Migatronic 166 rally

  1. Jaak Member

    Messages:
    5
    Location:
    belgium
    Hi,
    This is my first time on here looked like the best place to go with my question.
    I have an old ( +20 years) Migatronic rally 166 with a faulty circuit board,
    does anyone have a diagram with the values of the components.
     
  2. Jaak Member

    Messages:
    5
    Location:
    belgium
    Hi,
    I had forgotten to send the picture of the circuit board.
    Sorry for my poor English language use, I use translation of Microsoft Translater
    Greats jaak

    [​IMG]
     
  3. the snooper

    the snooper getting older by the day

    Messages:
    20,505
    Location:
    Hull UK
    the values of the components should be on them, what has gone wrong no wire feed
     
  4. Jaak Member

    Messages:
    5
    Location:
    belgium
    Hi, de snooper
    The engine ( wire motor) is running with the help of external battery charger
    There is a component burned, but do not know with what to replace
    The photo of the circuit board is not of my welding machine, but to own internet I managed to insert photos .
    Greetings jaak
     
  5. the snooper

    the snooper getting older by the day

    Messages:
    20,505
    Location:
    Hull UK
    post a good picture of your circuit board if you can and one of the failed component, some machines have the same boards and someone may recognise it
     
  6. Jaak Member

    Messages:
    5
    Location:
    belgium
    Hi,
    This is my circuit board, am bottom right hand side is a white component ( M5W 12R 5% ) that I have replaced, this piece was burned. The original was no longer readable and have replaced it with the same value of the lower component ( R12 5WA-1 )
    Greetings jaak
    [​IMG]

    [​IMG]

    The back is already been restored and has worked well.
    [​IMG]

    [​IMG]
    The white component was originally also a green, but the values were unreadable and so replaced by a with the same value
     
  7. Jim Davey

    Jim Davey R H Davey Welding Supplies Ltd

    Messages:
    5,432
    Location:
    Southampton
    That's a 5 watt, 12 ohm ceramic resistor. If that's blown then the chances are that one or both transistors (black squares with three silver legs) are dead too.
     
  8. Jaak Member

    Messages:
    5
    Location:
    belgium
    Hi,
    Which values should I measure at the resistor the outer legs give a value in Ohm,
    the middle leg with the outer doesn't care, ( resistor are dead ??? )
    graetings jaak
     
  9. the snooper

    the snooper getting older by the day

    Messages:
    20,505
    Location:
    Hull UK
    They will be pnp or npn positive negative positive and a basic test should show readings in 1 direction only like a diode
     
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