Xbox One Blown Mosfet

[mmartell]

Re: Xbox One Blown Mosfet

NCP4204GAC1328G, for completeness

[mmartell]

Re: Xbox One Blown Mosfet

NCP4204. I could only find the data sheet for the 4200 for which all four buck converters were wired identical save for a feedback circuit on one of them.

[stj]

Re: Xbox One Blown Mosfet

so what's the part number on that ON-semiconductor controller chip on the right in the first foto?

[mmartell]

Re: Xbox One Blown Mosfet

Here you go, hopefully they are ok.

[mmartell]

Re: Xbox One Blown Mosfet

Sure thing, bud, will get them as soon as I can.

[budm]

Re: Xbox One Blown Mosfet

Can we get good clear straight shot pictures of the board top and bottom and then the closed up of that section?
Those 5 switching circuits look to be BUCK Converter, so I would check the Diode for the output section and the filter caps too.
http://www.learnabout-electronics.org/PSU/psu31.php

[stj]

Re: Xbox One Blown Mosfet

if it's a 5phase psu,
get the part number from the controller i.c. and there may be a schematic in the datasheet.

[vinceroger69]

Re: Xbox One Blown Mosfet

Maybe send this man a message via his you tube account as he may of saw this isssue before and maybe willing too advise
https://www.youtube.com/channel/UCtf...eEY_vq_UOL4PDQ

[mmartell]

The 12v line is shorted right at the power connector. Nothing looked bad until I removed the heatsink and found a destroyed mosfet. After removal the short remains.

This component is in a bank of five identical circuits as shown in the pic. I'm getting strange reading off these, some read shorted whIle others don't. Not saying it's not possible but something tells me not to trust these readings just yet.

As this board is a challenge to work with because of its thermal mass was hoping for a little guidance. Searched for schematics but evidently there are none.

What's the best course of action ?