I have a power supply that has not been used much, several months ago I went to use it and as I was setting up the voltage and amperage I heard a loud pop and the unit turned off. The main fuse was blown. I replaced the fuse and it turned on but was unable to set voltage or amperage, they both stayed at 0.
upon inspection I found the 2 Mosfets blown along with 2 resistors. The mosfets are PTA09N50 and a 68 and 10k resistors.
I replaced the components and turned it on, there was no blown parts but the voltage only went up to 2.2V, I turned the unit off and after a while started to toublshoot it, upon turning the unit on the mosfets blew and one of the resistors went open. The main fuse was also blown
I was unable to find any shorts, any input would be greatly appreciated. please see photos for better illustration.
the second time I removed the mosfets I ended up peeling back a trace, I will have to repair that.
upon inspection I found the 2 Mosfets blown along with 2 resistors. The mosfets are PTA09N50 and a 68 and 10k resistors.
I replaced the components and turned it on, there was no blown parts but the voltage only went up to 2.2V, I turned the unit off and after a while started to toublshoot it, upon turning the unit on the mosfets blew and one of the resistors went open. The main fuse was also blown
I was unable to find any shorts, any input would be greatly appreciated. please see photos for better illustration.
the second time I removed the mosfets I ended up peeling back a trace, I will have to repair that.
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