studentkra

Hello. KiwiSDR stopped working after the thunderstorm. The power supply goes into protection. There is a short circuit on the KiwiSDR power connector.

The BeagleBone board also stopped working. Separately from the KiwiSDR, the BeagleBone shows no signs of life and the TPS65217C chip is very hot.

The problem was not only in the failed transformer T301. The 5V power line had a resistance per mass of 5 ohms. 

All linear stabilizers are out of order. Three pieces LP5907 and LMR10530Y. Moreover, the LMR10530Y was pierced through. That is, the 5V input was connected to the 1V output.

For further diagnostics, the stabilizers were replaced with similar ones.

KiwiSDR is working, but additional testing is required.

I made a short video of this repair.

https://youtu.be/6Vtmoc8Z-Eg?si=PIFDW3fEnpm8zuwE

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