Can anyone identify this manufacturer? We're finding a rash of these caps bad. I've dissected a few of them and found the internals dry and the leads corroded away.
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Re: Bad caps beyond computers
The logo doesn't look familiar to me. Usually, axial leaded parts are GP types, not the better quality low impedance types. Sounds like some mfr's materials and/or processes are so poor that their parts are scarcely adequate to be
paper weights .
PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
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To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
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Re: Bad caps beyond computers
thats a new one for me.
what is it from?Comment
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Re: Bad caps beyond computers
The cap is out of a power supply. It's part of a half wave rectifier circuit and parallels a zener diode. Inside the cap we found the positive lead had corroded away where it attaches to the aluminum plate. It also seemed dry as compared to a good cap.
Possibly overcharged or just defective?Comment
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Re: Bad caps beyond computers
That axial cap says "ST" on it. Probably some shitty generic manufacturer.My gaming PC:
AMD Phenom II X6 1100T Black Edition 3.3GHz Six-Core CPU (Socket AM3)
ASUS M4A77TD AMD 770 AM3 Motherboard
PowerColor AMD Radeon RX 480 8GB GDDR5 PCI-Express x16 3.0 Graphics Card
G.SKILL Value Series 16GB DDR3-1333 RAM (4x4GB dual channel)
TOSHIBA DT01ACA200 2TB 3.5" SATA HDD (x2)
WD Caviar Green WD20EARX 2TB 3.5" SATA HDD
ASUS Xonar DG 5.1 Channel PCI sound card
Antec HCG-750M 750W ATX12V v2.32 80 PLUS BRONZE Power Supply
Antec Three Hundred Mid-Tower Case
Microsoft Windows 10 Pro 64-bit
Microsoft Windows 7 Ultimate SP1 64-bitComment
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Re: Bad caps beyond computers
found one ST manufacturer but the logo is not the same.
Nantong Xingchen Electronic Co., Ltd.
http://en.ntxc.cnComment
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Re: Bad caps beyond computers
likely a poor quality cap or too much heat.Originally posted by GoldHEMI
had a zenith tv in today with short vertical sweep.
had a la7838 on a tiny heatsink with the pump up cap against it.
2 years of that killed a rubycon 105 c rated cap.
the thing runs so hot it browned the board.
i added a bigger heatsink while i was in it.
its a special hospital tv so they cant afford to toss these.
even with aspirin at 25.00 a dose.Comment
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I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
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Hello!
I have two projects on my work bench. One is a friends dead JBL Xtreme speaker with a blown voltage regulator and corresponding bulged and shorted cap. That cap has clear markings so I know what replacement I need for it.
The other project however is a whole different deal. It's a Zoom 9000 guitar effect from the 90th that has developed a devil hound howl when there is no input from the guitar. I'm guessing caps problem. So, since I don't really use this effect anymore I thought it would be a perfect project to learn on.
I have studied the board and... -
I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,... -
Good evening
I recently aquired a rev 1.1 Gigabyte 60XT, and was suprised of the amount of leaking caps for a motherboard of the P3 era. Especially the way the 330µf caps seems like the housing discolored even.
Now, there are some 3300µF 6.3V KZG series around the CPU. Would it be OK to replace them with something like EEUFR1A332 ? (Panasonic FR 3300µF 10V). Or was this board designed around very low ESR caps?
But I was also suprised about the bigger boys, which are 330µF 25V.
Could it be they used 25V caps because they were cheaper / available at that time?...
Comment