With the control board, yes sir!

However, I let it run on 24v and I did notice a bit of vapor (or maybe even smoke) coming from the power electronics.

It was slowly coming out right near where the inverter electronics meet the aluminum case. It didn't have a scent that I could detect. Nothing was ...

Some interesting developments here. I did get it to spin! It appears my flux is more conductive than I remember and was causing temp sensor to read wrong. I gave the board a bath in IPA and scrubbed off all the flux I could see.

It also wouldn't spin up on 24v with just 1850 boost. Setting it to ...

I put some more time into this last evening and the results are the same. Motor refuses to spin. It also still randomly trips the "overcurrent" safety despite me never seeing >10a in the spot values.

I tested from the connector pin back to the chip and it actually tests fine. So maybe there's something wrong with the temp sensor within the inverter? I'll have to take a look later.

For a quick test, I raised the max temp and tried to spin. The inverter makes a whining noise, however, the motor ...

tmpm stays at around 7.3c-8.1c, which is strange because ambient temp is 21c. pot1 and pot2 appear to be stable.

Pin 1: 1.68v
Pin 2: 1.72v
Pin 5: very low, maybe open circuit?

Attached are the requested photos. I had to take two photos of the micro controller as I couldn't zoom out far enough with my microscope.

I also attached the photo I took when I first discovered the solder ball. It can be kinda hard to see, so there's two, one that is edited to point it out.

I PM ...

Thank you kindly!

I discovered a loose solder ball between some pins on the STM32, between the UDC_11 pin and another pin (VDD I think?). I reflowed the solder on that side of the IC and the udc measurements are behaving better now.

Since tmphs is still giving me trouble I attempted to reflow ...

Hello,

I recently purchased an LDU logic board from the shop. After attempting a bench test, I found that the a few measured Spot Values are behaving quite erratically.

"udc" and "temphs" are both swinging around wildly.

udc: Seems to swing around between 20v and 550.15v.
tmphs: Seems to stick ...