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Hobart 10k low voltage high frustration

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  • Hobart 10k low voltage high frustration

    I have a Hobart champion 10k that puts out around 80 volts at the welder and only 72 volts at the generator receptacles.

    during troubleshooting I noticed I get around a 20 volt output at the brushed on #21B while running but only 3.volts on #26B while running. The LED on the circuit board doesn’t light up either.

    it will pop the breaker above the receptacle if given much of a load more than a drill.

    brushes and rings both look good and I cleaned them to be certain.

    what can I test to be sure it’s the circuit board and not another issue? I don’t want to put a new board on and fry it. Any tests I can do to locate the problem in certainty? I’m great with a soldering iron so if it’s something simple on the board I can handle that as well. I just need to know what I’m looking for. Thanks in advance for any and all advice!

  • #2
    Hi there,

    How old is this machine?

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    • #3
      I don’t know the exact age. It’s an LC623242. 220 hours on it.

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      • #4
        Also checked ohms at the rings and had 18.9ohms. Wire 26 unhooked and tested to ground shows zero with the engine off.

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        • #5
          Lugnut, Have you checked the fuse F1 on the front of the machine? This fuse being blown is often the culprit in low voltage cases such as this.

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          • #6
            I have checked F1 and it is good.

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            • #7
              Have you verified that the engine is running at the proper RPM?

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              • #8
                Yes sir. The engine specs out perfectly. I think that’s what has me so confused on where to check next. Engine is performing as it should and I get enough voltage to power a drill and that’s about it

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                • #9
                  And just to check, the low voltage is regardless of where the controls for welding are set?

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                  • #10
                    That is correct. The voltage remains the same no matter the setting on the welder portion.

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                    • #11
                      Ok went back to do some checking. Started the welder. The engine fired right up. Turned the switch to Run/Idle and it remained at an extremely high rpm. So it’s not dropping down to what I would believe is a normal idle. I checked the voltage at the idle solenoid and it was 4 volts at the black wire and ground was good, clean and solid. Not sure if this is a new issue to add to the others or if it is a result or possible cause of the other issues
                      Last edited by Lugnut; 06-03-2020, 03:48 PM.

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                      • #12
                        I would say you might need to take it in for service, this sounds like it could be a PC1 issue.

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                        • #13
                          What exactly is a PC1 issue

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                          • #14
                            PC1 is a printed circuit control board. Great for mass production; horrible for troubleshooting and repairs.

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                            • #15
                              MIght consult with company below to see if it's worth sending in circuit board for evaluation.... Also they do list a large selection of circuit boards for replacements... Don't know anything about company but it may be place to start...

                              https://innovatcorp.com/

                              Dale
                              "Fear The Government That Wants To Take Your Guns" - Thomas Jefferson..

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