Found some polys on dead ASUS P5L 1394 mobo. They are labeled 680uF 4V FL with black stripe left from this text, no color marking or manufacturer logo. Who makes these? If you cannot recognize it, I will provide image later
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Unknown polymers
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Re: Unknown polymers
They aren't poly.
They are Panasonic FL.
Should see the [M] for Matsushita somewhere on them.
That's the logo.
The brackets around the M are different than the (M) that means +/-20%.Mann-Made Global Warming.
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Re: Unknown polymers
No no, there is no Matshishita logo, I would recognize it :-) They even use the can typical for polymers, with no vent or so.Last edited by Behemot; 05-13-2011, 05:57 PM.Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
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Re: Unknown polymers
Yes, there are polymer FL, I have seen them."We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."
-Leonid Brezhnev (On the Yom Kippur War)
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Re: Unknown polymers
Were they normally manufacturedd, or is it custom production? You probably don't have datasheet…Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
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Re: Unknown polymers
Panasonic FL are electrolytic.
Not all lytics have vents.
It's not uncommon for those odd ass 680uF 4v lytics to not have vents.
OST has been doing that for ages.
I've seen Panny FL's like that.
I've seen Rubycon ZL like that. [By RAM slots on some Dell boards.]
And as recently discovered in another thread with TMV, Chemicon does it too.
Not all that unusual...
.Mann-Made Global Warming.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
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You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: Unknown polymers
Originally posted by PCBONEZ View PostPanasonic FL are electrolytic.
Not all lytics have vents.
It's not uncommon for those odd ass 680uF 4v lytics to not have vents.
OST has been doing that for ages.
I've seen Panny FL's like that.
I've seen Rubycon ZL like that. [By RAM slots on some Dell boards.]
And as recently discovered in another thread with TMV, Chemicon does it too.
Not all that unusual...
.
link to reference V-FK, V-FP presentation.
http://www.ttieurope.com/docs/IO/175...esentation.pdf
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Re: Unknown polymers
Interestingly I was just thinking about this then someone posted a nice pic of it.
Here:
https://www.badcaps.net/forum/showth...374#post165374
See those round holes?
Those are basically weakly glued in rubber plugs in through-holes.
That's another way they accomplish pressure relief but it's usually done on much larger caps.
.Mann-Made Global Warming.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
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You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: Unknown polymers
OK, I think I will canibalize them, but sacrifice one piece and have a look inside to discover what they really areLess jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
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Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
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Re: Unknown polymers
Those are indeed Panasonic FL and as I told you they are lytics, not polymer.
I didn't know you were looking at that style marking on SMD caps.
Matsushita logo is normally only seen on caps with sleeves.Last edited by PCBONEZ; 05-14-2011, 06:51 AM.Mann-Made Global Warming.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
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You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: Unknown polymers
Sleeves are only a way to mark caps. That's all.
Doesn't tell you what technology they are.
Ages ago MOST caps were marked by direct printing on the end [or side] like like that FL you took apart.
Polymer caps didn't even exist yet.
Then they developed heat-shrinkable plastics and started using sleeves to mark caps because it was cheaper and easier in an assembly line situation.
Since then advances in printing technology and automated equipment has made direct printing cheaper than and as easy as using sleeves -but- there are scads of already existing cap sleeving equipment that is already paid for or for sale cheap.
Having a sleeve or not is NOT a reliable way to tell if you are looking at a lytic or a poly.
- Sanyo OS-CON Polymers typically [historically] have sleeves.
- Nichicon HD series radial Electrolytics without sleeves show up all the time.
[I see HD like that off-on in all ages of equipment. I suspect one of Nichicon's factories simply doesn't sleeve the HD series so some % of their HD production is sleeveless but it could be some kind of special order too, not sure.]
- There are other examples if you look around...
Having a top vent or not isn't 100% reliable either.
- If they consider it small enough [or the chemistry is such that] it isn't likely to explode from gas formation they won't use a vent.
- Hybrid Polymers [aka Functional Polymers] often have vents because in addition to the polymer they still have some wet electrolyte.
- Some SMD's have a vent method built into the base which you will never see.
- I've also seen mechanical drawings of cap construction that for the small [5-6mm] cans showed vents pressed into the sides of the can where it would be under the sleeve. The idea is the gas will pass between the sleeve and the can.
-- So, there's a few times when no vent on top doesn't mean no vent at all.
The Panny FL you just dissected breaks all the 'rules'.
That's because they aren't actually rules, they are just typical.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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