I got two of these for free from my friend that runs these lan parties around here. One blew a primary switcher (the one running the 260's,) and the other was just fine. So I used the blown one as a reference and in case I blew out or damaged some part while replacing the more complex parts. He used to have them both running his dual gtx260 rig before he got his third, one running mobo, cpu (q9550 oc'd to 3.4ghz,) and hard drive, the other running both gtx260's. It somehow ran just fine (well, until the blow out). This is based on the same pcb as the Powork 650 on the JG bargain basement roundup that made it to about 350W, with smaller parts, so I figured it has some potential.
What I did:
First off, I needed a case to put it in. Bestec to the rescue! I used a bestec atx-250-12Z case that I had laying around, already had a X cap on the AC receptacle, cut out the punched out fan grill and used one of those wire fan grills with a nidec 35cfm fan.
Replaced canicon 200v 470uf primaries with UCC SMG 200v 680uf primaries, replaced 4A 400v bridge rectifier with 8A 800V bridge rectifier, put in two .22uf X caps, and a coil.
The secondary caps were a joke. They were tiny, but not overrated for their size. All of them were Micon brand. They were just ridiculously low value. The 12v was filtered by 1 16v, 1000uf, and a 16v 470uf (no, it was not the -12v cap,) same for the 5v, but with 10v caps, and the 3.3v had just a 10v, 470uf. Pitiful, eh? Anyways, replaced the two 16v caps with 16v, 1500uf UCC's, replaced the two 10v caps with Rubycon 10v, 1500uf and 10v, 1000uf. There is a second 12v rail marked out on the pcb and it has caps for it, which were the same story as the other 12v, and replaced those with two Panasonic 16v, 1500uf's. Finally, the 3.3v got a rubycon 10v, 1500uf.
Now, the more advanced stuff. I took out the primary heatsink, it was quite easy and it didn't take more than a $15 radio shack (I'm sorry, the shack,) 40W soldering iron with solder sucker attachment to get it out. I replaced the two small imitation fairchild (the logo looked like the fairchild F, but had the dash taken out of it so it was a J) tiny primary switchers to the primary switchers from a wrecked 400W CWT. I then put the heatsink back in and tested it, worked great.
Next, I replaced the secondary side components. It had a somewhat beefy 5v silicon, but the 12v and 3.3v were a joke. So I replaced the 12v diode with the 12v one from the CWT, the 5v one was replaced by the 5v one from a proprietary dell newton 200W, it had a 5v rated at 22A. and the 3.3v got the 5v's old one. Powered it up again, and it started right up. Read the voltages, 5v, 5.16. 3.3v, 3.41. 12v, 12.54...wait, thats a little high, I'm just going to assume thats due to the low 12v load with just one hard drive. It was 12.39 before I changed the secondary silicon. Maybe just because of the larger capacity?
Finally, I replaced the "33" labeled transformer (the hairong 480W from the JG bargain roundup had a 33 transformer that did 284 watts,) with one from a old AT 300W AGI Hipro built (blown caps, not much use for a AT psu with extra short leads). This thing is much larger than the "33" labeled transformer. I am sure that it can do my new labeled specs.
(yes, LN are my initials)
Also, a word about these "33" and "35" labeled transformers. I don't think it means squat. As you can see from one of my pictures, I put the old "33" transformer from my YueLin on top of the "35" labeled transformer from my 350W rosewill. Same size.
What I did:
First off, I needed a case to put it in. Bestec to the rescue! I used a bestec atx-250-12Z case that I had laying around, already had a X cap on the AC receptacle, cut out the punched out fan grill and used one of those wire fan grills with a nidec 35cfm fan.
Replaced canicon 200v 470uf primaries with UCC SMG 200v 680uf primaries, replaced 4A 400v bridge rectifier with 8A 800V bridge rectifier, put in two .22uf X caps, and a coil.
The secondary caps were a joke. They were tiny, but not overrated for their size. All of them were Micon brand. They were just ridiculously low value. The 12v was filtered by 1 16v, 1000uf, and a 16v 470uf (no, it was not the -12v cap,) same for the 5v, but with 10v caps, and the 3.3v had just a 10v, 470uf. Pitiful, eh? Anyways, replaced the two 16v caps with 16v, 1500uf UCC's, replaced the two 10v caps with Rubycon 10v, 1500uf and 10v, 1000uf. There is a second 12v rail marked out on the pcb and it has caps for it, which were the same story as the other 12v, and replaced those with two Panasonic 16v, 1500uf's. Finally, the 3.3v got a rubycon 10v, 1500uf.
Now, the more advanced stuff. I took out the primary heatsink, it was quite easy and it didn't take more than a $15 radio shack (I'm sorry, the shack,) 40W soldering iron with solder sucker attachment to get it out. I replaced the two small imitation fairchild (the logo looked like the fairchild F, but had the dash taken out of it so it was a J) tiny primary switchers to the primary switchers from a wrecked 400W CWT. I then put the heatsink back in and tested it, worked great.
Next, I replaced the secondary side components. It had a somewhat beefy 5v silicon, but the 12v and 3.3v were a joke. So I replaced the 12v diode with the 12v one from the CWT, the 5v one was replaced by the 5v one from a proprietary dell newton 200W, it had a 5v rated at 22A. and the 3.3v got the 5v's old one. Powered it up again, and it started right up. Read the voltages, 5v, 5.16. 3.3v, 3.41. 12v, 12.54...wait, thats a little high, I'm just going to assume thats due to the low 12v load with just one hard drive. It was 12.39 before I changed the secondary silicon. Maybe just because of the larger capacity?
Finally, I replaced the "33" labeled transformer (the hairong 480W from the JG bargain roundup had a 33 transformer that did 284 watts,) with one from a old AT 300W AGI Hipro built (blown caps, not much use for a AT psu with extra short leads). This thing is much larger than the "33" labeled transformer. I am sure that it can do my new labeled specs.
(yes, LN are my initials)
Also, a word about these "33" and "35" labeled transformers. I don't think it means squat. As you can see from one of my pictures, I put the old "33" transformer from my YueLin on top of the "35" labeled transformer from my 350W rosewill. Same size.
Attached Files
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you will have to do some more!
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