Bitcraze Forums

Hello everybody,
My crazyflie2 works hard since I bought it in November 2015.
Probably due to many crashes, the M3 blue led has random functioning...
What is strange, when I push with a pencil in a fixed place of the breadboard, the led is right controlled.
Here you can see photos.
How can I repair my copter ?
Thank you!
Jean-Claude

I would expect the track to have a crack somewhere and highest probability for that would be closest to the led pads. I would scrape off the solder resist just beside the pad on the track and solder it together with the pad.

Hi
I have a new machine for a few months. Now, the bad contact is for th M4 (transmission) LED. I will not try to repair because I lost one machine with wrong soldering attempt...

Could you take a makro photo of the M4 LED. Maybe we can spot the problem and hopefully there is an easy fix?

Hi Tobias
The quad is connected.
When I push up the M4 arm, the M4 led is off.
When I push down, the led blinks red/green, which is the right behaviour.
See photos. On the third photo, the LED is OK.
I don't think that there is a solution. Nothing is visible on the PCM.
Jean-Claude

Then I don't suspect that the trace has actually cracked but that the solder to the LED is to blame. I think it should be fixable by quickly just melting the solder on each pad of the LED.

I'll try...

Hi
Impossible to repair when the cracks are in the track which is the case here.

Sorry to hear that you weren't able to fix it. If you have Flux try adding a bit of that while melting the soldering, this will make the solder creep better.

Hi
I changed the status from CAN'T BE SOLVED] to SOLVED because the discussion is closed now for me. But the problem is still present, my boards are really high sensitive to shocks.
A+
Jean-Claude