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**Per Hansson** · 10-05-2007, 12:23 PM

Re: Truepower 2.0 recap and repair

The 4700uF caps you will need to replace with 3300uF

4700uF caps in D10mm do not exist from reputable brands (it's ok anyway because those crap Fukkhju caps prolly don't even deliver 3300uF when new!)

Someone else will need to answer the other questions... However it should not be dangerous to increase the voltage of the diode, just good... (as long as you can fit it, keeping in mind lead-size)

**Kaine** · 10-05-2007, 01:02 PM

Re: Truepower 2.0 recap and repair

well the 400V diode has thinner leads than the original one, so we'll see how i do. I'm not afraid to drill out the lead holes if i have to either. I think i'll go for the 600V, it should be a good fit with the current holes and the PSU should not have anything over 550V in it anyway, so it's the right number. Not like they're expensive.

Just remembered too- i'm not sure i made a record of which way the diode was placed polarity wise. i should be able to work it out from my photos, but again, a positive confirmation on it would be great if anyone happens to have photos or a Truepower in peices atm.

**gonzo0815** · 10-05-2007, 08:59 PM

Re: Truepower 2.0 recap and repair

This diode does not seem to be a 1N400X diode. From the pic it seems to be rather large and with to big leads.
The visible code does not indicate 1N400X either.
I would assume, that this diode is something in the 6 to 8A region with that thick leads.

If you lock at this

http://pdf1.alldatasheet.com/datashe...I/UCC3818.html

datasheet, you may find a basic application circuit for an 250w APFC stage.
Most diodes are 6A one is 8A, so i think if no one could help you, with the detailed marking of the original type, i would certainly not start with a 1A rated 1N400x diode.

A higher voltage would probably be far better, as from my point of view 400v for an 220v capable device is far to low for silicon devices.
Sure, i am not an expert and not familiar, with any safety concerns, a higher voltage diode would imply.
But i know from some stability tests, where an 2500v pulse is introduced at the line wile the psu is on duty.
Most PSu`s have had no problems with this test, they simply shut of and come back after a restart.
But a IMHO one APFC unit was dead after this test.
It was a PSu test in the German C`t magazine.

**linuxguru** · 10-06-2007, 01:08 AM

Re: Truepower 2.0 recap and repair

My guess is that the diode is an FR307 or similar flyback rectifier in the auxiliary supply. You can use any fast-recovery or schottky rectifier with the appropriate current and breakdown voltage specs. The 1n4007 or similar probably won't be reliable, long-term, in this application.

**Kaine** · 10-06-2007, 08:05 AM

Re: Truepower 2.0 recap and repair

thanks a lot guys, this is exactly the kind of info i needed. I'll get with the research and see if i can confirm what sort of diode i need.

**Kaine** · 10-06-2007, 08:27 AM

Re: Truepower 2.0 recap and repair

The markings i can read off the diode are:

P6KE2*** (can't read last 2 or 3)
5369 - not entirely sure the second two digits are right.

Google has been unhelpful. This diode is marked as D20 on the circuit board (irrelevant) and is connected in series with another 2 or 3 smaller ones alongside the yellow transformer seen above. Really hitting a bit of a wall as to what to replace it with.

**linuxguru** · 10-06-2007, 01:31 PM

Re: Truepower 2.0 recap and repair

Then it's a P6KE200 or similar surge supressor - basically a high-voltage zener. That's often used in conjunction with a TOPSwitch power-converter IC in the auxiliary supply, to protect/snub the MOS switch device in the TOPSwitch.

**Kaine** · 10-06-2007, 08:46 PM

Re: Truepower 2.0 recap and repair

Originally posted by linuxguru

Then it's a P6KE200 or similar surge supressor - basically a high-voltage zener. That's often used in conjunction with a TOPSwitch power-converter IC in the auxiliary supply, to protect/snub the MOS switch device in the TOPSwitch.

sounds like a winner. i'll see if i can dig one up.

*moments later*

we have a winner

I'm taking the 600W version over the 500W version, makes more sense since the PSU itself is rated at 550W (530W is actual max). Off to the aussie motorbike show in melbourne, will be back with an update later!

Thanks a heap linuxguru and gonzo, you've probably saved me a hell of a lot of time and heartache.

Now are we positive that i can use 3300uF 16V 10mm caps in place of the 4700s? I still can't find 10mm 4700uF anywhere.

