3 power supplies from the past

[Stefan Payne]

Re: 3 power supplies from the past

Looks a lot like this one:
http://www.planet3dnow.de/artikel/ha...lasse/16.shtml

[Pentium4]

Re: 3 power supplies from the past

The first one is another ACE AM608B1-300WS. I don't know the OEM, "wan nien" is written on PCB.

The bridge rectifier is KBP06, rated for 1.5A only!

That's the smallest bridge rectifier I've ever seen!

What are the markings on the two IC's on the secondary?

Linkworld LPK9-4 300W

The only difference with LPK9-3 is that in LPK9-4 the 5V rectifier is SBL2040CT instead of SBL30.


The bridge rectifier is KBL406.


The switching transistors are 2x E13009L which is more than enough for 300W. Too bad that the main transformer is not ERL35. The secondary toroid coils are not undersized and the outputs rails have coils and caps. 2 caps are bulging though.

The fan is directly connected to 12V without the thermistor in series we see in Linkworld psus.

All main voltage rails rectifiers are rated for 20A. I don't think it's bad, but it certainly wouldn't do 300W without blowing.

This one doesn't look too terrible. And I bet you it could do 300W with some bigger primary capacitors, depending on the efficiency.

What's with that huge resistor on the primary?

There are 2 Panasonic caps on this gutless wonder! The caps are not fake and they measure good to the cap tester! The are 105C FJ 6.3V 1500uF & 2200uF.

Wow! How cool is that. Interesting that they used such a low ESR capacitor in such an old design. I wonder how it does ripple wise with these "motherboard grade" capacitors. I guess now I feel safer using ZLH/ZLJ in old PSU's. Looks like the Jamicon held up okay on the 5VSB, could be failing though.

Classic CWT build quality

I saved the best for last:

Moretec Electronics MPA-8809 (250W) made in 2000.

I am not familiar with that brand, all I can say is this is the actual maker of the psu.

It's the only power supply that actually has fan speed controller, it's the pcb mounted on the secondary heatsink.

The input filtering includes 2 MOVs for surge protection, that none of the 3 previous power supplies had.
The bridge rectifier is KBU6 rated for 6A more than enough for a 250W psu.
The primary capacitors are 470uF JPCE and their actual values are 480uF and 484uF. No fake primary caps here!

The main transformer is size 35 and the switching transistors are 2x C5352 from Toshiba good for 10A continuous, 15A pulsed.

The heatsinks are impressive. There is a daughter board for 5vsb, implying that this is a modified AT design.

The toroid coil is large and could do 350W easily.

The 3.3V is generated after 5V rectification with a 76121P 47A mosfet.

The 5V is rectified with 2x SBL2040C giving 40A total current.

Finally, the 12V rectifier is BYQ28X-200, rated for 10A maximum.

It's nice to see that every main output filter cap is 2200uF. Moreover, there is not a single output in this unit without a coil. All the coils are decently sized and have a core.

Not a single cap is bulging or leaking.

The soldering is good too and there is insulator glued to the PCB as you can see in the picture.

What do you think?

This is such a cool PSU! Neat how they made their own transformers. If you decide to keep it, I bet those little Jenpo caps are long dried out.

What brand is the fan?
Good sized PI coils, nice
If it doesn't have room to solder a 12V connector, you can always use one of those lame molex>12V adapters, as a last resort, because that's a good PSU especially for its time.

What's with this?

[goodpsusearch]

Re: 3 power supplies from the past

That's the smallest bridge rectifier I've ever seen!

What are the markings on the two IC's on the secondary?

KA7500B and LM393N

Looks like the Jamicon held up okay on the 5VSB, could be failing though.

Jamicon are not too bad. I think they are mediocre. All the Jamicon I have seen in psu and ups are General purpose capacitors though.

Classic CWT build quality

You missed that:

https://www.badcaps.net/forum/attach...1&d=1407095552

What brand is the fan?


What's with this?

The fan was some unknown to me brand that I can't remember right now.

I noticed that on the label too!!! I can't think of any possible explanation

[momaka]

Re: 3 power supplies from the past

The Moretec however has 0V on its 3.3V. Maybe the mosfet failed open? Don't know, didn't bother to check.

Not impossible, but I doubt it.
Check the Gate pull-up resistor (usually connected between 12V rail and MOSFET's Gate), it may be open. If not, replace the 431 shunt for the 3.3V rail regulation (the cathode on the 431 shunt should connect to Gate as well, or through a low-value resistor). Also check that the MOSFET is getting 5V on Drain.

