Those will be resistors. Unfortunately I think they are too small for any markings to appear on them. The Tekko32's are on my quad all shrink wrapped and covered with a protector so I don't really want to go taking stuff apart on a working quad just to check the resistors on mine.

It may be on a non-critical part of the circuit (i.e. just for the LEDs) in which case it doesn't matter and the LED just won't work which you may not care about anyway. I would power it up and see if the LEDs all work. If one of them doesn't then I probably wouldn't worry about it. The LEDs are off by default so you need to configure them to be on in BLHeliSuite32.

If it turns out to be for something more than just the LED then you may need to replace it, so have a look with a magnifying glass and see if there are any markings on the same resistor on one of your other ESCs. I suspect there probably aren't any markings on them, in which case your only real option is to try and measure the resistance of one on another of your ESCs with a multimeter. You can try measuring the resistance with it still in-circuit but that isn't always successful due to other components on the board in the same circuit as the resistor. For a truly accurate result you really need to take components out of circuit, but there is obviously a risk in doing that, especially with such tiny SMD resistors. I would try an in-circuit resistance test across the resistors and see what reading you get. Do the same across the other ESCs to see if you get a consistent reading. If you are brave enough, remove one from the circuit of another ESC and measure its resistance. That will give you a definite and accurate resistance reading. Then you can order a replacement resistor of the same value and solder it onto the damaged board.

Thanks Snow!
Uh, what are the chances that its just a resistor for LED.

I guess i am ordering another stack of 4, not like I wont need them but its a shame that with my last connection I managed to do this.

I wonder if Holybro has any docs about their esc layout of electrical parts? Something that might give me some numbers or?

This should go to "How not to solder" - dont desolder and broke your resistors while making a joint lol...

(23-Nov-2019, 04:56 PM)notafraid_fpv Wrote: I guess i am ordering another stack of 4, not like I wont need them but its a shame that with my last connection I managed to do this.

I wonder if Holybro has any docs about their esc layout of electrical parts? Something that might give me some numbers or?

Those Tekko32's are bullet proof. You won't need any spares. I've abused the hell out of mine and they're still as good as the day I fitted them. Maybe I'm just lucky but I've never burned any motors or ESCs. As long as the current draw of your motors is matched to the ESC's then you'll be fine.

You're not going to find any schematics anywhere. That would make it too easy for any competitors trying to clone their products. Plus, it would also allow people to do easily do DIY repairs instead of just buying a whole new ESC, so it's not in Airbot's or Holybro's interest to make life easy for anyone.

(23-Nov-2019, 04:56 PM)notafraid_fpv Wrote: I wonder if Holybro has any docs about their esc layout of electrical parts? Something that might give me some numbers or?

First of all, you could not locate the missing part? It probably didn't go too far. Secondly, I have had good luck writing to the manufacturer and asking the spec for a specific component. So worth a try. They will not give you the schematics, but they will give you the value.

@voodoo614 I have the missing part, but it's so tiny I doubt I would be able to work with it..
Also what I don't understand is how it's attached to the board, since there is no "metal pad" to stick solder to.
It's like a small black hole there..

But thats for suggestion, I will try contact Holybro just to see if they respond.
Regardless going to order some more ESCs right now.

If you take a closer photo, we can probably tell you whether you rip off the pad. If you did rip off the pad, then you can search for another pad. If the component is too small, then it doesn't really matter if you contact the manufacturer. You can measure the resistor with the one you have. The manufacturer might tell whether it is important or not. If it is important, then you can try buying a regular resistor and try to solder.

Sorry, I accidentally closed thread. Trying to open it now.

I tried to add small solder on pad but it doesn't attach so I guess I have ripped it off completely.
Well it's lesson learned to watch out where I am sticking my solder iron!!

Ordered new esc and will wait for response from vendor just to hope that they say it's nothing important. haha. probably not

Can't wait to get over this incident and continue building the drone.
So far it's like this (with 1 prbly broken esc)

(23-Nov-2019, 11:39 PM)notafraid_fpv Wrote: I tried to add small solder on pad but it doesn't attach so I guess I have ripped it off completely.
Well it's lesson learned to watch out where I am sticking my solder iron!!

Looking at your photo I can see that one of the two pads for the resistor is missing, so it's game over. It's almost impossible to hand solder such minuscule components by hand anyway, even with the proper equipment. Your only hope would have been a hot air rework station but the challenge then is that you would end up melting the plastic housing on the LEDs which are right next to that component.

Indeed it's a lesson learned. Look on the bright side though - at least it was't the expensive FC that you trashed.

(24-Nov-2019, 12:20 AM)SnowLeopardFPV Wrote: Looking at your photo I can see that one of the two pads for the resistor is missing, so it's game over. It's almost impossible to hand solder such minuscule components by hand anyway, even with the proper equipment. Your only hope would have been a hot air rework station but the challenge then is that you would end up melting the plastic housing on the LEDs which are right next to that component.

Indeed it's a lesson learned. Look on the bright side though - at least it was't the expensive FC that you trashed.

Yep.. it also looks for me impossible to do anything!
It's unwritten law - you will break something that you didnt order SPARES for!

So I got 4 of the ESCs again, the shipping is about 7-35 business days.. so idk.. maybe I will continue the build ignoring one arm.. 
I am not in rush, since winter will end only few months from now, but still it's a bummer that once you start building you want to finish, but nooooooooooo. 

Don't worry about how long it takes to build. When I did mine I think I got an award for the slowest ever build, and Krohsis kept poking fun at me Maybe you can take my crown  That said, I think Voodoo has probably already trumped everyone with his X-Class build  

I am slowly working on the X class. Promise.

please no promise for slow-work voodoo ;-) joke!

i like the thread about your x-class build log and the updates, regardless of time.. 

Guys, good news for me!
It turns out that it indeed was a resistor for LED. 

Even better - according to Holybro it will only make one color unavailable for the LEDs.
I feel so lucky and I am grabbing my drone and hopefully will post some progress within few hours


Snow and Voodoo, you were both right and I can't thank you enough for the help and suggestions you gave me!
Now I am going to get 4 extra ESCs in the following weeks, so I guess I should start looking into frames to build my 2nd build 

Good excuse for a new build. I knew you planned it that way all along.