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Old 08-18-2017, 02:59 PM   #861
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Default Re: The Hall of Shame - Badcaps Photo Montage

I guess it is possible for the chemicals in the electrolytic composition to have simply degraded or "aged" after 38+ years (IE, simply reached their EOL). That might account for the failure. If those caps lack pressure relief-vents (and instead rely upon the rubber bungs to vent any excess gas), it makes me wonder what else they're lacking.
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Old 12-29-2017, 12:54 PM   #862
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Default Re: The Hall of Shame - Badcaps Photo Montage



higher res pic

Creative GigaWorks T20 II.

Nasty leakage. Capacitor manufacturer is KFC Taiyo Yuden.

Another channel is working.

Found these from yard sale with price of 1 euro.


[PS. This is my first post, i hope i got it right and this thread is for this kind of posts]
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Old 12-29-2017, 01:03 PM   #863
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Default Re: The Hall of Shame - Badcaps Photo Montage

This is glue that carbonized and probably got conductive.
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Old 12-29-2017, 03:52 PM   #864
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Default Re: The Hall of Shame - Badcaps Photo Montage

Quote:
Originally Posted by goodpsusearch View Post
This is glue that carbonized and probably got conductive.
Yeah. Hmm I wonder is there any change that it has broke any other components. Gonna find out when i change those caps next week. Gonna scratch that hardened carbonized goo with glass fiber brush.
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Old 12-29-2017, 05:57 PM   #865
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Default Re: The Hall of Shame - Badcaps Photo Montage

KFC=lol
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Old 12-31-2017, 04:46 PM   #866
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Default Re: The Hall of Shame - Badcaps Photo Montage

Kfc double lol
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Old 02-08-2018, 09:03 AM   #867
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Default Re: The Hall of Shame - Badcaps Photo Montage

HONSING

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Old 02-08-2018, 02:14 PM   #868
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Default Re: The Hall of Shame - Badcaps Photo Montage

Failure to launch, barely.
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Old 02-14-2018, 07:01 PM   #869
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Default Re: The Hall of Shame - Badcaps Photo Montage

WOW!
Were those caps in an amplifier? And did the power supply greatly overshoot the voltage or something? I just haven't seen electrolytic caps launch like that (or come so close to) in a normal functioning circuit.
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Old 03-10-2018, 05:39 AM   #870
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Default Re: The Hall of Shame - Badcaps Photo Montage

Oh I have a good one! A NAD T752 amp filter capacitor let its goo out. Nice amp but the choice of capacitor is questionable.










Last edited by itachi; 03-10-2018 at 05:42 AM..
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Old 03-10-2018, 05:48 AM   #871
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Default Re: The Hall of Shame - Badcaps Photo Montage

Samxon is usually a good brand so it's kinda uncommon for one to fail.
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Old 03-12-2018, 02:19 PM   #872
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Default Re: The Hall of Shame - Badcaps Photo Montage

The spilled electrolyte from the blown cap looks really cooked. I'm guessing that cap was hot for a long time before blowing up. I'm surprised the PCB cleaned up so well.
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Old 03-22-2018, 08:33 PM   #873
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Default Re: The Hall of Shame - Badcaps Photo Montage

Quote:
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Samxon is usually a good brand so it's kinda uncommon for one to fail.
Not really.
I've seen a lot of their c[r]aps fail, especially in LCD monitors. Only their GD, GT, and RS series are worthwhile. Their genera purpose series, GS, are surprisingly crap too. Even most other crap cap manufacturer tend to have somewhat okay 85C GP caps.

That said, I think there must have been something else wrong to cause those big Samxon caps posted above to vent like they did. Looks like they are filters for the main supply of an amplifier. If they were filtering a linear power supply (i.e. line transformer + bridge rectifier), then I'm inclined to think that perhaps a high line voltage line / power surge must have been the cause. If this is for a device in the US, I'd certainly suggest a house wiring inspection - particularly look for a floating neutral.

Last edited by momaka; 03-22-2018 at 08:41 PM..
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Old 03-25-2018, 03:20 AM   #874
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Default Re: The Hall of Shame - Badcaps Photo Montage

So far I've only seen GF and GK bad, plus two RS 330/25 or something like that I've put into a chinese router. Was running quite hot under constant load 24/7 with line transformer adapter supply for like 5-6 years so I guess that's expected (these small RS only have life of 3 or 4 thousand hours).
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