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Radeon 9800 Pro AIW - Identify component

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First post, by gabimor

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Hi guys, thanks for reading this post.

Can you help me identify the marked component in the attached picture?

I have a Radeon 9800 Pro AIW like this, but the component is physically damaged.

Thank you

Reply 1 of 21, by tehsiggi

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You have marked two components.
These appear to be diodes from what I could see on other pictures (from VGA museum).
However there is no marking readable on any pictures that I have found.
On a regular Radeon 9800, there are two diodes, D2 and D3 in the same region.

You can easily determine if the diodes are what I suspect.
You can measure if any of the diode pins goes to the 3.3V AGP power. I marked a corresponding pin blue at the AGP connector in the picture.
Both diodes should have one pin connected to 3.3V.
The other pins should go to VDDC and VDDC_CT respectively. You can check if a pin of those two diodes is connected to the green marked spot, that should be VDDC. The other diode should have her second pin connected to the violet marked spot, which would be VDDC_CT.

Most of the layout of the AIW card region around GPU and Memory is the same to the regular 9800s, so I'm fairly confident in those probing points.

If you can confirm these connections are in place, you can replace D2 (between 3.3V and VDDC_CT) with a 1.8V Zener diode. D3 (between 3.3V and VDDC) with a 2.4V Zener diode. Size should be SOD123 or SOD323, I can measure that tomorrow.

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Reply 2 of 21, by gabimor

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tehsiggi wrote on 2025-09-17, 19:29:
You have marked two components. These appear to be diodes from what I could see on other pictures (from VGA museum). However th […]
Show full quote

You have marked two components.
These appear to be diodes from what I could see on other pictures (from VGA museum).
However there is no marking readable on any pictures that I have found.
On a regular Radeon 9800, there are two diodes, D2 and D3 in the same region.

You can easily determine if the diodes are what I suspect.
You can measure if any of the diode pins goes to the 3.3V AGP power. I marked a corresponding pin blue at the AGP connector in the picture.
Both diodes should have one pin connected to 3.3V.
The other pins should go to VDDC and VDDC_CT respectively. You can check if a pin of those two diodes is connected to the green marked spot, that should be VDDC. The other diode should have her second pin connected to the violet marked spot, which would be VDDC_CT.

Most of the layout of the AIW card region around GPU and Memory is the same to the regular 9800s, so I'm fairly confident in those probing points.

If you can confirm these connections are in place, you can replace D2 (between 3.3V and VDDC_CT) with a 1.8V Zener diode. D3 (between 3.3V and VDDC) with a 2.4V Zener diode. Size should be SOD123 or SOD323, I can measure that tomorrow.

Hello tehsiggi,

I don't know if it helps, but I tried to show the components in the linked pictures.

https://ibb.co/album/JW56Pq

I will try to measure, like you explained, but I'm not good with electronics.

I can replace components, but I have to learn how to do what you explained. I'll try carefully.

Is the missing one in the picture D2 or D3?

And to me, maybe the other one is broken too, cause looks like it's physically damaged.

Thank you ver much for your help.

Reply 3 of 21, by tehsiggi

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Both appear to be defective. Let me try to get some more info on the AIW schematics and I'll see what i can come back with.

I'll then add some instructions how to measure as well.

Thanks for for the pictures as well!

Update

Looking at your pictures now, I'm more leaning in the direction that these are not D2 and D3. The traces are very small and there are other diodes that may fit that role better. Also with your pictures and pictures from AIW cards I've found (like the 9600) it appears like these could be inductors for filtering of more low power signals.

I'm still looking further though, but did you try to run the card? If it's only for the AIW part, the rest of the card should probably work just fine.

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Reply 4 of 21, by Karbist

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Tiny inductors

The attachment inductor.jpg is no longer available

you can temporary solder a tiny wire on the pads.

Reply 5 of 21, by tehsiggi

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Then they are for power filtering. Thanks for the picture @Karbist!

Without them, the Theater200 Chip will very likely not be fully powered, meaning the TV/VIVO part will not work properly.

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Reply 6 of 21, by gabimor

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Karbist wrote on Yesterday, 10:28:

Tiny inductors

The attachment inductor.jpg is no longer available

you can temporary solder a tiny wire on the pads.

Thank you for your support, Karbist!

The pictures helped!

Reply 7 of 21, by gabimor

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tehsiggi wrote on Yesterday, 04:12:
Both appear to be defective. Let me try to get some more info on the AIW schematics and I'll see what i can come back with. […]
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Both appear to be defective. Let me try to get some more info on the AIW schematics and I'll see what i can come back with.

I'll then add some instructions how to measure as well.

Thanks for for the pictures as well!

Update

Looking at your pictures now, I'm more leaning in the direction that these are not D2 and D3. The traces are very small and there are other diodes that may fit that role better. Also with your pictures and pictures from AIW cards I've found (like the 9600) it appears like these could be inductors for filtering of more low power signals.

