Hello, I'm trying to rebuild an ATX computer power supply. I'm using the scheme in the images.
I'm using 127V, when I turn on the power transistors. I thought it could be the 494 that was not being activated. I activated it from an external source and it still burned the power transistors. I removed the 330k resistors that connect the power transistor collectors to their bases and still burned the same transistors.
Can someone, with experience in switching power supply, could help?
Thanks.
I'm using 127V, when I turn on the power transistors. I thought it could be the 494 that was not being activated. I activated it from an external source and it still burned the power transistors. I removed the 330k resistors that connect the power transistor collectors to their bases and still burned the same transistors.
Can someone, with experience in switching power supply, could help?
Thanks.
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