hi,
In the simple SMPS which output a 5v dc, there is a power switch IC (M02659). I was planning to have a look on the waveform of the drain pin of this IC to get a some sort like switching status(i'm not sure whether is it correct).
After i connect the negative(black) wire of my probe(from oscilloscope) to the GND pin of this IC, and then i switch on the main AC. strip happen and the fuse inside the SMPS blow. ***But i haven put the probe on the drain pin.
i was wonder why strip happen.
hope someone can help me on this.thank you.
In the simple SMPS which output a 5v dc, there is a power switch IC (M02659). I was planning to have a look on the waveform of the drain pin of this IC to get a some sort like switching status(i'm not sure whether is it correct).
After i connect the negative(black) wire of my probe(from oscilloscope) to the GND pin of this IC, and then i switch on the main AC. strip happen and the fuse inside the SMPS blow. ***But i haven put the probe on the drain pin.
i was wonder why strip happen.
hope someone can help me on this.thank you.