I'm still looking further though, but did you try to run the card? If it's only for the AIW part, the rest of the card should probably work just fine.

I bought this card about 2 months ago and it was working.

Then, I was starting to clean the card and noted this tiny component was broken.

I don't know if I broke it, or if it was broken before, or almost broken.

Worried about it, I tested the card again and it was full of artifacts. Don't remember the pattern.

This can be an indcutor, cause i noted some wire in the rest of the broken component.

I'm trying to identify the component to ressolder, cause I think I can do it.

The idea is to solder the component to test the card again and, if it doesn't work, it's game over.

Thank you for helping me, tehsiggi.

Edit: Looking again, I don't know if it is an indcutor. It's too small.
Edit 2: I was comparing the totally broken one with the partially broken, that I thought it was intact and looks like a diode. That's why I said it was too small to be an inductor.

Last edited by gabimor on 2025-09-18, 11:36. Edited 2 times in total.

Reply 8 of 21, by gabimor

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Karbist wrote on Yesterday, 10:28:

Tiny inductors

The attachment inductor.jpg is no longer available

you can temporary solder a tiny wire on the pads.

I can try it in the weekend.

Do you know what indcutor is it?

I think I can buy in Aliexpress.

Thank you for helping me, Karbist!!

Edit: Looking again, I don't know if it is an indcutor. It's too small.
Edit 2: I was comparing the totally broken one with the partially broken, that I thought it was intact and looks like a diode. That's why I said it was too small to be an inductor.

Last edited by gabimor on 2025-09-18, 11:36. Edited 2 times in total.

Reply 9 of 21, by tehsiggi

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If you want to replace the inductors, the older rage theater chips use 3.3µH inductors for power filtering.
You'll just need to find one with a fitting footprint. The old rage theater chips consume at max 125mA on their filtered separate 3.3V power.

I highly suspect this is related to the Theater200 only.
You can bridge the missing parts for now with a wire, as mentioned by Karbist. I'd do that before ordering any parts.
However I'd be surprised if that is the cause of the artifacts. I'm looking forward to your findings!

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Reply 10 of 21, by gabimor

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tehsiggi wrote on Yesterday, 11:12:
If you want to replace the inductors, the older rage theater chips use 3.3µH inductors for power filtering. You'll just need to […]
Show full quote

If you want to replace the inductors, the older rage theater chips use 3.3µH inductors for power filtering.
You'll just need to find one with a fitting footprint. The old rage theater chips consume at max 125mA on their filtered separate 3.3V power.

I highly suspect this is related to the Theater200 only.
You can bridge the missing parts for now with a wire, as mentioned by Karbist. I'd do that before ordering any parts.
However I'd be surprised if that is the cause of the artifacts. I'm looking forward to your findings!

Looking again, I don't know if it is an indcutor. It's too small....

If you think this is not the cause of the artifacts, you're probably right, but I would like to replace the components to see.

Reply 11 of 21, by tehsiggi

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Inductors can be tiny! From the picture of Karbist, it's clearly an inductor, both of them.
Bridge the pad with a small wire instead of the inductor and see if that makes a difference.

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Reply 12 of 21, by gabimor

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tehsiggi wrote on Yesterday, 11:21:

Inductors can be tiny! From the picture of Karbist, it's clearly an inductor, both of them.
Bridge the pad with a small wire instead of the inductor and see if that makes a difference.

Two new pictures:

https://ibb.co/album/B2cGg1

Now I think Karbist is right.

Looks like a "closed inductor". Don't know the specs.

Basically, the three marked components are the same.

And there is only one intact, in the second picture.

So I need to by two components like the one that is intact.

Thank you tehsiggi and Karbist!!

Reply 15 of 21, by shevalier

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My opinion almost very "alternative" 😀
Solder any ferrite bead from any donor
It's better option than wire

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Reply 16 of 21, by gabimor

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shevalier wrote on Yesterday, 14:43:

My opinion almost very "alternative" 😀
Solder any ferrite bead from any donor
It's better option than wire

Looks a good idea, but I have found a very cheap 1210 220uh inductor in my region, made by Murata.

Thank you for trying to help!!

Reply 17 of 21, by gabimor

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tehsiggi wrote on Yesterday, 13:23:

1210 should fit just fine.

Yes, and I will buy a 1210 220uh inductor.

Not 330uh like you suggested, but I don't think this will made a big difference.

Thank you very much for all your support.

Reply 19 of 21, by gabimor

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tehsiggi wrote on Yesterday, 19:43:

I suggested 3.3uH, not 330.

Cheers

What a big misread, sorry.

I'll try to find an inductor of 3.3uh or close.

I found 22uh, but looks like it's so much.

I'm sure I'll find something closer to the suggested spec.

Thank you, again!