It's an inductor ~ can't help you with the value unfortunately.

I had this situation with Diamond V1. There is no schematics for it, but there is for V2 from Creative. Should be similar/same value.
Repairing Diamond Monster 3D (Voodoo 4MB) - help needed

It's just for filtering, for testing you can use a piece of wire and the card will work.
It looks like it's used for RAMDAC power filtering, use a ~600R@100MHz ferrite bead, 1206 package, >0.5A.

sdz wrote on 2023-11-28, 19:01:

It's just for filtering, for testing you can use a piece of wire and the card will work.
It looks like it's used for RAMDAC power filtering, use a ~600R@100MHz ferrite bead, 1206 package, >0.5A.

Thank you 😀 I've been following along as well since the 3Dfx Voodoo 1 that I fixed the RAMDAC on still has terrible wobbly video output in 3D mode. It's got random inductors fitted and perhaps they're not the right specification or power output.

How did you determine the value needed?

I measured all the components on two Voodoo 2 cards, and the OG Voodoo has the same RAMDAC.

Voodoo2 component map

sdz wrote on 2023-11-29, 16:56:

I measured all the components on two Voodoo 2 cards, and the OG Voodoo has the same RAMDAC.

Voodoo2 component map

Aha, I hadn't spotted that thread and seen that you have the tools and the knowledge to test these parts accurately - very cool!
I'm only using one of those atmega transistor tester boxes but it's not adequate for testing inductance at least with my current skill level. Thank you for sharing that parts information, we should be able to save many more 3Dfx cards with that info 😀

I was hoping perhaps it was in that schematic for the arcade voodoo1 but the values for the inductors aren't really stated in there from what I can tell.

sdz wrote on 2023-11-28, 19:01:

It's just for filtering, for testing you can use a piece of wire and the card will work.
It looks like it's used for RAMDAC power filtering, use a ~600R@100MHz ferrite bead, 1206 package, >0.5A.

Thank you very much, I'll get required components!

Thermalwrong wrote on 2023-11-29, 17:58:

Aha, I hadn't spotted that thread and seen that you have the tools and the knowledge to test these parts accurately - very cool! […]
Show full quote

sdz wrote on 2023-11-29, 16:56:

I measured all the components on two Voodoo 2 cards, and the OG Voodoo has the same RAMDAC.

Voodoo2 component map

Aha, I hadn't spotted that thread and seen that you have the tools and the knowledge to test these parts accurately - very cool!
I'm only using one of those atmega transistor tester boxes but it's not adequate for testing inductance at least with my current skill level. Thank you for sharing that parts information, we should be able to save many more 3Dfx cards with that info 😀

I was hoping perhaps it was in that schematic for the arcade voodoo1 but the values for the inductors aren't really stated in there from what I can tell.

Hello everyone! I have a Diamond Monster, that appears, costmetically almost perfect... However:

Symptom: Black screen only when 3D activated. Display goes to standby. DOS Tomb raider starts and the computer locks up and cannot ctrl+alt+delete to reboot. Glide diags do not lock up the computer, but still display black screen.

Card condition appears to be very clean, no major scratches or damaged/missing components initially visible under the microscope.

MB: GA5-smm super socket 7 (sis chipset) (i've tried both 100mhz and 66mhz fsb)
RAM: pc100 SDram
Troubleshooting so far:
- Reflowed legs of FBI and TMU
- Microscope inspection didn't reveal any obvious
- RAM chips feel fine, and based on the MOJO output, I don't think they're an issue anyway.

MOJO output appears to show everything is working fine. I've attached MOJO output from my working Orchid Righteous 3D, and the output from the non-working Diamond Monster 3D card, as well as output from the Glide Diag test00.exe that appears to show it's working.

Mojo Output Attached:

WORKING.LOG -> Orchid Righteous 3D mojo output
NOTWORKIN.LOG -> Monster 3D mojo output
NW-TEST0.LOG -> Monster 3D mojo test output from diag test00.exe

These appear to show that the card thinks everything is ok, so i'm suspecting the switch on the card at this point, but any other ideas are appreciated since I'm pretty new to this 😀

Thanks!

mitchkramez wrote on 2024-04-05, 19:51:

Hello everyone! I have a Diamond Monster, that appears, costmetically almost perfect... However: […]
Show full quote

Thermalwrong wrote on 2023-11-29, 17:58:

Aha, I hadn't spotted that thread and seen that you have the tools and the knowledge to test these parts accurately - very cool! […]
Show full quote

sdz wrote on 2023-11-29, 16:56:

I measured all the components on two Voodoo 2 cards, and the OG Voodoo has the same RAMDAC.

Voodoo2 component map

Aha, I hadn't spotted that thread and seen that you have the tools and the knowledge to test these parts accurately - very cool!
I'm only using one of those atmega transistor tester boxes but it's not adequate for testing inductance at least with my current skill level. Thank you for sharing that parts information, we should be able to save many more 3Dfx cards with that info 😀

I was hoping perhaps it was in that schematic for the arcade voodoo1 but the values for the inductors aren't really stated in there from what I can tell.

Hello everyone! I have a Diamond Monster, that appears, costmetically almost perfect... However:

Symptom: Black screen only when 3D activated. Display goes to standby. DOS Tomb raider starts and the computer locks up and cannot ctrl+alt+delete to reboot. Glide diags do not lock up the computer, but still display black screen.

Card condition appears to be very clean, no major scratches or damaged/missing components initially visible under the microscope.

MB: GA5-smm super socket 7 (sis chipset) (i've tried both 100mhz and 66mhz fsb)
RAM: pc100 SDram
Troubleshooting so far:
- Reflowed legs of FBI and TMU
- Microscope inspection didn't reveal any obvious
- RAM chips feel fine, and based on the MOJO output, I don't think they're an issue anyway.

MOJO output appears to show everything is working fine. I've attached MOJO output from my working Orchid Righteous 3D, and the output from the non-working Diamond Monster 3D card, as well as output from the Glide Diag test00.exe that appears to show it's working.

Mojo Output Attached:

WORKING.LOG -> Orchid Righteous 3D mojo output
NOTWORKIN.LOG -> Monster 3D mojo output
NW-TEST0.LOG -> Monster 3D mojo test output from diag test00.exe

These appear to show that the card thinks everything is ok, so i'm suspecting the switch on the card at this point, but any other ideas are appreciated since I'm pretty new to this 😀

Thanks!

While reviewing the card again this evening, I noticed component L9 on the back missing! I grabbed a random filter of a similar size off another board (no idea what the value of this component is) and the card is now KIND OF working! I have repeating glitches in the textures now, not terrible, but noticeable. Time to check the TMU legs and memory chips! Any tips on this?

Success! Reflowing the legs on the memory ICs for the TMU took care of the corruption! Looking and working great now! If anyone knows the value of that L9 filter - let me know! Thanks!

Thank you for the updates 😀 Congrats on fixing the card!
I was thinking looking at the logs initially - "could this be an analog side issue? those logs all look the same / good"
Then you've kind of confirmed that by saying an inductor was missing. Not that I know L9 powers the analog side of the RAMDAC but maybe? Then the repair of the texture memory which was fixed with just reflowing the pins 😀
Excellent repair, thanks for sharing.