Faulty stb/3dfx voodoo 2 repair attempt \ VOGONS

Faulty stb/3dfx voodoo 2 repair attempt

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First post, by matte20

Posted on 2020-09-14, 16:49

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A few years ago I bought a pair of stb 3dfx branded 12mb voodoo2 cards. One had issues while one worked fine. I got my money refunded for the faulty card and was told I could keep it. I bought a 3rd card and that has been working fine.

I saved the faulty one to try to repair at a later time. With 3dfx card pricing through the roof I figured it was time to try to repair it so that I have a spare card. I noticed that it was missing capacitors c26, c33, c50, c65, and the ceramic capacitor on the back side c571. I was able to get the values for the larger capacitors off the other card and install new ones without issue, but I do not know what the c571 values are. Could some one tell me, or point me to the info? I looked at a part list for a creative voodoo2 but it did not match up.

Attached some old photos of what the card was doing. Not sure what is wrong exactly, but I am sure missing components dose not help. I don't really expect to be able to get it working right but figured it is worth trying.

Reply 1 of 9, by DNSDies

Posted on 2020-09-17, 20:32

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On my STB Voodoo2 that doesn't work, C571 is a ceramic bypass capacitor, and has an in-circuit value of 1uf, which means it's probably closer to 0.1uf.

Reply 2 of 9, by matte20

Posted on 2020-09-18, 03:37

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After looking at part diagrams for other 3dfx cards I ordered 100nF 25V x7r ceramic capacitors a couple days ago. Pretty sure that is 0.1uf so sounds like I ordered the right capacitors. Thank you for the info.

Reply 3 of 9, by MaDGyrus

Posted on 2021-08-17, 16:02

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I'm not sure if it's worth a separate topic, but I recently got my hands on the Creative CT6670 V2 card, which is missing a few capacitors. Can anyone help me out with values for those, please?

Thanks.

Reply 4 of 9, by Joakim

Posted on 2021-08-17, 16:24

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Here.

Voodoo 2 component map

Reply 5 of 9, by MaDGyrus

Posted on 2021-08-18, 12:21

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Nice, thanks a lot!

Reply 6 of 9, by Joakim

Posted on 2021-08-18, 15:20

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I asked the same question a while ago. 😀

Reply 7 of 9, by MaDGyrus

Posted on 2021-08-27, 18:46

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Thanks for sharing 😁
I'm also waiting for a v5 5500 with a few leaking caps, will likely need their values as well. If you have something like that for v5 that would be awesome ))

Reply 8 of 9, by Joakim

Posted on 2021-08-27, 19:01

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Oh don't give me credit for that work. I just linked it. 😁

Reply 9 of 9, by Warlord

Posted on 2021-08-27, 19:31

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MaDGyrus wrote on 2021-08-17, 16:02:
I'm not sure if it's worth a separate topic, but I recently got my hands on the Creative CT6670 V2 card, which is missing a few […]
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I'm not sure if it's worth a separate topic, but I recently got my hands on the Creative CT6670 V2 card, which is missing a few capacitors. Can anyone help me out with values for those, please?

Thanks.

scroll down until you see the creative map
Voodoo 2 component map

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