Found this big blue balloon component in a power supply that went bad. Clearly leaked and likely burned out another component (a diode)? Markings appear capacitor-like, but have never seen one like this. And what does "W. Germ" mean? Guessing it means it's a West German manufacturer, since I've never heard of a germanium capacitor.
Finally if it's indeed a capacitor, what type of capacitor would I replace this with?...
Retrogator
New Member
Last Activity: 09-11-2021, 02:37 PM
Joined: 07-09-2019
Location: Lone Star State
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Re: Help with cap spec sheet
Many thanks. Next step is possible memory parity error. That can cause a DMA 04 error. Fun, fun! -
Help with cap spec sheet
Need some advice on a vintage PC restoration project.
Trying to replace four axial caps on an AT&T PC6300 (aka Olivetti) backplane board that gassed and corroded the leads. Thankfully, no damage to the board. They are Ace 47uf 25V electrolytics -40 - 80C range (see pic).
This is an 8088 computer, so can't find the specs for these caps anywhere. I miraculously found a board schematic, but the caps are not depicted.
I replaced with IC 476TTA025M caps that match the capacitance/voltage/temp specs, but not sure they're working (getting a DMA error... -
Re: First Timer - Mystery capacitor identification
Stefan has indeed found the right board.
Sorry it's taken me a while to get back to this project. Attached are pics of the other caps on the board. They all appear to be Nichicon's except...
The previously mentioned KZG's next to the CPU.
These KZE's and the previously mentioned HD near mobo power socket.
[ATTACH]198202[/ATTACH][ATTACH]198203[/ATTACH]
This one Chemicon 25v 22uf SME series in the PCI rails (it's the only SME on the board)
[ATTACH]198204[/ATTACH]...Last edited by Retrogator; 08-04-2019, 02:51 PM.Leave a comment:
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Re: First Timer - Mystery capacitor identification
Didn't pay attention to the sizes, but you're right. There's no space for the 12.5mm's. So many spec details to watch for! Glad to have this forum watching my back!
Copy that on the PSU caps (a Chieftec, so likely the original shipped new with the unit). There's indeed a bulgie in there and also a semi-burned power resistor. I'll post a pic of that too.
Will also inventory the remainder of the caps. Close visual inspection, they all look ok (top and bottom), but will inventory the series of each.Leave a comment:
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Re: First Timer - Mystery capacitor identification
Never mind on the Nichicon HD series. I found this:
Alternatively, was thinking of replacing it with this Panasonic instead: [url]https://www.mouser.com/ProductDetail/667-EEU-FM1A152L[/url]
However, this one has a higher ripple current spec than the Nichicon. Is it ok to replace cap with one that has a higher ripple?
Still have question about replacing all caps or just bad ones.
Thanks, all!Re: First Timer - Mystery capacitor ...n the NichiconLast edited by Retrogator; 07-12-2019, 10:34 AM.Leave a comment:
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Re: First Timer - Mystery capacitor identification
Thanks on the Nichicon ident. I can't seem to find a specific "HD" series on their website. There is a newer UHD, which looks possible, but without knowing the original HD specs, hard to tell. Will UHD work as a replacement for it?
Do you recommend replacing all caps when recapping a mobo or just the ones that show bad (bulging, gassing, etc)?
Agreed on the mobo pedigree, but the entire rig cost $7 so hard to beat the price. If nothing else, it will be good recapping practice before attempting...Leave a comment:
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First Timer - Mystery capacitor identification
Hello all. First post on this forum. Am resurrecting an Alienware tower I acquired at an estate sale. This is the first time changing out caps, and need some guidance.
The mobo is an Intel D850MV/D850EMV2 with a few bulging caps. A couple are 3300uF/6.3v KZG series, which I plan to swap for Panasonic EEU-FM0J332.
However, this silver one is a mystery. The logo sort of matches an old G-Luxon, but I can't find the series anywhere. Was thinking about swapping for EEU-FM1A152L, which has similar ESR/Ripple specs as the KZG replacement above. Thoughts?
...Last edited by Retrogator; 07-11-2019, 10:31 AM. -
Re: New Members - please post your introductions here
Hello, all! Happy to find a new forum for folks like me who like to repair and refurbish computers. I've been collecting for a while, and have many examples of 80' and 90's computers. Mostly PCs, but several others such as Apples, Amiga and PS/2.
My collection is beginning to show its age, as more and more issues are beginning to crop up. That's where this forum comes in. I found you all while looking for replacement capacitors for a several motherboards and PSUs. Very much looking forward to joining in the fun...Leave a comment:
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