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Syncrowave 351 no HF start

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  • Aeronca41
    Schematic in the manual is next to useless. Watch eBay and see if you can find a technical manual for it; they show up occasionally for the older machines. Cruizer may be able to help if he sees this thread.

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  • dveatch
    started a topic Syncrowave 351 no HF start

    Syncrowave 351 no HF start

    Have serial number KJ122640. Like the subject says, there is no HF start, interested only GTAW. Once struck the foot control works fine. I did check the switch in the foot control with an Ohm meter and it is fine. Since I do have control of the arc I figure the potentiometer is fine. Just to be sure cleaned the contactors and adjusted them for .008 (one was way over and the other way low). I do have arc on both contacts when striking. CB1 is not tripped.

    After some googling around it seems the problem might be PC1, PC2 or maybe the PC3. If I had the component level schematics I could narrow down a bit more. Any additional thoughts to narrow this down? If I was to take a WAG my guess would be PC1 but trying to avoid shotgun maintenance.