Repair a custom form atx posee suply

[ehrja]

Hello Im trying of repair a customized form factor atx poder suply wich is from a DVR the model of this power suply is ENP-2320 and is really crowded in electrónica an also is really small

The síntomas: fuse blown I already take out a MOSFET k2611 from toshiba wich was un short circuit but only the 5vsb is feeding

I'll try to find the problem

Sorry forma the por inglish Im wrigthing from muy new celphone.

Hope someone can helpme to find the problems if I can't

[stj]

Re: Repair a custom form atx posee suply

check everything the fet connected to, there are usualy resistors that burn.
also, was the fet's GATE pin shorted to the other pins?
if it was then the control circuits will be damaged.

the other thing to think about is why the fet died,
i would check the bridge rectifier and remove & test the main capacitor.
last time i saw a bad fet, the main cap had leaked under the can onto the board.

[ehrja]

Re: Repair a custom form atx posee suply

Ok I'll checo that luky I have other power suply wich has diodes burned.

That is true all the pins un the MOSFET was ushorted an obiously the controlar board of the MOSFETs must be damaged I'll check that

Thank you for your answer.

[ehrja]

Re: Repair a custom form atx posee suply

This big cap is good it reads 105 uf ESR 0.26, I'm not shure about the big resistor which reads 0.4 hom

[stj]

Re: Repair a custom form atx posee suply

sounds o.k. it's probably inline with the gate pin.

[Stefan Payne]

Re: Repair a custom form atx posee suply

if you can't fix this unit:
It's a standard Flex ATX PSU, sometimes you can find similar things as 1HU server thingys...

[ehrja]

Re: Repair a custom form atx posee suply

if you can't fix this unit:
It's a standard Flex ATX PSU, sometimes you can find similar things as 1HU server thingys...

I'm actually wondering if at last this power supply could be changed by a generic if not can be saved.

I mean this power supply has the same voltages and connectors as a generic one. Just to find the way to Short the height of the tallest components that must be the heatsinks.

I read an article that talk something about feeding the output whit an other power supply in order to check the secondary section or the regulated low voltage. Is it posible to do without damaged components?

[ehrja]

Re: Repair a custom form atx posee suply

sounds o.k. it's probably inline with the gate pin.

is not it has a big black crack in the hidden side.

however I notice that all semiconductors in the secondary side are shorted beter no to follow with this one.

And I better check on the other PS, is the same model the problem almost the same just the 5vsb are on and when I pluged the atx tester all voltages are on for about half a second.