Are there any test points on the board to troubleshoot anything? I’ve done board level repair in the past and sometimes you can check some spots and that will help you go in the right direction.
everything is broken out so there are no points that are specifically for testing, but all points can be used for testing.
in your case though, if you have a short, test points won’t help much
Ok, I removed IC14 and I now have 1.4 ohms on the 3.3v circuit. Not too sure what that means, but at least it’s not 0 ohms now. I don’t suppose you know what a working boards resistance is without the regulator in do you?
Thanks again for your help. I finally found the responsible IC.
Which was it ??
The first motor driver, I dontbhave a clue how that happened. I’m really curious if those pads come off the of the board. I have a lot of soldering to do now.
I really hope you are able to re-solder everything and get it to work !
Ok, replaced all of the IC’s I took out and something else is bad… Goodbye smoothie. I’m official done. I’ll move on to the next thing. I’m $220 in the hole and still using RAMPS.
Can you please contact me at wolf.arthur@gmail.com and remind me about this post ?
Hey Arthur,
Just my $.02, but would it be worth considering adding galvanic isolation to the USB, I/O, and thermistor pins of the Smootheboard V2 design to help make it more “robust” against ESD/ground loops/mishaps/etc? Obviously this adds a little cost and circuit complexity but when you have an expensive and sensitive BGA FPGA to worry about protecting…I think it’s a fair trade-off.
Dieter