Does anything less than 470uF or 1000uF usually bulge ?
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Re: Does anything less than 470uF usually bulge?
Usually ones below 470uF dont cause problems, but I have another way of determining if it will cause problems.
If it has a vent etched into the top, I usually inspect it.A man convinced against his will is of the same opinion still. -
Re: Does anything less than 470uF usually bulge?
I've seen 100uf up bulge. If it has a vent, it can bulge. No vent=mess.Comment
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Re: Does anything less than 470uF usually bulge?
its less likely but by "no means rule it out", its still very possible
As with any cap it depends on the circuit and how its being used (or abused) heat around it etc
Type of brand/series also is it crap brand cap.
So as above at lest check/test them.
Cheers
You step into the Road, and if you don't keep your feet, there is no knowing where you may be swept off to." Bilbo Baggins ...Comment
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Re: Does anything less than 470uF usually bulge?
They usually don't vent, but since they are so small there is so little gas that could possibly build up so even if they have failed they still may not bulge..."The one who says it cannot be done should never interrupt the one who is doing it."Comment
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Re: Does anything less than 470uF usually bulge?
1000uF bulging is very common.
Like everyone else said about the 470's, it less likely but it happens.
As I recall some of the 470uF you asked about in the other thread are 8mm.
An 8mm 470 is -probably- more likely to bulge than say a 5mm 470.
Failed caps don't always bulge.
But bulged caps are always failed.
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Re: Does anything less than 470uF usually bulge?
A nice conclusion!!Originally posted by PCBONEZ
ESR meter or caps meter are always our best tool. Need to check the old caps by these meters even it is a good caps brand.Comment
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Re: Does anything less than 470uF usually bulge?
I've seen a lot of LELON 470uF and 220uF caps fail. However, as a rule, caps below 1000uF tend not to fail. A lot depends on the brand, LELON being the most common for sub-1000uF caps failing.<--- Badcaps.net Founder
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Re: Does anything less than 470uF usually bulge?
Right now in my "to do" boxes I have
2 bloated leaking 470/16v [8mm] Elite on an LCD inverter board.
2 bloated leaking 470/16v [8mm] Fuhjyyu (1 each in 2 different) Antec power supplies.
4 slightly plump 220/10v [6mm] Chhsi (2 each in 2 different) MSI boards.
And something between 100 and 200 various 1000uF to do.
The small ones bloat just not as often as larger caps.
.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
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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: Does anything less than 470uF usually bulge?
Oops, brain fart...
The 470uF Fuhjyyu in the Antecs are 25v.
.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
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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: Does anything less than 470uF usually bulge?
IMO, any of the Fuh-kyoo caps should be replaced as a matter of course.
Pure junk.Comment
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Re: Does anything less than 470uF usually bulge?
Well if it was me I wouldYou step into the Road, and if you don't keep your feet, there is no knowing where you may be swept off to." Bilbo Baggins ...Comment
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Re: Does anything less than 470uF usually bulge?
What about 0.1uF electrolytics?
Why do they use electrolytics that small instead of ceramics?Comment
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Re: Does anything less than 470uF usually bulge?
Been wondering that myself and haven't figured it out yet.Originally posted by larrymoencurly
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That's a good enough theory question to warrant it's own thread so I made one here:
https://www.badcaps.net/forum/showthread.php?p=85736
.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
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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: Does anything less than 470uF usually bulge?
I had bulging 470uF Hermei in an LCD monitor
But I also replaced the 22uF and 1uF Elites with Rubycons anyway
I guess the only real way to know is with the ESR and capacitance meter... (which I don't have yet) so I just replaced the lot. Makes me feel better anyway"Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHornComment
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Re: Does anything less than 470uF usually bulge?
I've had multiple 100uF and 220uF bulgers on different boards.
Usually Intel boards where they used 85c for the small diameter caps compounded by poor cooling from clogged fans.Last edited by PCBONEZ; 11-08-2009, 12:56 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.
- 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: Does anything less than 470uF usually bulge?
2 Reasons that come to mind.Originally posted by larrymoencurly
1 So they will fail
2 because eletrolytics tend to have less resistance across them over ceramics.Comment
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Re: Does anything less than 470uF usually bulge?
With LCD monitor repairs I find it quite common pulling badly bulged 470uf and 1000uf caps, especially those that are physically small for their designed capacitance. I also have observed bad caps down to 1uf, but I would agree apparent bulging in low farad cans is not common, vented or not.
But if you're thinking of leaving small caps on the board, consider that testing of the caps I've pulled, shows a good 50 % test OK with a good ESR meter...so why did I pull them ? Its like when a good mechanic tears and engine down for repairs, he doesn't just replace one valve or one ring or one bearing, he replaces them all for much increased life and reliability for a minimum of expense while the job is being done. So the extra few minutes and that extra buck or two replacing those caps on your board, will pay off in the long haul. Besides where's the fun... if you cut and run ?Comment
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Re: Does anything less than 470uF usually bulge?
just had an itox mobo with 220/16 and 470/6.3 ost badly bulged and bottoms blown out.no vents.the bung was the vent.Comment
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Re: Does anything less than 470uF usually bulge?
Weird - isn't ITOX a long-life brand? I'm amazed they'd use OST caps.Originally posted by kc8aduComment
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hi
motherboard toshiba C50 PT10F
i found 2 bad 470uf tantalum in cpu sircuit making short .
but i only have 380uf tantalum can i replace them with electrolytic caps . -
Issue: Panel is partially dark or dimmed, left side is okay (see photos attached).
Trial: Replaced three visibly bad capacitors on the power supply board (see photos).
First result: Monitor worked for two hours only. Two capacitors bulged again.
Diagnosis: After replacing those capacitors the monitor was connected via HDMI cable to a laptop. Laptop was connected to power supply and charging. Power cable was removed from the laptop end and put back. Maybe this was a coincidence but since unplugging the power cable it was noted that the panel had darkened... -
I'm looking for suggestions for electrolytics that are 10mm diameter and up to 25mm tall, through-hole radial capacitors with 5mm lead spacing. The value needs to be in the range of 330uF to 470uF. I typically use 35v caps due to their lower ESR vs 16v caps. Currently, the Panasonic FC is being used but the FM series is under consideration.
This is for the primary side of a switching power supply in a car audio amplifier.
Is there a way to calculate power dissipation in a capacitor to predict which will operate at a lower temperature? For example, a 470uF may have a... -
Just typical LED bar failure repair but discovered a couple of things worthy of posting
PSU had a bulging cap (470uF 25V). Likely AC/DC bridge rectifier filter. Have seen a ton of 470uF bridge rectifier filter failures on a bunch of difference devices (not just TVs) Stock up on 470uF 25v 35v
2nd thing worth of note is after all the work to replace edge lit LEDs. Discovered 2 LEDs with phosphor coating differnce produing slightly differnet color temp. Result on edge lit TV = dark veritical band
Can't detect when testing the LED bar along...
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Hi,
Found an Funai 32FL553P/10 TV on sale for cheap listed as broken, so I decided to give a shot at reparing this.
State I got it in:
Squealing from the PSU
After logo I get a blank screen
After 10 seconds of having a blank display w/ backlight the TV dies
Give it 7-10ish seconds again and it starts to bootloop.
What I did so far:
Replaced all the caps on the PSU (apart from primaries, they were fine and none at hand)
Checked all voltage rails:
5VSB - 4.8V
AMP+13V - 14.4V
13V - 12.98V (in manual 12V)...
Comment