Need help with Antec TruePower2.0 380W

[momaka]

Re: Need help with Antec TruePower2.0 380W

Thanks.
Still kind of hard to tell how each capacitor is connected, though. I would guess it's the 22uF 50v one, but at this point it could be any of the three actually. So it's probably a good idea to replace all 3 capacitors while you're there. That part of the circuit is hot-spot too so I'm pretty sure all three caps there have been well cooked by now.

[goodpsusearch]

5vsb: 5.27v

I just put out antec psu from my computer to recap it...

Prior to recapping I powered on psu, sorting power on with ground, without anything connected to it. The psu made a sound that was getting louder and louder and the 5vsb voltage was getting higher and higher... I swiched it off when it reached 5.27v. wtf? is it worth recapping or it has other problems I cannot repair?

How can it act like this but when connected with my pc be in 3% range?

[PCBONEZ]

Re: Need help with Antec TruePower2.0 380W

Either:
- It's not regulating properly because there is no load on it.
- Or, a bad cap is screwing up the +5vsb regulation and when it's connected to mobo some cap on the board is compensating for bad cap in PSU. That will probably eventually kill the cap on the mobo too [by over working and over heating it] and when it blows you'll probably have a dead mobo with a blown chipset.

PSU should be fine after a re-cap.
.

[goodpsusearch]

Re: Need help with Antec TruePower2.0 380W

I have recapped 5vsb caps, 12V, 5V, 3.3V output caps.

Oh, and,

In that one those 4 caps you marked are laid out differently but they are:
2x 1000uF-10v-8mm
1x 220uF-16v-6.3mm
1x 470uF-25v-8mm
- Probably the same but no guarantees.
.

The unknown cap was indeed 1x 470uF-25v-8mm and it was replaced too, thank you for the help

I am waiting some more caps ordered from rs, to replace:

1x1uF 50V Koshin
1x22uF 16V Fuhjyyu
1x22uF 50V Koshin
1x100uF 25V Fuhjyyu
1x220uF 16V Koshin

In the meanwhile I am concerned about the psu fan. It is thermally controlled and usually it spins at 1100 - 1250 rpm which results in psu running really hot inside. Is there any way to make it run faster? Do you know the exapt point the thermal sensor is?

When fan connected directly at +5v it is running too slow, ~800rpm.
When running at 12V it was cool, 1280rpm, but way too loud...
If only there was a way to make the thermal controller more aggresive.

[etnietering]

Re: Need help with Antec TruePower2.0 380W

The sensor is most likely bolted to one of the heatsinks, with 2 wires coming out of it. Most of the ones I've seen are little green blobs. This is a thermistor, a resistor who's resistance depends on the temperature. Depending on the particulars of your system, you should be able to put a resistor either in series or parallel with this to change the aggressiveness of the fan controller. I remember there being a discussion about that someplace on this forum a while back. Lots of people here can help you with the math if need be.

An alternative would be replacing the fan with one that pushes more air at a lower voltage, but that may or may not be an option.

[PCBONEZ]

Re: Need help with Antec TruePower2.0 380W

If you need to move the same air with less noise then you need to change the fan.

A fans flow depends on: Diameter, RPM, blade pitch [angle], blade width [indirectly how 'thick' the fan is], and number of blades.
Less RPM with a thicker fan [wider blades] or with more blades might get you to the same air flow with less noise.
.

[goodpsusearch]

Re: Need help with Antec TruePower2.0 380W

If you need to move the same air with less noise then you need to change the fan.

A fans flow depends on: Diameter, RPM, blade pitch [angle], blade width [indirectly how 'thick' the fan is], and number of blades.
Less RPM with a thicker fan [wider blades] or with more blades might get you to the same air flow with less noise.
.

I thought of buying another fan, but it is a bit pricy for me.

Somewhere I have heard that if combined, 12V and 5V can result in 7V which I can connect directly to the fan, or 12V and 3.33 for 8.67V. How can this happen?

The sensor is most likely bolted to one of the heatsinks, with 2 wires coming out of it. Most of the ones I've seen are little green blobs. This is a thermistor, a resistor who's resistance depends on the temperature. Depending on the particulars of your system, you should be able to put a resistor either in series or parallel with this to change the aggressiveness of the fan controller. I remember there being a discussion about that someplace on this forum a while back. Lots of people here can help you with the math if need be.

There are 2 green bulbs on the heatsinks as marked at the photos. The problem is they are soldered directly to the board, no wires, so it would be difficult for me to mod it..

[PCBONEZ]

Re: Need help with Antec TruePower2.0 380W

Somewhere I have heard that if combined, 12V and 5V can result in 7V which I can connect directly to the fan, or 12V and 3.33 for 8.67V. How can this happen?

Doesn't work like that. Not even close.
No such thing as 'combining voltages'.
What you would get are sparks, smoke, and maybe fire.

[POM_MJ]

Re: Need help with Antec TruePower2.0 380W

I've found molex mod connector for fan, and tried by myself.
It can do that, ex.
YELLOW+12V-----> FAN+ [] FAN- <-----RED+5V this will get FAN voltage ~7V
YELLOW+12V-----> FAN+ [] FAN- <-----ORANGE+3.3V this will get FAN voltage ~8.7V

Try search "molex 7v" on google

[PCBONEZ]

Re: Need help with Antec TruePower2.0 380W

That's not "combining voltages", that's floating the ground.

[PCBONEZ]

Re: Need help with Antec TruePower2.0 380W

Not sure why anyone would bother with that when a new fan is under $3.
http://www.allelectronics.com/make-a...C.-Fans/1.html

[goodpsusearch]

Re: Need help with Antec TruePower2.0 380W

Are you sure the 7V mod is unsafe?