Classic CWT build quality
https://www.badcaps.net/forum/attach...1&d=1407092519

I've seen Sun Pro do worse, though - not only did they had the thermal pads messed up, but the leads on the heatsinked components were also bent very badly (almost touching each other). This was on the primary side, too!
Posted it a while back here:
https://www.badcaps.net/forum/showpo...&postcount=883

[Pentium4]

Re: 3 power supplies from the past

You missed that:

Wow that's pretty bad too didn't even catch that.

Reminds me of the RAIDMAX RX-380K 380W I have I use for a bench supply. Heavy on the +5v with 29A and only 11A on the +12 but isn't as gutless as would expect from other older supplies. One of these days I'll get around to recapping it as it has partially bulging Teapo's inside. Used to serve pretty well on my overclocked Opteron 170 back in the days though.

Is yours made by Sun Pro? (TB markings on the transformer) I don't think I've ever seen Sun Pro use Teapo caps before.

not only did they had the thermal pads messed up, but the leads on the heatsinked components were also bent very badly (almost touching each other). This was on the primary side, too!

Wow, that's pretty bad...and that secondary is WAY too crammed. Sun Pro makes a decent PSU when they try. Believe it or not, I have a double forward Sun Pro PSU (With no PFC), I will post it in the build quality pictoral eventually, it is quite interesting.

[goodpsusearch]

Re: 3 power supplies from the past

Jou Jye Electronic JJ-250T

2001 psu with stuck sleeve bearing Globe fan

Very similar with Jou Jye Electronic TA-300CE

-Capxon 470uF primary caps

-4A bridge rectifier

-2x E13009F switching transistors TO-220F package.

-ERL 35 transformer, very good to see in a 250W psu.

-DBL494 PWM controller

-Special daughter board probably for UVP and OVP.

-S20C40C for 3.3V, S30D40C for 5V and F12C20 or F16C20 for 12V. There is glue on the rectifier that I wasn't able to scrap completely to read the label.

There are proper pi coils on 5vsb and main voltages and 2 caps for every main voltage except 12V, even though the PCB has empty spot for second cap.

The "fan controller" is disappointingly a thermistor in series with the fan..

[Pentium4]

Re: 3 power supplies from the past

Does it still work?
Jou Jye makes excellent power supplies, too bad they use such low quality caps.
That secondary heatsink is good sized. I bet this thing could do over 300W continuously no problem.
The 12V only has one cap but look at that huge PI filter! Plenty to filter what the label claims (and I bet it's F16C20)

[goodpsusearch]

Re: 3 power supplies from the past

I will test it tomorrow morning, it's night here now and I don't want the lights out

[goodpsusearch]

Re: 3 power supplies from the past

5vsb is ok but it refuses to start. Probably shorted turns on toroid coil, due to black glue.

[Pentium4]

Re: 3 power supplies from the past

Possibly, there's a lot of dark glue in there. Also consider that probably most of the little caps are dried out. How does the solder side look?

[goodpsusearch]

Re: 3 power supplies from the past

I didn't have enough time to check the solder side.

I got an Enhance psu from the same period. I am going to post about that soon. Looks interesting!

[momaka]

Re: 3 power supplies from the past

5vsb is ok but it refuses to start. Probably shorted turns on toroid coil, due to black glue.

Sometimes, bad output caps can make the PSU refuse to start as well.
This is where old caps (even from crappy unreliable brands) come handy. You may laugh, but I do keep my non-bulged Fuhjyyu caps precisely for things like this .

Looks like a decent PSU and the 250W rating is appropriate.

[goodpsusearch]

Re: 3 power supplies from the past

I keep any working cap regardless of the brand! You never know... I also keep the bulging caps as trophies

[momaka]

Re: 3 power supplies from the past

^HAHA, same here. I can take any bulged cap from my "bad" bin and tell you exactly what piece of equipment it came out of. Just got a "rare" Fuhjyyu TNR 1650 uF 16V cap from a CWT PSU .

Also have a small box of "bad parts". This includes MOSFETs, diodes, fuses, ceramic capacitors, and other such failed devices.

[c_hegge]

Re: 3 power supplies from the past

I keep any working cap regardless of the brand! You never know... I also keep the bulging caps as trophies

I keep all of my junk caps too, but probably for very different reasons to you and momaka

[kaboom]

Re: 3 power supplies from the past

^HAHA, same here. I can take any bulged cap from my "bad" bin and tell you exactly what piece of equipment it came out of.

