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Thread: XMT304 help 6

  1. #1
    Join Date
    Apr 2012
    Location
    Oregon
    Posts
    37

    Default XMT304 help 6

    I have done a fair amount of testing on this machine. Input voltage is 241 vac, contactors look almost new inside, IGBT's seem ok, lem has power and is not shorted, output diodes not shorted. Anything I should double check before replacing the top PC board? (Anything that would harm a new board)

  2. #2
    Join Date
    Mar 2014
    Location
    Texas
    Posts
    54

    Default

    Are the caps balanced?

  3. #3
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,683

    Default

    help 6 ALWAYS means that the top board is toast, so either the unit is not recognizing the input voltage or the pulse transformers are not firing the igbts.
    Last edited by cruizer; 05-17-2014 at 09:12 AM.

  4. #4
    Join Date
    Apr 2012
    Location
    Oregon
    Posts
    37

    Default XMT304 help 6

    Caps are balanced, but at a reduced voltage because CR1 does not pull in.

  5. #5
    Join Date
    Apr 2012
    Location
    Oregon
    Posts
    37

    Default XMT304 help 6

    Thanks cruizer.

  6. #6
    Join Date
    Apr 2012
    Location
    Oregon
    Posts
    37

    Default XMT304 help 6

    New board installed. Machine works great. Thank you to all who helped.

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