Re: PSU acting like bad caps after replacing
Hey Ben.
Good info. I tried to get right around the same and from what I remember they were either just around the same ESR or -/+1% or so.
envoid
Member
Last Activity: 09-26-2022, 01:45 AM
Joined: 12-28-2009
Location: Atlanta, GA
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Re: PSU acting like bad caps after replacing
Hi guys.
I got some time again and am looking at the 700w PSU again (left them in a corner in the basement since). I found a bad/weak solder joint on the APFC board but also two resistors with 0 ohms.
I'm thinking the pink one is 13.8 ohm and the blue as 3.8 ohm but I don't see those as common values. Can anyone help ID these?
thank you!...Leave a comment:
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Re: PSU acting like bad caps after replacing
Sorry to bring this thread back from the dead, I just wanted to make sure everyone knew my appreciation for the help from everyone, especially Toasty. Thank you!
And for closure, I've decided to just steal parts from these PSUs and get a new one. If I had more time I might try more things...Leave a comment:
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Re: PSU acting like bad caps after replacing
Thank you, Bonez, for clarifying that. Makes sense now. I just wish this damn PSU made sense.
This situation reminds me of an old LCD TV I was messing with. It blew its MOSFET and then the fuse but then someone (not me) jumpered the fuse and blew the board. I repaired/replaced the burnt up parts but it still wouldn't give voltage. It had the primary side and the standby voltage all fine, just not the secondary side like here, well sorta. I gave up on it as I was more into it than I wanted to be and I could never get it...Leave a comment:
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Re: PSU acting like bad caps after replacing
Btw, Happy Thanksgiving!Leave a comment:
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Re: PSU acting like bad caps after replacing
Bonez, they seemed to have used just two different caps for everything, the OST 2200uf/16v and the CapXon 1000uf/16v (minus those tiny ones and the mains). The OST that I replaced with the Panny FM is on the 3.3v line. I traced them I think four times now just to make sure I wasn't seeing things or missing something.
I triple-checked the polarities as I wondered that as well. Also combed over the areas for bridges and made sure the caps matched where they should be.
I checked the diode before and was getting...Leave a comment:
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Re: PSU acting like bad caps after replacing
These three were pulled from the FX600-GLN that was the "other" PSU. Same issue after the caps were installed... Before the caps they were fine on both PSUs. Well, fine as in all was fine before the caps crapped out.
I'm thinking of scrapping these things and just stripping what seems good or what I just put in. Kinda the last straw but unless I try swapping the main cap (which means buying one and with my current budget it would only happen if it definitely fixed it) there's not much more to do. Also kinda don't...Leave a comment:
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Re: PSU acting like bad caps after replacing
I tested the five resistors, all are 10ohm. I also pulled off the MOSfets and the middle one is blown again. That is the one linked closest to the coil (you are talking about the coil closest to the mains cap, right?).
Ah, that GFCI. Yeah, don't have them on this circuit. Though it probably would be a good idea. This circuit has its own breaker in the panel. It is only that one tripping, so thankfully the electrician did it right.
And yeah, no isolation transformer. And I need to make that "light"...Leave a comment:
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Re: PSU acting like bad caps after replacing
Thank you guys! Those OST's that are left are for the 12v line but I was thinking they were ok because with my PSU tester the 12v LED doesn't blink out as bad as the 5v or 3.3v LEDs do. But it is worth a shot. I will need to make an order anyway for the MOSfets probably though I do have two more of the same ones.
I'll check the resistors and the coil. That R18 I think is just flux. I have had to remove all three plus the diode to remove the entire heatsink so I can just replace one component and it's been done a few times...Leave a comment:
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Re: PSU acting like bad caps after replacing
That is weird... I found some datasheets for these that called them IGBT. Makes sense they blow so fast then.
Thanks for posting the images. I didn't notice that.
The mains cap is an LP....Leave a comment:
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Re: PSU acting like bad caps after replacing
Btw, these are the links for the cap datasheets in case someone wants to look over them and find something i missed.