I used to, but it became too much! I "rotate" my junky testing caps out every so often- if there's a "WC" cap in the stash and I pull an Elite of the same value, depending on age of both, I may keep one or both of 'em. Good to have test-only caps for verifying a recap will fix something...

I used to keep containers of bad ones, to see how much I'd "fill it up" over the year, but they got in the way, and knocking the container over was rather... annoying.

Just got a "rare" Fuhjyyu TNR 1650 uF 16V cap from a CWT PSU .

$75 on ebay. $200 if you add the words "vintage" and "collectible."

Also have a small box of "bad parts". This includes MOSFETs, diodes, fuses, ceramic capacitors, and other such failed devices.

A month ago, after hours of fighting with thunderbird(?) and some outlook import plugin to save someone from 8 years of outlook hell, I smashed a bunch of that stuff that was on one of my benches.

"Therapy," baby...

[goodpsusearch]

Re: 3 power supplies from the past

Enhance Electronics ATX-1125BTA (300W) made in 2001

Wow! That's beautiful!! I like the label and the PCB layout.

The PPFC coil is bigger than expected on a 300W psu. In fact that's the size and weight of a PPFC coil for a 400-450W power supply!

The fan is not the usual Globe Fan that always seizes after some years of use. It's an ADDA sleeve bearing fan that never stopped working and it's the reason that only 1 capacitor is bulging even though this psu was working for more than 10 years... Everything inside was covered in dust...

The input filtering includes MOV protection. The fuse is covered with heat shrink.

The bridge rectifier is KBU605, rated for 6A and the primary caps are Teapo 200V 680uF and their real capacity is 680uF and 689uF. Those, along with 2X 2SC2625 (10A continuous) switching transistors and the ERL35 main trafo make sure that this power supply is capable of doing 300W continuous.

The smaller transformers are of proper size too!

Look at that! The primary heatsink is cut to make space for the ceramic capacitor! Cute!

The PWM ic is TL494CN and the supervisor IC is Enhance proprietary, LS-16801B, I couldn't find any datasheet.

There is MC7905CT negative voltage reg for -5V, 2x S40SC4 40A 40V, one for 3.3V and the other for 5V rectification, while 12V is rectified with one BYQ30E-200 ultra fast rectifier, rated for 16A.

Output caps and coils:

5vsb: 2x470uF 16V Jamicon WG and a coil

-12V: 1x470uF 16V Jamicon WG and a coil

-5V: 22uF 16v Teapo SEK, no coil

3.3V: 1x 2200uF 6.3V Teapo SC bulging & 1x 1000uF 6.3V Jamicon WG and a coil

5V: 2x 2200uF 6.3V Teapo SC & a coil

12V: 1x 3300uF 16V Jamicon WG & a coil


The fan controller circuit is not just a thermistor in series with the fan.


Tomorrow I will see if the psu works. All I know atm is that the fuse is not open.

The only thing that disappointed me is that the power supply had no plastic material under the PCB. Btw the soldering is excellent!

edit: product datasheet: https://cdn.badcaps-static.com/pdfs/...bd40397184.pdf

[Wester547]

Re: 3 power supplies from the past

I recommend pulling back the sticker and plug on that ADDA fan to see how much oil it has left. The shaft may be very dry by now so I'd oil it unless it has good lubrication already. The output filtering seems a little light to me and those toroids look a tad small. Not surprised the Teapo failed on the +3.3V rail as it looks to be touching the main toroid. Looks good otherwise, except that it might use a two transistor +5VSB circuit and possibly conductive glue.

[goodpsusearch]

Re: 3 power supplies from the past

I decided to recap the Linkworld LPH6-300W power supply, using a mix of Japanese and non Japanese capacitors.

That's the best Linkworld I've seen too. Very impressive. I can't find much on that model number at all. If you don't mind me asking, what markings are on the main transformer under that "QI OK" sticker?

Sorry for the delay. Here is the transformer's markings:

[Pentium4]

Re: 3 power supplies from the past

I was just curious about the date code. Wow that thing is old! Nice job on fixing it up, I like seeing old PSU's still getting rebuilds and use. I know it would be annoying to pull it out again to replace, but I've seen tons of low value Fuhjyyu TNR fail very high ESR or low capacitance.