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
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.
tehsiggi wrote on Today, 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 […]
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.
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.
