Power supply build quality pictorial. part 2

[TheLaw]

Re: Power supply build quality pictorial. part 2

Well this thread has been inactive for a while - I think I'll awaken it with a new find of mine

I got 20 of these on ebay for 19 dollars. Not a bad deal, eh?
Hitek T6000PSU-540
5v - 10A
12v - 1.5A
60W max

Seems to me to be pretty good quality (especially since each one only cost a dollar!) The primary cap is a Hitachi HP3, and all the other electrolytics are NCC KY. Here's an overall shot:


It has an extremely complete input filter (better than the ones on quite a few ATX power supplies I've seen...) consisting of 2 X caps (and a spot for a third), 2 Y caps, 2 dual coils, another coil on the Hot line, a current inrush limiter, a fuse, and an MOV. One X cap is 0.1uF, and I can't read anything on the other, but it's probably 0.33uF or 0.47uF. The Y caps are 4700pF. It has a real bridge rectifier, too, which is rated for 4A @ 600v. The primary cap is 120uF @ 400v. Main switcher is a NEC 2SK2141, N channel MOSFET rated at 6A continuous, 24A pulsed, 600v. Here's a shot of the primary side:


It has 2 outputs: 5v and 12v. Makes it perfect for something that has both 5v logic and a 12v motor or something. Anyways, each output has a dual-diode pack. The 5v has a TO-247 package S30SC4M schottky, rated for 30A @ 40v (the rail is rated at 10A), and the 12v has a TO-220 package STPR1020CTP super fast, rated for 10A @ 200v (the rail is rated at 1.5A). Talk about overbuilding! Wow! Each rail also has a full PI filter. The 5v rail gets 2x NCC KY 3300uF @ 10v 12.5mm caps, and the 12v rail gets 2x NCC KY 1000uF @ 16v 10mm caps. Each also has a 100nF ceramic cap right up against the connector. Here's a picture of the secondary side:


I didn't take a picture of the bottom, but the soldering is nearly flawless. There's one part where it looks like there's a little bit too much solder, but it's not causing any problems. It has a 10 pin output connector - 2 12v's, 4 GNDs, 3 5v's, and one that's not connected. Overall, it looks like a very well made unit to me! And it comes with the IEC C14 power connector attached! Definitely good for all sorts of projects What do you guys think?

Great Deal! Hmm...I think I'm going to go rummage through my old PSUs and see what I can find.

[Gianni]

JJ-400ppga

Here a 400W PSU made by Jou Jye Electronic.
I have recapped it because it looks well built, it has a passive PFC, a complete input filter, I forgot to take a pic of the case where another small PCB has another part of the input filter.
I replaced all Capxon with Samxon, Rubycon and 2 Teapo, I left the 2 Jun Fu on the input.
I checked the replaced caps: most of all were good, only 2 small caps 2,2uF 400V were completely ruined, I replaced them with Teapo... I had no other caps with such values.
To be honest I didn't understood why there are those 2 caps: they are connected at the input bridge, between + and -, with 2 diodes and one 2 resistors and the common point is connected on one AC input pin of the bridge. It looks like a kind of "input filter".

Here some pics.

Ciao
Gianni

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

I am familiar with these power supplies. In fact I can have as many as I want for free, thanks to the 5vsb Capxon caps that always fail and make the psus not work anymore.

The circuit you mention seems to be a voltage booster.
Here is a schematic I made:
https://www.badcaps.net/forum/attach...9&d=1268165068
https://www.badcaps.net/forum/attach...0&d=1268166583

I think that the best thing to do is remove completely those 2.2uF 400V caps. They get really hot because of the resistors and it is a matter of time to fail, regardless what brand they are.

By removing them, you disable that circuit and the power supply gets noticeably cooler.


Discussion, photos and more info about Jou Jye psus here:
https://www.badcaps.net/forum/showpo...2&postcount=66
https://www.badcaps.net/forum/showth...?t=8171&page=6

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

This should be same with yours:
https://www.badcaps.net/forum/showpo...&postcount=116

[Gianni]

Re: Power supply build quality pictorial. part 2

goodpsusearch the circuit is identical!!!

I thought it was a kind of filter due to the passive PFC.
It will be very interesting to know the right reason why they put this circuit, I can't see any good reason.

from your post I read:

There was much heat coming from the resistors and diodes after bridge rectifier and when measuring DC voltage, I got 350-360V!!!
This is way above normal DC voltage generated after bridge rectifier in a typical psu.

So, the circuit among big caps and bridge in that JOU JYE psus boosts voltage when PC is off. With no fans moving, a significant amount of heat is produced, that leads to the board discoloration in just every same JJ psu I have seen...

I decided to put out the small 2.2uF caps and disable that circuit.
Heat produced when psu is in 5vsb only mode is now negligible, and voltage is normal.

I read you have removed caps to avoid useless power dissipation, I will do the same.

Thanks
Gianni

[TheLaw]

Re: Power supply build quality pictorial. part 2

Hey everyone,

I was so entertained by looking at random power supplies on this thread that I decided to bust open one of my own. This sucker was a pain in the butt. Dell likes to make things complicated.

Anyway, this is a power supply from a Dell Dimension 8100, which was released in 2001. It has as labeled peak wattage of 250W and was manufactured by Newton Power (Delta).

It definitley looks like a solid supply. I think the same speced supply could be made in about half the space nowadays, but hey, this supply is already 10 years old. It has 2 daughter-boards. One is for the transient filter, and one is a controller board of a sort.