120mm fans at rs are over 20 euros each and 4 euros for the postal service (nice song btw).

I could search at Thessaloniki for fans, but I am not sure this will work. See why:
1) I buy a more powerful fan and replace the original.
2) When I power on antec, the fan does not spin at all with low voltage, or it spins, so the psu gets cooler than with the original fan and the fan controller lowers even more the fan volts and stops the fan or keep it working but cooling better than original fan.

Where is the fault at this thought?

[i4004]

Re: Need help with Antec TruePower2.0 380W

as pom said, search google
http://www.procooling.com/index.php?...ticles&disp=54

>It is thermally controlled and usually it spins at 1100 - 1250 rpm which results in psu running really hot inside.

at which voltage?
if for example it's doing 7v already, then you gain nothing by using 7v "from molex".

also, why do you have to buy a fan at rs if it has such a ridiculous price?
nobody in greece carries fans? i find that hard to believe.
usually pc shops(and webshops) have fans.
offcourse, cheapest will also be worst quality, but 20eur is just silly...

btw. how did you figure out psu is overheating? you're aware that human perception of "hot" would happen on even as low as 40°c, and that's not really hot at all.
measured it with thermometer?

[goodpsusearch]

Re: Need help with Antec TruePower2.0 380W

at which voltage?
if for example it's doing 7v already, then you gain nothing by using 7v "from molex".

4-5V

btw. how did you figure out psu is overheating? you're aware that human perception of "hot" would happen on even as low as 40°c, and that's not really hot at all.
measured it with thermometer?

It Is indeed overheating. The proof is the board discoloration at more than one spots (and it is visible from both sides) and the resistor that got out it's coating from heat (see photos at first posts).

One more proof is that if I disconnect and open it immediately, the heatsinks are so hot that it's impossible to touch, they could cause burn if you touch them for more than a sec.

[Krankshaft]

Re: Need help with Antec TruePower2.0 380W

Those char marks near the standby transformer are the result of the BAD CAPS not overheating.

[Krankshaft]

Re: Need help with Antec TruePower2.0 380W

If the caps were caught earlier the darkening could have been avoided. I caught one of my Antecs before cap failure and it had no board darkening.

I don't see why you're reinventing the wheel here I did no fan mods on my 4 Antecs they run quietly 3 of which run 24/7. If you want to turn the PSU into a leaf blower all to you. The reason I bought my first Antec was because I wanted a quiet PC.

The TP 2.0 on my server doesn't even get hot enough to kick on the rear exhaust fan when the computer isn't being stressed.

You also are aware of the thickness of the fans right? I believe the rear exhaust fan is a standard 80mm thickness but the other fan that's always on is a slim 80mm.

[i4004]

Re: Need help with Antec TruePower2.0 380W

as krank said, discoloration is not a proof, those are remains of things that were because of old badcaps....

as for hot to the touch, like i said, what we perceive as too hot may as well be normal operating temp.

here is what i would do:
1-check the temperature with thermometer...
2-if too hot(and range from 40-60°c i wouldn't call hot at all), first check the fan supply circuit(if it's always on 5v it's not working right..should be measured while it's on), if ok, replace the fan, recheck the temp

one more thing: but your heat perceptions are based on the psu while it was working with badcaps, right?
you didn't try it with new caps, as these didn't arrive yet.

i would first recap, then worry about the heat, if problem persists.
but i think chances are good there's no problem there.

[POM_MJ]

Re: Need help with Antec TruePower2.0 380W

I agreed with i4004, heat could came from badcaps, very leakage caps.
firstly replace them with good caps, then recheck.

[goodpsusearch]

Re: Need help with Antec TruePower2.0 380W

as krank said, discoloration is not a proof, those are remains of things that were because of old badcaps....

as for hot to the touch, like i said, what we perceive as too hot may as well be normal operating temp.

here is what i would do:
1-check the temperature with thermometer...
2-if too hot(and range from 40-60°c i wouldn't call hot at all), first check the fan supply circuit(if it's always on 5v it's not working right..should be measured while it's on), if ok, replace the fan, recheck the temp

one more thing: but your heat perceptions are based on the psu while it was working with badcaps, right?
you didn't try it with new caps, as these didn't arrive yet.

i would first recap, then worry about the heat, if problem persists.
but i think chances are good there's no problem there.

ok

Just to know, my main pc is noisy enough already, because of the cpu (athlon XP 1667 @ 1800MHZ) and cpu cooler, running at 3500rpm, so raising the fan speed into reasonable levels would do no harm at all.

I just wanted to make it run a bit faster. I tested the fan at 7V and it was not audible at all. But after reading some articles over the net I don't like the idea of mixing different volt rails anymore.

So I will complete the recap as soon as I recieve the damn last caps from rs and then check temp and fan speed. If not satisfied, I will replace the fan with one that runs cool and quiet at 12V or 5V and skip fan controller.

I still find hard to believe that this was done due to bad caps..

The TP 2.0 on my server doesn't even get hot enough to kick on the rear exhaust fan when the computer isn't being stressed.

You also are aware of the thickness of the fans right? I believe the rear exhaust fan is a standard 80mm thickness but the other fan that's always on is a slim 80mm.

My antec has only 1 120mm fan that blows air from pc case inside the psu:

[PCBONEZ]

Re: Need help with Antec TruePower2.0 380W

Your gripe was that the fan is too loud.
I've never thought of those as having loud fans.

Suspect caps problems are screwing the fan control or causing heating such that the fan is running too hard.
.