Power supply build quality pictorial. part 2

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

+1

I've never seen Teapos with that Jamicon-like vent and i'm not aware of TEAPO being inconsistent with the vent marks in their caps so they do look fakes to me.

I have seen that before:
https://www.badcaps.net/forum/attach...4&d=1287520598
https://www.badcaps.net/forum/attach...5&d=1287520598
https://www.badcaps.net/forum/attach...6&d=1287520598
https://www.badcaps.net/forum/attach...7&d=1287520598

[SIDMX]

Re: Power supply build quality pictorial. part 2

I have seen that before:
https://www.badcaps.net/forum/attach...4&d=1287520598
https://www.badcaps.net/forum/attach...5&d=1287520598
https://www.badcaps.net/forum/attach...6&d=1287520598
https://www.badcaps.net/forum/attach...7&d=1287520598

Oh, i see now, you are right.

And those pics remember me that i do have seen blue Teapos with those vents before in a very old compaq PSU.
Still this is my first time seeing the green ones with those vents.
Teapo used to use those vents on those dates? ...Or that was just a rare event ?

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

Maybe it is related with the merge with G-Luxon. G-Luxon use those vents.

[Behemot]

Re: Power supply build quality pictorial. part 2

Yeah Teapo and CapXon bought half of the world's crappy brands. Thats the only reason there is less of them than used to be:-D

[ncovert]

Re: Power supply build quality pictorial. part 2

Got some more units to show:

Pic 1: VERY OLD Lead Year Enterprise TG-200X 200W ATX power supply
Has a bridge rectifier and input filtering, unknown cap brands. It's so old, the 92mm fan blows into the PC case instead of the power supply.


Pic 2: Achieve AX250 250W ATX power supply
Has 4 diodes, one filter coil, "VIVA" caps everywhere. I'm guessing it's an L&C.


Pic 3: Thermaltake Purepower ISO-400 300W ATX12V power supply
Has a bridge rectifier and input filtering, JunFu caps everywhere. It's probably one of the best built Channel Well's I've ever seen.


What do you think?

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

The first one is definitely overbulit for 200W. I am impressed.

[ncovert]

Re: Power supply build quality pictorial. part 2

The first one is definitely overbulit for 200W. I am impressed.

Interesting. Do you think it could do a little more then that?

[ncovert]

Re: Power supply build quality pictorial. part 2

Got another unit in...
It's a Dell/Hipro HP-P1457F3 145W power supply from 1999. Yes, it has the goofy non-standard Dell pinout on the ATX connector. Caps are all Teapo.

[ncovert]

Re: Power supply build quality pictorial. part 2

DVE Electronic DSP-1454P 200W AT power supply
Has 4 diodes , but input filtering. Matsushita primary caps, and a mix of Jamicon and CapXon on the secondary.

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

Interesting. Do you think it could do a little more then that?

The transformer seems capable of doing 350W+. The input caps are big enough. If they are 680uF the can do 350W.

The total power depends on the switching transistors, the secondary rectifiers and the output caps.

[ncovert]

Re: Power supply build quality pictorial. part 2

The transformer seems capable of doing 350W+. The input caps are big enough. If they are 680uF the can do 350W.

The total power depends on the switching transistors, the secondary rectifiers and the output caps.

Primaries are 470uF, so what do you think it can do?
Also, how do you tell what a PSU can do by the primary caps?

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

Primaries are 470uF, so what do you think it can do?
Also, how do you tell what a PSU can do by the primary caps?

2x:
220uF ~ 100-200W
330uF ~ 200-240W
470uF ~ 240-275W
560uF ~ 275-300W
680uF ~ 300-370W
820uF ~ 370-430W
1000uF ~ 430-500W+

depending on the design

Those values are without Active PFC.

[ncovert]

Re: Power supply build quality pictorial. part 2

2x:
220uF ~ 100-200W
330uF ~ 200-240W
470uF ~ 240-275W
560uF ~ 275-300W
680uF ~ 300-370W
820uF ~ 370-430W
1000uF ~ 430-500W+

depending on the design

Those values are without Active PFC.

Thank you. Is there any way to swap out caps or would that kil it?

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

Thank you. Is there any way to swap out caps or would that kil it?

I replace primary caps with bigger ones all the time without any problem

[ncovert]

Re: Power supply build quality pictorial. part 2

I replace primary caps with bigger ones all the time without any problem

So you think I could swap out the 470uf's with 680uf's?

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

So you think I could swap out the 470uf's with 680uf's?

That psu has a label of 200W. Before changing the primary caps you should make sure how many watts the psu is capable of doing. To do that you need to check its switching transistors, secondary silicon and output capacitors.

[Th3_uN1Qu3]

Re: Power supply build quality pictorial. part 2

So you think I could swap out the 470uf's with 680uf's?

Yes.

[tom66]

Re: Power supply build quality pictorial. part 2

The rule of ~1uF/watt works well - divide by two to get uF because the caps are in series.

[pdavid]

Re: Power supply build quality pictorial. part 2

A friend brought me a Chieftec Cft-750-14c. He got it in 2007 and it wasn't opened ever since. This psu was literally stuffed with dust. The fan couldn't move and the unit was shutting off. It was easy to clean it with air compressor and a brush. Suprisingly caps look ok. Hitachi primary and Samxon secondary. Take a look at the soldering... this is how it came out from Channel Well...
I haven't touched it up since my friend was already in shock that I opened the unit up He took it back so it's going to work like this.

[c_hegge]

Re: Power supply build quality pictorial. part 2

CWT aren't exactly known for good soldering. I probably would have checked the screws for the heat sinks. CWT often don't do them up tight enough and don't use any thread lock on them.