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Old 08-25-2019, 02:18 AM   #3041
rigmo
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Default Re: Power supply build quality pictorial. part 2

Hi Guys Im from Croatia hobby player And Im burned my power supply.. im looking for schematic ... because my restors is burned in less then one second..
board is KY-2102A REV:1.3
If you can help me with schematic.. pleas.. i need to know values.
Im apologies for my bad english ..
thank you in advance
best regards
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Old 08-25-2019, 02:26 AM   #3042
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Default Re: Power supply build quality pictorial. part 2

This is my problem
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Old 08-25-2019, 09:28 PM   #3043
kevin!
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Default Re: Power supply build quality pictorial. part 2

I bring new photos of another PSU, this time it's from an AT, this is one of the best AT psu I have, it came from an ADLink industrial computer. according to UL, manufactured by ZIPPY TECHNOLOGY CORP.
Even the fan is of quality, this unit never ceases to amaze me.
The PSU has more than 50,000h, and still works (according to the smart parameters of the HDD that came from the same computer where the PSU comes from)
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Old 08-25-2019, 09:51 PM   #3044
Dan81
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Default Re: Power supply build quality pictorial. part 2

Okay, might as well post my FSP.


Here it is, a FSP Bluestorm II 500W I got for $3. Had bulging Capxons in the secondary and 5vsb, althpugh the main cap (420uF 400V) is fine.

Replaced most caps with what I had on my hand, as well as a few caps from a dead Delta.
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Old 08-26-2019, 04:07 AM   #3045
Stefan Payne
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Default Re: Power supply build quality pictorial. part 2

And its a rather late part, end of 2007, so it should be fine and not have the "Material Issue". That's something that happened with this plattform in the 2005/2006 time frame.
And I doubt there are any left. At least lower wattage ones.
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Old 08-26-2019, 06:15 AM   #3046
Dan81
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Default Re: Power supply build quality pictorial. part 2

I haven't seen any GLN/GLY low wattage here. Maybe a 350W PNF about 4-5 years ago but the store that had it has long since closed down.

Anyways, don't mind the primary cap looking like that. I was suspecting it was bulging when in fact it was the black plastic sheet over it that made it look that way, and I couldn't get it back there.

Great to hear that the later units (late 2007 onwards) are more reliable. Guess that doing the recap got me safe for another 10-20 years from now on? It's gonna power a Q9400 w/ 4GB DDR3 (planning for either 8 or 16GBs tho) and possibly a R9 270x in the future.
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Old 08-26-2019, 11:17 PM   #3047
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Default Re: Power supply build quality pictorial. part 2

Quote:
Originally Posted by rigmo View Post
Hi Guys Im from Croatia hobby player And Im burned my power supply.. im looking for schematic ... because my restors is burned in less then one second..
board is KY-2102A REV:1.3
If you can help me with schematic.. pleas.. i need to know values.
I doubt you will find a schematic for this particular power supply anywhere on the internet. However, there are several popular "generic" schematics floating around for the old crappy half-bridge PSUs.

Looking at your pictures, I want to say that power supply really is NOT worth repairing (or only for fun/learning.)

But if you really are deadset on repairing this, I'd suggest starting a new thread and posting all relevant pictures and information there. From what I can see here based on these pictures, that burned resistors appears to be part of your 5VSB circuit. So do this: plug in the power supply and see what voltage you get between the purple (5VSB wire) and ground (any black wire.) Should get 5V. If not, you have to troubleshoot that 5VSB circuit before anything else in the PSU will work. Speaking of which, that 5VSB circuit appears to be a 2-transistor design, and those are known to go in a puff of smoke when something goes bad, like the electrolytic caps on the output or the "critical" small startup cap (if this PSU has one.)

Quote:
Originally Posted by kevin! View Post
I bring new photos of another PSU, this time it's from an AT, this is one of the best AT psu I have, it came from an ADLink industrial computer. according to UL, manufactured by ZIPPY TECHNOLOGY CORP.
An eMacs PSU... Yup, those are as solid as a PSU can get: Japanese caps, nice fan, good quality parts throughout, and excellent soldering. But what I like the best: that blue "Pb" sticker, indicating leaded solder and components.
This was definitely made before the era of RoHS crap and of course would last a very long time.

I also like the automatic line voltage switch. This is a feature I've only seen before on certain Astec PSUs. On that note, Astec PSUs are of similar quality.

Quote:
Originally Posted by Dan81 View Post
Here it is, a FSP Bluestorm II 500W I got for $3. Had bulging Capxons in the secondary and 5vsb, althpugh the main cap (420uF 400V) is fine.
Very nice deal for $3!!
Should be a solid PSU with the new caps now.
Only thing I suggest doing is adding a 2 to 4 uF polypropylene 450V or 630V in parallel with that main CapXon cap. This PP cap will soak up all of the high-frequency crap so that the CrapXon won't have to. Also, in the event that the CapXon primary cap does go bad (it more than likely will eventually, due to APFC), the PP cap should still present enough capacitance to prevent the primary side from blowing up. Otherwise, a blown open primary cap often leads to blown APFC components and sometimes even other ICs behind the APFC.

Last edited by momaka; 08-26-2019 at 11:19 PM..
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Old 08-27-2019, 12:09 AM   #3048
kevin!
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Default Re: Power supply build quality pictorial. part 2

Quote:
Originally Posted by momaka View Post

An eMacs PSU... Yup, those are as solid as a PSU can get: Japanese caps, nice fan, good quality parts throughout, and excellent soldering. But what I like the best: that blue "Pb" sticker, indicating leaded solder and components.
This was definitely made before the era of RoHS crap and of course would last a very long time.

I also like the automatic line voltage switch. This is a feature I've only seen before on certain Astec PSUs. On that note, Astec PSUs are of similar quality.
In that detail of the lead solders I had not noticed, you're right, those welds will never break. This PSU is for life .
I have an AT case to mount a computer for classic games based on a Pentium MMX, and I will use this great PSU.
If I am honest, I did not know the emacs (Zippy) brand, I was very surprised with its construction quality, and I am right, it is at Astec level.
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Old 08-28-2019, 08:40 AM   #3049
Stefan Payne
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Default Re: Power supply build quality pictorial. part 2

Quote:
Originally Posted by Dan81 View Post
I haven't seen any GLN/GLY low wattage here. Maybe a 350W PNF about 4-5 years ago but the store that had it has long since closed down.
I meant ~400-550W for the most part.
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