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Thanks i think ill build a subsitute.
I cant find the original aux power supply fault i also powered up the vcc with external voltage " 15 vdc" and still no signal from the uc 3842.
Hello everybody. I am new member i am a berber from morocco with a diploma in industrial electronics repair and really happy to discover this board.
Ok back to the problem . I have an electronic welder with a pcb containing two switching circuits .
The main one is a 4 igbt half bridge...
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