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  1. #1
    Join Date
    Sep 2010
    Posts
    4

    Default Trailblazer 301D - no exciter voltage

    Hi-
    We have a Trailblazer 301D that is not putting out any voltage for welding or AC. Voltage checks shows that there is no exciter voltage coming from the power board. The power board is getting DC voltage however and both the power board and control boards work when swapped with an identical machine. Does anyone have any idea what else I can check?
    Thanks, Austin

  2. #2
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,841

    Default

    Check fuse f1 and bridge SR2. If F1 is blown then SR2 has to be replaced

  3. #3
    Join Date
    Sep 2010
    Posts
    4

    Default

    Thanks for the reply. F1 is fine. SR2 was replaced all ready.But would this affect voltage on wires 131 to 134 going to the rings? I do not detect any voltage coming from the power board on these pins.

  4. #4
    Join Date
    Sep 2010
    Posts
    4

    Default

    Thanks for the reply. F1 is fine. SR2 was replaced all ready.But would this affect voltage on wires 131 to 134 going to the rings? I do not detect any voltage coming from the power board on these pins.



    Quote Originally Posted by cruizer View Post
    Check fuse f1 and bridge SR2. If F1 is blown then SR2 has to be replaced

  5. #5
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,841

    Default

    lets check to make sure you've got battery voltage comming in to run the darn thing first so test from RC15-2 to RC15-8

    So depending on your serial#, you should have say -13 VDC at RC15-1 to RC15-8 with a serial # less than LC241176 (Pos lead on RC15-1)

    Above that serial #, you should get zero volts
    Last edited by cruizer; 09-07-2010 at 05:27 PM.

  6. #6
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,841

    Default

    May be as simple as a corroded R5 connector plug from the engine to the power board and front switch.. It happens....

  7. #7
    Join Date
    Sep 2010
    Posts
    4

    Default Traliblazer 301 no exciter voltage

    Took a while for me to get back on this, but the checks on RC15-2 to RC15-8 are 12 volts and on pins 1 to 8 are zero volts. The serial number is LE066615 so from what is stated below, it sounds like this is correct. Do you have any other ideas?

    Thanks

    Quote Originally Posted by cruizer View Post
    lets check to make sure you've got battery voltage comming in to run the darn thing first so test from RC15-2 to RC15-8

    So depending on your serial#, you should have say -13 VDC at RC15-1 to RC15-8 with a serial # less than LC241176 (Pos lead on RC15-1)

    Above that serial #, you should get zero volts

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