CapXon KF:
[URL="http://www.capxongroup.com/files/2011-KF%20Series.pdf"]http://www.capxongroup.com/files/2011-KF Series.pdf[/URL]
OST RLP:
[URL="http://www.ost.com.tw/PDF/EC/RLP.pdf"]http://www.ost.com.tw/PDF/EC/RLP.pdf[/URL]
Panasonic FR:
[URL="http://industrial.panasonic.com/www-cgi/jvcr13pz.cgi?E+PZ+3+ABA0125+EEUFR1C102B+7+AM"]http://industrial.panasonic.com/www-cgi/jvcr13pz.cgi?E+PZ+3+ABA0125+EEUFR1C102B+7+AM[/URL]...Leave a comment:
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Re: PSU acting like bad caps after replacing
I'm going to rephrase the summary of this thing as I'm not sure I'm answering all your questions...
I had blown caps and a blown IGBT from the caps. Replaced the caps and the IGBT and it didn't trip the breaker when mains was applied. However, it would still act like it had bad caps as it couldn't supply a load to anything. Tried a heavy load (my system) again and I think it blew a IGBT again. I haven't confirmed this yet but I'm figuring it is one of them again. And this is where it is at.Leave a comment:
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Re: PSU acting like bad caps after replacing
I haven't rechecked them since this last time it blew but last time it was the IGBT. They are 20N60C3 IGBT's (three of them) and the diode is a BYC8-600. The power supply model is FSP FX700-GLN. The switching transistors are PFV218N50 and the rectifier bridges are GBU606. The bridges were never taken out but looked ok (no shorts or bad polarity checks). The switching transistors were not taken out either but no shorts as well. It didn't short out after I replaced the one bad IGBT but it also wouldn't supply a proper load either. It only...Last edited by envoid; 11-23-2011, 11:56 AM. Reason: images, details, other things i moronically left outLeave a comment:
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Re: PSU acting like bad caps after replacing
Thanks for the link, Toasty. I will try building that today while getting the pictures (having to watch the son this morning).
My tester has two large ceramic resistors that produce a load but have to look again to see which lines. I am thinking these FSP supplies had a problem with it but last night on a real load (my system) it blew that IGBT in under a second (which I still need to take out).
I really appreciate the help with this!Leave a comment:
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Re: PSU acting like bad caps after replacing
The only caps I didn't replace in the 700 were two 2200uf/16v on the 12v side (they are OST RLP). All the others were replaced (1000uf/16v). There was one that was one of the 2200uf/16v on the 3.3v line that I replaced with a 2200uf/6.3v Nichi HM. The 1000uf caps were for the 5v and 12v lines (there might've been one for the 3.3v line as well, little burnt out with it being so late here).
I was messing around with it some more since posting and thought maybe a diode was screwed up as it had 273Kohm in reverse but I just...Leave a comment:
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PSU acting like bad caps after replacing
This is a continuation of [URL="https://www.badcaps.net/forum/showthread.php?t=15165"]my thread[/URL] on my two FSP PSU's.
Replaced the caps on my 700w (along with the bad IGBT) with Panny FR's on the 5v and 12v, a Nichi HM on the 3.3v, and some other FR's in the secondary circuit. Did the the same for my other 600w. Now they both act like they have bad caps still (actually, even worse than before). I looked up the FR's before buying and they (from what the Panasonic data showed) were basically FM's but most of the time with smaller cans. I needed the smaller cans as it... -
Re: FSP PSU and Capxon caps
Hate to revive an older thread but finally got the caps in and since this is about this damn PSU again I felt starting a new thread wasn't right.
I found some new Panasonic FR caps which are like the FM's but smaller but still had to use those Nichi's for that tight spot and replaced all the Teapo's and Capxon's. Now, wife's PSU is fixed, another PSU is fixed, but mine just keeps tripping the breaker as soon as AC is applied.
I suck at switching power supplies so would like help if possible again. I'm thinking it is these...Leave a comment:
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Re: FSP PSU and Capxon caps
I might do it anyway then. Better now than do this again later anyway. =)Leave a comment:
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Re: FSP PSU and Capxon caps
Tried fitting the 10mm Panny FM last night and it won't go in at all. It got half way and then it was too tight. And this is without any insulating materials around it. So the HM it is. That should get ordered in a few months lol.
This thing also has some teapo caps, should I just replace them while I'm in this thing? I read some conflicting threads on here about them. They are 5yrs old? One shows "12/06" on the wrapping.
Thanks again everyone!!Leave a comment:
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Re: FSP PSU and Capxon caps
Thats funny, I was contemplating it also, just hadn't had the time to see if anything would work. I was pondering maybe electrical tape placed strategically, though I'm also not sure it is insulating from the heatsink but the coils. Or its for nothing at all and just to make it die faster.
...
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