So I made a bone head move and got distracted by something and I touched a meter probe to my kweld. I know I know, why is it not in a case, well I printed one but it was mirrored for some reason and I didn’t have any more filament so I was using it anyway, yep I’m a dummy and trashed a $250 machine.
The machine immediately turned off and will not come back on, I touched the prob somewhere in the bottom of the screen or the knob.
Is there anywhere I can send this for repair?
Already shot them an email, also the Canada retailer.
I’m going to take it to my shop tomorrow and look under the microscope, I don’t see anything with the eye damaged.
Looking for someone who knows pcb and the components that can troubleshoot it if the manufacturer can’t help.
Unless you know what is broken, fault tracing, repairing, paying for postage etc will prob run you more than 250 bucks.
I believe you are the maker of this product, hope you don’t mind my tag, think it’s toast? I can not see any visible damage.
I cannot spot anything bad on the board, except for lots of debris. If some of that is metallic, then this can make you a bad day (or has already).
You can try to troubleshoot the board, maybe it is something simple:
Cheers Frank
Thanks Frank, I really appreciate the tips on where to look, definitely my dumb ass that caused the bad day not the debris, I know for sure I touched the probe of my meter to somewhere in the area of the pins for the screen or the pins of the potentiometer, my son asked me for a screwdriver for his toy and I was careless with my hand when I was paying attention to him. Live and learn, expensive lesson though haha.
I have 10v across the capacitor
I do not have voltage across the left two pins on the lcd
The ic3 regulator does get warm
I did not find any other warm components
sounds like its strugling, either damaged or you have a short on the 3.3V net(either inside the IC or on the PCB). Try meassuring resistance between the 3.3V net and a ground point. Anything below kOhm is no good
Am I correct in assuming that the pin on ic3 read as follows
I have 10v between pin one and three but less then one volt between pin two and three, which I assume should read 3.3v?
This leads me to believe that the ic3 regulator is bad?
Or ground in the center and output on right pin? Either way I should have 3.3v on pins two and three… I think
Yeah I’m pretty sure ground is center pin, not only do I not have 3.3v output, I have continuity between pin two and three which I also don’t believe should be so.
For anyone following along, I’ve learned that any short on the 3.3v net could create the issues seen at ic3, it could be a symptom, not the cause.
Another assumption on my part, is that since I shorted pins on the lcd (and see no physical damage externally) that are fed from the ic1 stm32f, and I have continuity between Vss And Vdd the short could be internal to ic1 thus renders the kweld irreparable, well I assume not cost efficient since I couldn’t replace the ic1 myself and I assume it would need programming even if I could.
Again a lot of assumptions, or deductions, lol
Is there a way to check resistance to isolate the short either before or after or to the ic1 itself to rule that out or confirm without removing it?
I believe I looked at the diagram correctly, Vss and Vdd 2&3 are shorted but Vss_1 and Vdd_1 are not on my chip
Again all assumptions on my part, I have no idea what I’m doing lol
For anyone who’s was following along, the consensus is that I fried the chip, and even if I could replace it, wouldn’t be able to program it. The vendor, grid rewired in Canada was great and sold me just the board and saved me a good chunk of money to get up and running again.
Moral of the story, don’t be a dummy like me and use unprotected electronics around lose metal objects and expect things to survive.
I’ve got two of these kwelders I managed to short and now broken. I’m hoping to find someone in the sf Bay Area who could repair them. If u fix one u can have the other
