gained

    Miller Dynasty700DX
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  3. #3
    Join Date
    Jul 2007
    Location
    TEXAS
    Posts
    92

    Default

    do yall have a wiring diagram for the pedal?

    I'm going to go grab my neighbor's pedal and try it. Hopefully that is it. Should be an easy fix there
    DYNASTY 200DX
    SPECTRUM 625
    MM 251
    BWE

  4. #4
    Join Date
    Jul 2007
    Location
    TEXAS
    Posts
    92

    Default

    well I found my finger control. Tried it still no HF, tried AC and DC. No HF and NO HF sounds at all. Where do you check to see if your getting power to the HF board?

    Thanks!!
    DYNASTY 200DX
    SPECTRUM 625
    MM 251
    BWE

  5. #5
    Join Date
    Jul 2007
    Location
    TEXAS
    Posts
    92

    Default

    .....anybody up yet??
    DYNASTY 200DX
    SPECTRUM 625
    MM 251
    BWE

  6. #6
    Join Date
    Jul 2007
    Location
    TEXAS
    Posts
    92

    Default

    Well it went to the service center yesterday hopefully its not the
    DYNASTY 200DX
    SPECTRUM 625
    MM 251
    BWE

  7. #7
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,608

    Default

    Just a problem with your HF start board, not a big deal nor is it expensive.

  8. #8
    Join Date
    Jul 2007
    Location
    TEXAS
    Posts
    92

    Default

    The shop just called me. One bad IGBT $350 and One bad board $75. $130 labor They said the HF works its just the other problems causing it not to work. They said that is why I was having so much of a problem trying to lift arc what I was welding also with the bad IGBT the current was real hard to maintain. It is the bottom snubber board. Also the one I found the dirt dauber nest on. Hmm I think they may have killed my machine. FM

    One hand I think about trying to get the parts, and matching up the IGBT since I have found 200A 1200VDC IGBT's for $200
    Last edited by jake; 08-07-2012 at 10:55 AM.
    DYNASTY 200DX
    SPECTRUM 625
    MM 251
    BWE

  9. #9
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,608

    Default

    Get it fixed for that quote.

    I kinda think there is more to this especially when they install the new parts, and no you won't find that specific pre regulator inverter module anywhere.

  10. #10
    Join Date
    Jun 2011
    Location
    New Milford ct
    Posts
    75

    Default

    That ain't cheap, wow

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