Schematic for Antec Truepower 330 and other PC PSU's

[redwire]

I need a schematic for an Antec Truepower 330. I was recapping it and got mixed up, as a 47uF tested 200uF and one burnt. If anyone has some scribblings it would be appreciated.

While searching, I found many PC power supply schematics at this site, although it is Russian, there is good stuff here:
http://electro-tech.narod.ru/schematics/power/comp.htm
Especially many 5VSB schematics, good bad and ugly.

[Toasty]

Re: Schematic for Antec Truepower 330 and other PC PSU's

Welcome to the forums redwire.

Best wishes on schematics. Not likely unless someone happened to draw one of that model. All are proprietary and not released. Remember, these units are considered "not serviceable" and schematics would be "in-house" only.

Best bet here is to photo your unit's board(s) top down and some side angle shots and post here. The unit is probably similar to the 300w or 350w TruePower units and parts were -usually- the same or similar.

Indicate what you need in the pictures and see what the people here can tell you.

Toast

[redwire]

Re: Schematic for Antec Truepower 330 and other PC PSU's

Thanks Toasty, here's some pics of the PSU, with somes caps taken out.
The one cap I'm not sure about is C38, part of RC network on TL431 cathode-reference that appears to monitor 3.3V rail. It might be 10uF 50V? with 3k6 in series. The fan control transistor baked it.
If anyone can take a look in their junkbin, that will help

[Toasty]

Re: Schematic for Antec Truepower 330 and other PC PSU's

1uF 50v

That's on a TPII-480 Blue with C38 in the same position. In these they moved the fan control to a small daughterboard.

Let's see how close they match:

From the bottom on pic # 3:

- Just below the 5v wire bundle should be a 1uF @ 50v, 5x12
- Just above the 5v bundle should be (4) 4700uF @ 10v, 10x35
{the lower 2 and the black wrapped coil are the 5v pi filter}
{the upper 2 and the "bare" coil are the 3.3v pi filter}
- Above and left a bit is C38, 1uF @ 50v
- Above the fan control transistor are (2) 3300uF @ 16v, 10x35
{they are with the coil above them forming the 12v pi filter}

Make sure you replace all the Fuhjyyu caps on that board. There should be a 10uF @ 50v cap down near the mains caps that is -critical- to the 5vsb circuit. It's right on the board edge. If it fails, the 5vsb will fail and take the mobo with it.

Seems silly to chase such small caps, but this manufacturer is Krapola.

HongKongFlyApart Co., LLC ®, is actually better.

Toast

[redwire]

Re: Schematic for Antec Truepower 330 and other PC PSU's

Okay, that's pretty close, the TP330 is a CWT-550AD with some smaller parts (i.e 3300uF vs 4700uF, and 1650uF vs 3300uF).
Your notes help a lot, everything matches except cap C3 (on the board corner near the mains caps) I have as a 1uF/50V that traces back to the PWM IC soft-start.
So I'm still wondering where the 10uF cap came from. Never watch TV or answer the phone when recapping...

What do you have on the PCB corner by the 5VSB/-12V wire bundle?
On the top edge, near heatsink 1000uF/10V C19 then C37, C7. Below C19 there is C31 and then C32 by the big inductor. I had 100uF and 220uF for these.

[Toasty]

Re: Schematic for Antec Truepower 330 and other PC PSU's

>>Never watch TV or answer the phone when recapping...<<

LOL Actually, making a cap map is what you should do as you pull them.

>>What do you have on the PCB corner by the 5VSB/-12V wire bundle? <<

That's where mine differs. 5vsb, fan control, and the others come off the daughterboard that I mentioned before. I can't help there.

I am surprised no one else has chimed in here...
I'm certain more than one of these has been recapped by a member or two.

Toast

[PCBONEZ]

Re: Schematic for Antec Truepower 330 and other PC PSU's

The smallest TP I remember seeing was a 400 or 450 and as you said they as different.
I've seen smaller SP's but not TP's.
.