Capacitors onboard:

-Nichicon LU @ 85°C (PFC/Input)
-Nichicon PW @ 105°C (Filtering)
-Rubycon YXG @ 105°C (Filtering)
-Nippon Chemi-Con XY@ 105°C (Filtering)
-Taicon (Controller board)

Enjoy!

[TheLaw]

Re: Power supply build quality pictorial. part 2

I meant Nippon Chemi-Con KY.

I can't edit my post anymore...But for those too lazy to open up the attachments.

[japlytic]

Re: Power supply build quality pictorial. part 2

Casecom ATX450W

Canicon 680uF 200V primaries.
Sapcon 1000uF 16V at +12V and +5VSB (before inductor) rails.
Sapcon 1000uF 10V at +5V rail.
Sapcon 470uF 10V at +3.3V, +5VSB (after inductor) and -5V rails.
Sapcon 470uF 16V at -12V rail.
D13007 primary switching transistors.
16A rectifier for +12V rail.
20A rectifier for +5V rail .
40N03 MOSFET for +3.3V linear regulator.
Four 2A diodes for primary bridge rectifier .
Non-approved Y-class capacitors .
Also has mystery "2005B" chip.
Some serious corners have been cut...

[c_hegge]

Re: Power supply build quality pictorial. part 2

13007 Switchers always seem to go kaboom at about 300-320W on my load tester. My guess is that this would do something similar

[370forlife]

Re: Power supply build quality pictorial. part 2

Thats a sunpro safety series. AT2005B supports UVP, OVP, OPP, 3.3v and 5v correction.

[TheLaw]

Re: Power supply build quality pictorial. part 2

Could someone delete the huuuge pictures I put in my post? They're a lot bigger than I thought and I can't edit them.

I don't want to murder anyone anyone on 64K.

Thanks.

[c_hegge]

Re: Power supply build quality pictorial. part 2

Thats a sunpro safety series. AT2005B supports UVP, OVP, OPP, 3.3v and 5v correction.

Really? I don't see any "TB" (TeBao) markings on the transformers

[370forlife]

Re: Power supply build quality pictorial. part 2

Doesn't mean it isn't a sunpro. Could use a older design transformer that doesn't have the TB markings, or the transformer itself was made by somebody other than Sunpro or at a different Sunpro factory.

[c_hegge]

Thermal Master TM-420 PMSR

Here's a Thermal Master TM-420-PMSR

Caps are all Sapcon (not sacon), CS, Fuhjyyu and JEE
2 X caps, 2 coils and 2 Y-caps on the input filter
Transformer says size 40, but it looks more like a 33
470uF input caps, 13009 knock of Switchers
20A schottky for the 3.3v, 30A for the 5v and a pair of 16A fast recoveries for the 12v.

OEM looks to be sun pro. It will do 350W, but it exploded after about 30 seconds at 420W

Last picture is the frame on the video where it blew up

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

AM607B1 250W

I got that psu without its metal cover so I don't know anything about it except that it is 250W and "AM607B1" is written on pcb.

It has an ADDA fan that is very noisy, every cap on it is fuhjyyu and Teapo, none bulged and there are only 2 holes on metal case for the fan screws...

It works.

[cheese007]

Re: Power supply build quality pictorial. part 2

Just picked this one up recently. Real Power ATX 235U

Nothing spectacular to look at, has a weird texturized feel on the casing, might be because it hasn't exactly lived an easy life.

Cable count is typical for a unit this old, 5 molex, one main, 1 berg.

Fan shot. Easy because this unit exhausts into the computer. It's a 92MM U.S. Toyofan unit that puts out 43.8 CFM.

Label shot. Nothing spectacular. It's an old unit, so low on the 12V side of things.

Finally the guts of the unit. As you can tell by the transformer, what we're dealing with here is an old CWT unit.

Panasonic primaries, very dusty ones at that...

And now we get to the interesting part. As you can see, on the secondary is a forest full of Fuhjyuus and CapXon. Normally, in a unit this well used these would all have puked their guts out long ago. This is because the fan, as mentioned earlier, is an exhaust fan and not intake. This allows the unit to intake cool air and blow it down over the processor situated below it and, at the same time, keep the Fuhjyuus from becoming nothing more then little round cylinders.

[ncovert]

Re: Power supply build quality pictorial. part 2

Both PSUs are made by Lite-ON. You can tell by the UL number (E132068) written on the label and the Lite-ON marking on the transformer on one of the PSUs. Also, most Lite-ON PSUs will say "AMBIENT: 50C MAX" on the label.
One of the PSUs (the one on the left?) looks like it has that brown glue that goes conductive - you might want to remove it as much as you can.
I think you should keep the one on the right (the one with the OST caps). It has a slightly more powerful 12v rail. More clean, too. Just recap it.

I thought Dell power supplies wre made by HiPro

[c_hegge]

Re: Power supply build quality pictorial. part 2

Dell use a few OEMs. The ones I've seen have been either Hipro, Lite-on, Newton or Delta.

[ncovert]

Re: Power supply build quality pictorial. part 2

Today a friend gave me a psu, asking me if I can examine it and find out why it stopped powering on his pentium 3 800mhz system.

I uploaded some photos...

If you look at pic #3, theres a blown capacitor

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

If you look at pic #3, theres a blown capacitor

That psu is p.o.s. so the bulging cap is the last I cared about :P