Supermicro PWS-0060 *failure*, please advise

[Super Nade]

Re: Supermicro PWS-0060 *failure*, please advise

When you open it up, do you see any bad soldering?

[kc8adu]

Re: Supermicro PWS-0060 *failure*, please advise

i have seen a few liteon units with very poor soldering.
fixed a neighbors liteon and when i pulled the pcb i commented it looked like a 2 year old with a cold iron and plumbing solder had built it.
he commented that it looked like a mud dauber had been working on it.
had one in a hp that had missing +3.3
bad solder joints and crap caps.
stay tuned for a ablecom dissapointment i got in last week.looks like a deer board inside!

[Super Nade]

Re: Supermicro PWS-0060 *failure*, please advise

Wow man...doesn't look like the insides of my unit?

The winding on the toroidal inductor, in the last picture is just garbage. Who-ever winded that coil should be shot.

[PeteS in CA]

Re: Supermicro PWS-0060 *failure*, please advise

If the +3.3V O/P is mag-amp regulated, it sounds like the transistor driving the mag-amp inductor is either shorted or turned full on by whatever is driving it.

[arneson]

Re: Supermicro PWS-0060 *failure*, please advise

commented that it looked like a mud dauber had been working on it.!

Ha hahaha, does everyone know what a "mud dauber" is? Ha haha

[tiresias]

Re: Supermicro PWS-0060 *failure*, please advise

Ha hahaha, does everyone know what a "mud dauber" is? Ha haha

LOL Arneson.

I always thought it was one of these wasps but now you simply *have* to tell me what I'm missing

[tiresias]

Re: Supermicro PWS-0060 *failure*, please advise

If the +3.3V O/P is mag-amp regulated, it sounds like the transistor driving the mag-amp inductor is either shorted or turned full on by whatever is driving it.

Both the 3.3v and 5v have sense wires running back from the EPS connector to the PCB - can we assume that both be mag-amp regulated, or is something else at play here?

[PeteS in CA]

Re: Supermicro PWS-0060 *failure*, please advise

T, I don't have specific knowledge of this P/S, but unless it's a fairly high-end supply, I'm assuming it has a single main regulator, usually sensing the +5V and +12V. The other O/Ps are post-regulated - the -5V (if it has it) and -12V by 3-T regulators and the +3.3V by a mag-amp regulator.

The winding on the toroidal inductor, in the last picture is just garbage. Who-ever winded that coil should be shot.

Winding toroidal inductor with multiple windings with different numbers of turns and different wire gauges is seldom neat; making 10s of thousands of inductors a month is no mean task, either.

[tiresias]

Re: Supermicro PWS-0060 *failure*, please advise

Thanks Pete for your advice... I'll be taking a look at it more closely now - componentwise it really seems *very* solid, I'm expecting a poor solder joint somewhere or other soldering-related issue as KC8 warned.

Winding toroidal inductor with multiple windings with different numbers of turns and different wire gauges is seldom neat; making 10s of thousands of inductors a month is no mean task, either.

The inductors on my unit aren't badly wound at all, in fact. It's probably luck of the draw, as you said.

[arneson]

Re: Supermicro PWS-0060 *failure*, please advise

*have* to tell me what I'm missing

The bug is not so funny, but the nest is a big wad of crap, filled with larvae.
I'm still LOL.

[jonnyGURU]

Re: Supermicro PWS-0060 *failure*, please advise

No comment on the inductor windings since I've seen a lot worse on a lot more expensive units.

As long as there's no "slack"....

[Super Nade]

Re: Supermicro PWS-0060 *failure*, please advise

Guys, this is my first server unit. Any ideas on why there is no power switch? I'm still a bit bummed by this.

[tiresias]

Re: Supermicro PWS-0060 *failure*, please advise

Guys, this is my first server unit. Any ideas on why there is no power switch? I'm still a bit bummed by this.

Hehe... because servers shouldn't be turned off?

It can be annoying, yes. I had a separate switch on my surge suppressor for the socket to which I connected it so it wasn't really a problem. Perhaps you could do the same?

A question: does your 0056 model also have the fan running (at low speed) all the time, even when it's only providing 5Vsb?

[jonnyGURU]

Re: Supermicro PWS-0060 *failure*, please advise

Hehe... because servers shouldn't be turned off?

It can be annoying, yes. I had a separate switch on my surge suppressor for the socket to which I connected it so it wasn't really a problem. Perhaps you could do the same?

A question: does your 0056 model also have the fan running (at low speed) all the time, even when it's only providing 5Vsb?

I can answer that: Yes. The fan runs all of the time. Fire up the PC and it spins full RPM for about two seconds and then comes down to a bout 75% RPM.

[Super Nade]

Re: Supermicro PWS-0060 *failure*, please advise

Roger that. Exactly as Jonny said. It is whisper quiet, when compared to my x1800xl's scramjet HSF. That thing (x1800xl) is so loud at start up that I could hear it outside my lab.

Jonny, do you think I would trip something up if I unhook the fans and rewire it so that both fans are being used? This redunantant fan stuff is not my style. If there is a fan I see, it should be spinning. I hate lazy ass fans.

[jonnyGURU]

Re: Supermicro PWS-0060 *failure*, please advise

I actually took one of eVGA 7800GTX's out of my machine simply because of noise. I'm eventually going to water cool the other.

[Super Nade]

Re: Supermicro PWS-0060 *failure*, please advise

How long have you had the GTX? Maybe you can step it up to the 79xxx ?

[tiresias]

Re: Supermicro PWS-0060 *failure*, please advise

About the revision question:

I see where yours has "REV 3.0". My unit has nothing there, ie. just white space on the label.

[Super Nade]

Re: Supermicro PWS-0060 *failure*, please advise

Fake! Fake Fake!!!



Another very very strange thing I noticed. The 12V line dropped to almost 0V for a fraction of a second, when I rebooted the now OC'ed Prescott !!

Config:
1 stick of 1Gb DDR2
1 7800GT
1 Presscot @ 1.5125V VCore, 4160 MHz.

WTF is going on here?

[tiresias]

Re: Supermicro PWS-0060 *failure*, please advise

Another very very strange thing I noticed. The 12V line dropped to almost 0V for a fraction of a second, when I rebooted the now OC'ed Prescott !!

Surely it would have gone out had that been the case? Are you sure your multimeter/oscilloscope connection didn't come loose for a moment?