VOGONS


First post, by Jofo

User metadata
Rank Newbie
Rank
Newbie

Hello all!

I got hands on a rather sorry-looking Banshee by Creative, the poor girl has several parts knocked off and I have no idea what values they should be

banshee.png

2020-0510-051627-012.jpg
2020-0510-051610-011.jpg
2020-0510-042305-007.jpg
2020-0510-042151-005.jpg

What is missing:
Near VGA port:
L1 = ?

Above the GPU:
C40 = ?
RP7 = 33 OHM 4-stage resistor array in 1206 package
C47 = ?
C48 = ?
R47 (seems only re-seating might be needed)

Near one of the memory chips:
C113 = 0.1uF 0603 package

The card is also scratched on several places on the back, but traces seem fine. So far I was able to identify that RP7 should be a 33OHM resistor network in 1206 package based on the card's pictures online and measurements, and after digging in the memory chip datasheet I've found that the capacitor value for C113 could be 0.1 uF as it's positioned between Vddq and Vssq

capacitance.png

However, I have no idea what are the values of the other components. Especially the L1 near the VGA port.

Any help greatly appreciated. Thank you

Reply 1 of 1, by andrea

User metadata
Rank Member
Rank
Member

For L1 just put a zero ohm link in its place. The ferrites inline with the signal are pretty much only there for EMI compliance.
In fact a quick and effective fix for cards with muddy VGA out (I've done it myself on a couple of ViRGEs) is to jumper the ferrites and remove any caps between the video signal and ground.

As for the other caps I feel like you can't go wrong with 100nf.

Do you happen to have some scrap cards you can salvage for parts? then use the closest parts you have. For the resistor networks, for example, 22 or 47 ohm will work just the same.