**Sparky** · 10-06-2007, 09:13 PM

Re: Truepower 2.0 recap and repair

Is there room to cram a 12.5mm 4700uF in there? In the one antec I recapped the original fuhjyyu was 10mm but the silkscreen was sized for a 12.5mm cap so it fit perfectly.

**Kaine** · 10-07-2007, 08:47 AM

Re: Truepower 2.0 recap and repair

fraid not. i'd take a photo but my camera has suddenly decided to pack it in =< go figure. They fill the marking on the PCB and to the best of my measuring abilities are 10mm (ordering some calipers tonight)

**Sparky** · 10-07-2007, 01:36 PM

Re: Truepower 2.0 recap and repair

If there is no way to stuff a 12.5mm cap in there the 3300uF 16V cap should be fine. Many of the truepowers I recapped had that size in them on the 12V rails. Only one or two antecs I did had the 4700uF 16V.

**Kaine** · 10-07-2007, 10:44 PM

Re: Truepower 2.0 recap and repair

thanks man, i'll do that. just have to find a place in australia that sells the samxon 10mm 3300uF 16V now. I see them on the badcaps site, but no international shipping

If i must i'll just wait until my mate has got a place over there and i'll send them to him to forward on to me.

**gonzo0815** · 10-08-2007, 07:37 AM

Re: Truepower 2.0 recap and repair

Contact Joe, AKA bigpope (a member of this forum). He will sell it to you.

**acstech** · 10-09-2007, 08:45 AM

Re: Truepower 2.0 recap and repair

So wait a minute here, Antec used 10v caps on the 12v line? That doesn't make much sense.

**Kaine** · 10-09-2007, 08:55 AM

Re: Truepower 2.0 recap and repair

Originally posted by acstech

So wait a minute here, Antec used 10v caps on the 12v line? That doesn't make much sense.

looks like it. there's 4 4700uF and 2 3300uF. i'm guessing that's 2 caps per rail, except the 3.3v (not filtered? my power supply design theory is sketchy at best)

doesn't make much sense to me. Next on the chopping block is my OCZ which has a little more ripple on its rails than i'm comfortable with. or maybe it's my motherboard? questions i can hopefully answer once this PSU is done and i can replace the OCZ with it for a solid comparison.

**acstech** · 10-09-2007, 10:04 AM

Re: Truepower 2.0 recap and repair

I dont know how similar it is, but I have a Truepower 2.0 430w that I have already recapped. It had the same caps as your 550w. From looking at the wires and circuits under the board, it looks like the 2x 3300uf 16v caps are on the 12v rail, and 2 of the 4700's were on the 3.3v rail, and the other 2 4700's were on the 5v rail.

When I recapped mine, I put 3300uf 10mm 6.3v caps back in for the 4700's, and it's been working fine. Now I had to use Panasonic NHG (not recommended due to being GP) but it has been working fine. I figure they cant be worse than Fuhjyyu's. The two 3300uf 16v replacements I used 12.5mm caps, which I did manage to cram in there.

Here's a pic, if it helps:

http://i231.photobucket.com/albums/e...tech/TP430.jpg

**Kaine** · 10-09-2007, 11:31 AM

Re: Truepower 2.0 recap and repair

thanks man, that makes more sense. I should've picked it by looking at the board. oh well.

Looks like we have essentially the same board layout. In fact i reckon they use the same board and just up or down-spec the components as required. I have less room around those caps because the coils are a bit bigger. That area of the board is pretty cramped. props for the pic.

**Kaine** · 11-12-2007, 05:13 AM

Re: Truepower 2.0 recap and repair

Thread resurrection!

Ok so i'm so close to finishing this i can feel it. There was a problem with the dispatch of the last batch of caps i needed so it's taken aaaaages but they're finally here. Now i just need to find a replacement fuse

far as i can tell it's an M205 12A 250V ceramic (i broke it getting it out, so no pics)

Can anyone confirm for me if it would be a slow blow/fast blow, if i will have any problems with a glass replacement and whether i could get away with 10A in a 550W supply? 12A fuses are like hens teeth here, particularly in the ceramic cartrige variety. The only place i've been able to find an exact replacement is at a specialist fuse dealer but minimum buy is 30 at a cost of about $35 with tails

**Per Hansson** · 11-12-2007, 02:03 PM

Re: Truepower 2.0 recap and repair

10x110v = 1100w

Need more clarification? :P

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