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  1. #1
    Join Date
    Dec 2013
    Posts
    25

    Default Miller Roughneck 1E diode help

    S/N: HE805340
    IMG_20131209_200416_292.jpg

    can anyone tell me which diode is missing from this pic? I have looked on diagrams and pics on the web but none show this diode on this board. Please help

    In case you are wondering, the underlying problem is only getting 40VAC to outlets and 1.5V on weld jackets.

  2. #2
    Join Date
    Dec 2013
    Posts
    25

    Default more info

    I have replaced most of the diodes and I need to know the diode that is running vertically in between the two vertical columns of diodes, please.

  3. #3
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,910

    Default

    Yep, looks like 11 diodes altogether, so yep that vert one is missing. Look like they are all the same so update it a little and stuff in all 2 amp 600 volt units

  4. #4
    Join Date
    Dec 2013
    Posts
    25

    Default

    But what number diode is it so I can make sure it is oriented correctly

  5. #5
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,910

    Default

    No one can tell you that unless they have one of those boards in front of them.

    Look at whats left of the one on the board. Can't help you aftr that. I suppose that if it blows, its the wrong way. Your installaton really needs refining.

  6. #6
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,910

    Default

    The diagram ONLY shows the diodes in circuit. It does not show the diodes orientation on the board.

  7. #7
    Join Date
    Aug 2008
    Location
    Orange, TX
    Posts
    1,215

    Default

    All 11 diodes are 3A, 600V and you can just barely make out the symbol on the board that the vertical one has the cathode (end with stripe) down.
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  8. #8
    Join Date
    Dec 2013
    Posts
    25

    Default

    I see that now that you have pointed it out. Thank you duaneb55. Will update asap with results

  9. #9
    Join Date
    Mar 2011
    Location
    st-eustache qc.canada
    Posts
    226

    Default pics that may help

    sorry i know nothing about boards but out of curiosity i found that, maybe you saw it...

    http://weldingweb.com/showthread.php...ghneck-1E-Help

    i think duane been there done that

  10. #10
    Join Date
    Dec 2013
    Posts
    25

    Default

    Thanks snowbird. But that image doesent have the diode in question

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