I have in my businness(mill) a PCB (control-power supply)which takes 24v Dc and switch it in a LM2575-T5 switch regulator and also use 24v to make 12volts,in order to give orders to the system tod do many jobs and also power to a cell(i do not know the exact voltage there).The system works but after a while stops.Some times burn the lm2575 and after i change it works again for a while and the same problem.I check capacitors near lm2575 are ok.Do you have any idea what is going on,I load a photo of the PCB.Thanks.
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