manos555
New Member
Hi there thanks for accepting me in the forum
A friend bring me a welding machine (brand profi) yesterday when open the switch the machine start smoking and stop I disassemble and find that had burn 6 of 10 mosfet irfp460 and the 7 resistors of 15ohm 1/2 I replace them all when I power on in seconds blow up one resistor shut down I replace the resistor but the same thing not in the same but in other place I change 5 resistance but still the same I can see anything else be burned any ideas what happen ? need to replace the resistor with 15ohm 1w?
I appreciate any help
A friend bring me a welding machine (brand profi) yesterday when open the switch the machine start smoking and stop I disassemble and find that had burn 6 of 10 mosfet irfp460 and the 7 resistors of 15ohm 1/2 I replace them all when I power on in seconds blow up one resistor shut down I replace the resistor but the same thing not in the same but in other place I change 5 resistance but still the same I can see anything else be burned any ideas what happen ? need to replace the resistor with 15ohm 1w?
I appreciate any help
![IMG_1584_zpsqdzhbesh.jpg](https://i787.photobucket.com/albums/yy159/Manos555/IMG_1584_zpsqdzhbesh.jpg)
![IMG_1582_zps4bj6fjlv.jpg](https://i787.photobucket.com/albums/yy159/Manos555/IMG_1582_zps4bj6fjlv.jpg)
![IMG_1583_zpsrfmkcrjj.jpg](https://i787.photobucket.com/albums/yy159/Manos555/IMG_1583_zpsrfmkcrjj.jpg)
![IMG_1585_zpstpb7vuyi.jpg](https://i787.photobucket.com/albums/yy159/Manos555/IMG_1585_zpstpb7vuyi.jpg)
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