this is why enermax liberty and noisetakers blow up!

[kc8adu]

this glue is conductive once it cooks on hot parts.
the result is leakage to the gates of these mosfets.
result..BANG!

[zandrax]

Re: this is why enermax liberty and noisetakers blow up!

Dammit! Glue can't be easily removed, I suppose: these psus are doomed to death ...

Zandrax

[i4004]

Re: this is why enermax liberty and noisetakers blow up!

well..i understand them: without those small chokes the damn thing just wouldn't work...hehe...

[kc8adu]

Re: this is why enermax liberty and noisetakers blow up!

just scrape it off and tack the beads with rtv.
just had a proliant ml370 psu go with a bang due to the same glue.
gotta rebuild it and clean out the other one in the chassis.
hey a $20 dual xeon server is gonna need work!

[gonzo0815]

Re: this is why enermax liberty and noisetakers blow up!

They probably wanted to glue the ferrite beads to avoid any vibration noise. Good idea, bad practice.

[Wizard]

Re: this is why enermax liberty and noisetakers blow up!

A good design include the bead on the wire soldered to the PCB instead on the transistor's leads. Otherwise silicon RTV on these beads on the component leads.

Nasty to see this tan-colored glue still used to this day. NASTY.

I had a monitor, I pulled components and scraped the areas clean of this. It was in use for awhile so it was more easier to chip off brown/black stuff instead of trying to tear up monitor because that damned tan glue is stronger than krazy glue!?

Cheers, Wizard

[Latoof]

Re: this is why enermax liberty and noisetakers blow up!

@ kc8adu

If for any reason you decide not to repair the Enermax, I'm looking for a PS223 monitor IC for my Enermax.

[mutant]

Re: this is why enermax liberty and noisetakers blow up!

Good to know that that the problem has been found. Now I know why mine blew up.
Thanks.

[FernandoBayard]

Re: this is why enermax liberty and noisetakers blow up!

Actually blew up ?

[mutant]

Re: this is why enermax liberty and noisetakers blow up!

Actually blew up ?

A loud pop, sparks and lots of smoke. I did take it out of the pc after it tripped the circuit breaker. I plugged in an ATX power supply tester and as soon as I turned it on - Poof!

[Philly Cheese Steak]

Re: this is why enermax liberty and noisetakers blow up!

Damn I got two Galaxy's, I'm wondering if I should examine them? I'd hate to have this happen to me. They are good with warranty work, they have done the same PSU for me about four times.

[370forlife]

Re: this is why enermax liberty and noisetakers blow up!

These are older enermax's, new ones do not suffer from the same conductive glue.

[japlytic]

Re: this is why enermax liberty and noisetakers blow up!

I don't like that glue at all. It takes a lot of effort to remove completely.

[Ramjet]

Re: this is why enermax liberty and noisetakers blow up!

Hi all, just ran into a 620 watt Liberty that tests ok with a power supply tester, but fails to boot the PC. Debating if it's worth trying to fix before the sparks fly or just scrap it. A new Corsair CX600 is only $40 after rebate, any thoughts if cleaning off the glue and recapping would make it trustworthy again?

[Latoof]

Re: this is why enermax liberty and noisetakers blow up!

The tester puts a hard short on the PSU pin /PS_ON (14 or 16 depending on 20 or 24 pin connector) to ground which pulls the +5V down low enough to cause the power on. If you measure this pin during the power up you will likely see that the voltage does not drop far enough - needs to go below 0.8V to power up. I'm guessing but I suspect that there is a resistor in the PSU that is between the /PS_ON pin and the actual input to the switching device, and that it is out or spec (high resistance) causing the sense voltage to be too high... but that's just a theory in the absence of a circuit diagram

THIS LINK may be worth a read..

I have seen this with certain MoBo before and in fact my Enermax and MoBo combo intermittently suffer this.... I have just replaced the PSU with a new Seasonic 850W

[Behemot]

Re: this is why enermax liberty and noisetakers blow up!

I have yet another of the units with clicking primary. I've replaced the film cap, the MOV, the input cap and the PFC choke from similar scrapped Enermax unit, still does it. And I am not sure if this is quite normal, but there is 136 volts on the primary heatsink against earth ground.

There is almost no glue at all in this unit and most of it is on secondary. Nothing really on primary silicon. Maybe some of the primary silicon is bad, or insulation tab between them and the heatsink?

[Behemot]

Re: this is why enermax liberty and noisetakers blow up!

Been also thinking whether it may be some leaking ceramic cap or something. The ground behind rdectifier may be somewhat flotaing over the earth ground because of that and have higher potential. Bu I guess I will have to start with removing the heatsink and cheking all the silicon and insulation tabs/O rings…?