Welder not turning on - Learning

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • CapLeaker
    Leaking Member
    • Dec 2014
    • 8048
    • Canada

    #61
    I use MG Chemicals Thermal Paste

    Sweet! You got her going again!

    Comment

    • CapLeaker
      Leaking Member
      • Dec 2014
      • 8048
      • Canada

      #62
      Forgot, what did you change them resistors out for? 0.1 Ohms or 1 Ohms?

      Comment

      • Olles4
        Senior Member
        • Apr 2022
        • 63
        • Slovakia

        #63
        Originally posted by CapLeaker
        Forgot, what did you change them resistors out for? 0.1 Ohms or 1 Ohms?
        At the end i changed the resistors, i tried deferent brand but stayed at 1 Ohm. And changed c204 from 15nf to 10nf.
        I also tried 0.1 ohm but the mosfet was running loud and the startup of the welder was not smooth so I think 1 ohm is a must.

        I really Really appreciate your BIG help in this project!!!
        You are amazing!

        Comment

        • CapLeaker
          Leaking Member
          • Dec 2014
          • 8048
          • Canada

          #64
          The credit goes to yourself. You were the one that fixed it, showed interest and commitment to fix this thing and you may have learned a couple of tricks of my cheat sheet too. I just gave some directions and helped you navigate around road blocks.

          Inverter welders and plasma cutters can be sometimes really easily repaired, but also can be a real pain in the butt to figure out the problem why it doesn't work.

          Comment

          Related Topics

          Collapse

          • spleenharvester
            Reverse engineering of DoCreate DHJ567 handheld spot welder
            by spleenharvester
            Hello everyone

            I attach a schematic and teardown photos for the DoCreate DHJ567 handheld spot welder. I bought this welder for temporary use while my supercapacitor welder was waiting for replacement parts. It cost only £24, though there is a screenless version available for £17.

            Performance: The absolute maximum it can handle appears to be 0.15mm of pure nickel. Reliability was not great - welds were very inconsistent, ranging from weak attachment to burning through the strip. However, I was able to build a 5S2P pack without losing any cells. It's a bit difficult getting...
            05-08-2025, 02:52 PM
          • Olles4
            Sencor SLE 40F82M4 - not turning on - Learning
            by Olles4
            Hello people. I trying to repair my Sencor TV. No standby light, not tuning on what i found there is 6V where 12V should be and 8V where 16V should be. Any suggestion?
            05-18-2024, 01:40 PM
          • tibimakai
            Lincoln Electric LE31MP welder not turning on
            by tibimakai
            This is my own welder, that blew up while welding. There is no warranty on it. Purchased it a year ago, sealed box from Craigslist.
            It worked great until now, about a year.
            What I have found is a blown trace next to the main capacitors, it seems like also got damaged the SMPS IC, output MOSFET and a 1 Ohm resistor to the ground from the MOSFET.
            After replacing these components, the relay, fans turn on and it sounds like it's working, but there is no output voltage for the welder, LEDs do not turn on.
            So there are more components that are damaged.
            I'm having a hard...
            10-14-2023, 07:40 PM
          • nicktasios
            Macintosh Quadra 840AV PSU
            by nicktasios
            I had my Quadra 840AV (which I recapped and had working) plugged in for some time without using it and randomly decided to turn it on today. Unfortunately it did not turn on. After checking the PSU, I found out I was not getting anything from 12V, only from the 5V rail. After a few minutes, I removed the PSU and plugged it back in the electrical outlet and it suddenly started making a weird sound and soon after smoke started coming out. I quickly unplugged it. I opened it up but on first instance I didn't see anything out of the ordinary really. I later turned it back on and one of the MOVs blew...
            12-22-2024, 05:07 AM
          • drscoot
            HP X360 convertible battery blown fuse error, not charging
            by drscoot
            HP Modelnumber: 14-dh0061nb​
            This laptop had a shorted cap on a Vcore section. After replacement is works again. But there is still a battery issue.
            The battery is HT03XL and with the built-in component test from HP, in the Power section, I get an error: Logic State: Calibration required (20), Charge state: Blown Fuse (42)
            I have another same battery, also with error: Logic State: Very Weak (70), Charge state: Blown Fuse (42)
            And a third battery TF03XL (looks identical) with error: Logic State: OK (0), Charge state: Blown Fuse (42)
            All these 3 batteries are charging...
            12-15-2023, 05:54 AM
          • Loading...
          • No more items.
          Working...