HIPRO with lots of teapo goodness ;)

[cyclones]

I have a HIPRO 305W PSU P3087F3 that I think is bad. It is out of a Gateway P4 tower. The computer has been acting flaky for a while now. Sometimes it hangs at the firmware screen. Sometimes it starts to power on, but nothing comes up on the screen at all. It won't reliably come out of sleep mode.

Last night I tried to start up the computer and nothing. Unplugged power... waited a minute, plugged back in... blue light on power button up front. Green light on mobo.... other than that, nothing. Later I opened up the PSU and blew dust out of it. Checked on caps... none bulging, but of course that doesn't mean much. There are quite a few teapos in there. So I'm assuming the teapos are bad and that's why there's no start.

I'm going to check the motherboard caps... it's an Intel Augsburg board so I think the caps are probably decent.

[cyclones]

Mobo caps are part KZE, part something else. Haven't heard of this brand/series before.. I realized I had an older ATX PS that I had previously recapped. It only had a 20 pin connector on it vs 24 but it did have the extra 4-pin CPU power plug. I wasn't sure if I could use this or not, but I checked the Intel docs and it said such a PSU could be used. So I connected it up and the computer came up on the first try... booted Linux no problem and I'm typing on it right now. This is great!

I am wondering about the output of the PS though. It is a 300W but lower 12V output than the previous one. This one has 10A on the +12V. In order to lower the load, I disconnected the optical drive and removed the PCIe video card (using lower power integrated graphics instead) before starting up the computer. The video card is not a monster; in fact it is rather small, but is powerful enough to need a small fan. The CPU is an Intel P4 3.6Ghz Prescott 2M.

At this point I am planning to completely recap the original PSU... any comments on this are appreciated. Just want to make sure that's the problem.

[c_hegge]

Recapping the PSU shouldn't be a problem. I have ressurrected hundreds by recapping them.

Btw, the KZE caps on the motheboars are chemi-con KZE series. They are reliable and can stay. KZG on the other hand are horrible and often fail without bulging.

[PCBONEZ]

Originally Posted by cyclones

I'm going to check the motherboard caps... it's an Intel Augsburg board so I think the caps are probably decent.

Like c_hegge said, not if you got the KZGs.
KZG (and KZJ) will fail with no bloating.
The other Chemicon series are fine.
.

[mockingbird]

Had one of these sitting around for a while, pulled out of a Gateway I acquired. "Adda" fan (AD0812HS-A70GL) has seized and caused most of the caps to bloat. There is also dark discoloration all around the secondary FETs on the PCB, but nothing appears to be damaged. I think this is the first time I've seen the 16V 2200uF Teapo SC bloated, they're usually visually ok on the FSP/Sparkle units.

PSU oddly has a PCIe connector. Last week I took apart a 24-pin InWin that had the -5V circuit, so I guess anything is possible.

Chips on the two modular boards I had to unsolder to remove the caps on are:

Board on primary side:
1) ST LM393N
2) OnSemi UC3843AN
3) TNY266P - Bingo. 5VSB chip. If it didn't have this, it would have been relegated to the pile that needs the mod done as soon as I develop enough skill to do Everell's mod, G-D willing.

Secondary board has the Welltrend WT7517.

All the MOSFETs appear to be either ST, OnSemi, or Farchild, so HiPro didn't skimp here. The heatsinks are also pleasantly oversized, and the half bridge is also screwed to an albeit miniscule heatsink which is a nice touch.

The tack that HiPro used here is a high quality tack which will not oxidize. I'm not worried about it like I am with the tack used on Bestec units. Has a more enamel-like texture than the foamy tack used on Delta units.

Only two ferrite coils for the secondary pi filters, and two TO-220 standing on their own in the secondary, one Fairchild KA7912 near the top of the PCB, and one ST TYN-408. Datasheet says the 408 is a rectifier, maybe someone has some insight on what these two are doing here.

Many of the 10mm caps can be replaced with 12.5mm caps (Good old Hipro - always silkscreening to allow for 12.5mm caps), and I will probably use them where I can.

Neutral and load cables were crimped into a connector, so I had to unsolder nothing to remove the PCB from the chassis. The 115v/230v switcher also unscrewed completely which is nice.

All in all, a nice PSU, not as easy to work with as the D3057F3H, but definitely a quality PSU worth re-capping.

[Wester547]

A -5V rail seems peculiar on anything past ATXV12 1.2 and ATXV12 2.0, but I noticed that the ATX guide says that only "guidance" was "removed" for the -5V rail, not completely saying that it's prohibited from use, just no longer an integral part of the spec.

The AD0812HS-A70GL seems to be a popular choice of fans in PSUs. I had a HP-2507F3P (or a DLP2507F3P, a unit built for Dell) which had the same fan, though it didn't quite seize yet as if I rotated it with a Q-tip before turning it on it would still spin fast enough to work, so the lubricant was definitely on its way out. Since it had a vent at the side, though, when the clamshell case (a Dell Dimension 8200) that PSU was in completely closed at the side, the airflow was somewhat more limited than it was with the case open. Perhaps for better - the more air pushed, the more dust the fan accumulates, so the oil in the sleeve might have evaporated sooner. Generally though, I don't care for that deisgn. That particular PSU like yours was very well built and very, at that, overbuilt (it's quite heavy and has a Passive PFC next to the primary heatsink). Its capacitors, however, had not bloated yet. It had a mingling of Teapos, Asiacons, and G-Luxons (Teapo and G-Luxon on the 5VSB rail). Its secondary heatsink was much thicker and, being a single-transistor forward design, it has 9.7A part by ST as its switching transistor (!!!), and essentially a (PBL) 7A rectifying bridge without a heatsink. The secondary side has a 60A/45V part by OnSemi on the 5V rail, a 40A/45V part by ST on the 3.3V rail, and a 20A/100V part by ST on the 12V rail, along with a 35 sized transformer and a Shenzhen MC7912CT part at the back. Primaries were 680uF/200V Teapo LXKs rated at 85C. There was only one or two coils on the secondary as well, though, but that's what I usually see in Hipros. The 5VSB chip (a TOP200YA) was soldered onto a smaller heatsink. All the secondary capacitors were naturally rated at 105C. 250W is brutally underrating a PSU like that. More like 300W continuous.

Your PSU is nice too. I generally speaking don't see units designed better than Hipros if you put aside their choice of capacitors and fans, and sometimes, maybe a few other select things.

[Th3_uN1Qu3]

Originally Posted by mockingbird

two TO-220 standing on their own in the secondary, one Fairchild KA7912 near the top of the PCB, and one ST TYN-408. Datasheet says the 408 is a rectifier, maybe someone has some insight on what these two are doing here.

The 7912 is definitely for regulating the -12v rail. I've seen a number of units with the same setup. The TYN-408 is a SCR aka thyristor - it's likely part of a crowbar protection circuit.

[aanev]

Anyone schematic about this PSU?My psu is starting randomly, not always.