Another Jou Jye Electronic JJ-400PPGA for recap

[goodpsusearch]

More info about this power supply here:
https://www.badcaps.net/forum/showth...Jye#post103490

It is half bridge but very well built.

The 2 main caps are Capxon 1000uF 200V and their real capacity was measured 1011uF and 1036uF

The biggest problem with these power supplies is that they use Capxon KM general purpose caps on secondary outputs and those always fail. Some later revisions use JunFu WG and I haven't seen any failed yet.

I took some photos with the bulging caps removed. I also attach the datasheets of the transistors and rectifiers of the psu.

[Pentium4]

Re: Another Jou Jye Electronic JJ-400PPGA for recap

Nice! I like that PSU, especially the beefy switchers! It could probably do 400W, although the main toroid might get a little toasty. The only thing I don't like about it though, is the fact that it uses a separate heatsink for the 5VSB transistor, it's better than nothing but it probably gets insanely hot. Even the big heatsinks get warm from those two transistor designs.

Which rectifier is on the 12V? What fan does it use?

[goodpsusearch]

Re: Another Jou Jye Electronic JJ-400PPGA for recap

Nice! I like that PSU, especially the beefy switchers! It could probably do 400W, although the main toroid might get a little toasty. The only thing I don't like about it though, is the fact that it uses a separate heatsink for the 5VSB transistor, it's better than nothing but it probably gets insanely hot. Even the big heatsinks get warm from those two transistor designs.

Which rectifier is on the 12V? What fan does it use?

The primary switchers are 2x 2SC3320.

The main toroid is big enough for 500W, it's just that the 3.3V toroid is ridiculously big that it makes the other toroid seem small in those pics. Look at this:
https://www.badcaps.net/forum/attach...5&d=1268336235
This is the 460w model but they are similar in most aspects.

Yes, it's a fault they corrected some versions later:
https://www.badcaps.net/forum/attach...3&d=1268336235 2007 version

The model of this thread is 2006. You should see the 2004 version. The 5vsb transistor heatsink was much thinner than this and there was brown glue transferring heat to a small cap that always failed. The power supplies failed due to 5vsb failure. One day I am going to examine those failed psus that I keep and try to repair them.

12V: 2x F16C20

The fan is Xinruilian sleeve bearing probably.

[Wester547]

Re: Another Jou Jye Electronic JJ-400PPGA for recap

Nice! I like that PSU, especially the beefy switchers! It could probably do 400W, although the main toroid might get a little toasty. The only thing I don't like about it though, is the fact that it uses a separate heatsink for the 5VSB transistor, it's better than nothing but it probably gets insanely hot. Even the big heatsinks get warm from those two transistor designs.

That heatsink appears finless, which definitely isn't good, especially considering the +5VSB transistor is a TO-220 BJT without the metal tab. But that isn't the worst of it. Seasonic and even Delta/Newton in some older, two-transistor +5VSB designs would have the +5VSB transistor without a heatsink on more than a few occasions (the Delta and Foxlink power supplies in the original Xbox also used a two-transistor +3.3VSB circuit with the FET being without a heatsink), yet what would cause discoloration to the PCB (what generated the most heat around that area) was always the +5VSB diode rectifying the +5VSB auxiliary traffo (not talking about the output diode but the diode on the primary side, the very diode the critical capacitor is there to filter). Those diodes ran so hot that they would in fact cook even Japanese "critical" capacitors if within close enough proximity and with enough time. The MOSFETs they used weren't any more efficient than the ones seen in other two-transitor +5VSB circuits, either, but at least they used MOSFETs and not BJTs (those would get significantly hotter), maybe that's how they got away with it (besides 24/7 use, that is, when the fan is always on).

[goodpsusearch]

Re: Another Jou Jye Electronic JJ-400PPGA for recap

Recapped

[Pentium4]

Re: Another Jou Jye Electronic JJ-400PPGA for recap

It looks awesome! Nice job and 12.5mm caps fit on the filtering, even better! The only thing I would have done additionally is wedge a piece of plastic between the main toroid and those two caps. Did you replace or oil the fan? Xinrulian fans aren't reliable.

[goodpsusearch]

Re: Another Jou Jye Electronic JJ-400PPGA for recap

I have many Jou Jye psus, some of them running in computers many hours per day for 3 years or more and none of the fans has failed yet. I am considering to oil them some time though. Yeap, I've seen at least 2 failed Xinruilian fans. They came from Codegen psus if I remember correctly.