VOGONS


First post, by Kahenraz

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While trying to find a used ATI Radeon 7200 on eBay, the cards I had ordered ended up arriving damaged; both of them. I thought about writing this as two separate threads but the content would have been almost identical so I'm merging it into one. The issue is that some of the SMD capacitors on the back had broken off. This is a common fault when cards are stacked on top of each other or tossed in a bin and the sheering force of another component rips another one off or crushes them in place. See here for another repair of GeForce Ti 4200 which had 12 damaged SMD capacitors opposite the GPU die.

Both cards are the same part number and model but have some minor differences such as a revised heat sink design, tantalums swapped for what I think are polymer capacitors, and a different revision to the ATI Rage Theater chip. Both cards have the same BIOS sticker and memory configuration. I wasn't able to spot any other differences.

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See the next post for the repair log for the first card.

Last edited by Kahenraz on 2021-12-21, 20:33. Edited 1 time in total.

Reply 1 of 5, by Kahenraz

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The first card I worked on was the one with the older heatsink design. I can only assume that this card is also the older revision as it also has a lower number on the ATI Rage Theater chip. The fault on this card was a single SMD capacitor on the rear, as denoted by the red sticker.

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Last edited by Kahenraz on 2021-12-21, 09:31. Edited 1 time in total.

Reply 2 of 5, by Kahenraz

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I removed an adjacent capacitor to measure what will hopefully be a similar value. It measured as 0.1uF (100nF) and is a 0805 ceramic capacitor, likely a bypass capacitor. Removal of the adjacent capacitor done with hot air and all pads were cleaned with a soldering iron and copper braid. The replacement components were affixed with solder paste and hot air.

This was a very simple repair. It would be difficult to spot if you didn't know it was there.

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Last edited by Kahenraz on 2021-12-21, 10:11. Edited 2 times in total.

Reply 3 of 5, by Kahenraz

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The second card had a similar fault as the first with a 100nF 0805 having been broken off in a different location but there was also a second capacitor that had been broken off as well. Note that there is actually a scratch visible on the PCB where whatever had impacted it caused some minor damage to the green solder mask.

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Last edited by Kahenraz on 2021-12-21, 20:34. Edited 3 times in total.

Reply 4 of 5, by Kahenraz

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I had already cleaned and prepped both sets of pads but while placing the second component realized that I had made a mistake. The second capacitor, located beneath the GPU, was not a 0805 but a 0603 (it's smaller) and was probably a different capacitance as well. I removed the adjacent capacitor and found that it was 10nF and not 100nF like the other. If you have seen my GeForce 4 Ti 4200 repair you may remember that the capacitors beneath that GPU die were 100pF 0402 capacitors. Which kind of components are used varies by design so it's important to find some point of reference to compare even if the physical size is identical.

This repair was also very straightforward and there were no issues.

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Last edited by Kahenraz on 2021-12-21, 09:47. Edited 1 time in total.

Reply 5 of 5, by Kahenraz

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Both cards work great after repair. The card with the single missing 0805 was tested and sold as working but I don't recall if this was the case and I forgot to verify it before repair. The second card with the broken 0603 capacitor beneath the GPU did not work. Both cards now test as working and repaired.

Of note, the older revision with the silver aluminum-backed heatsink fan was obnoxiously loud. I have a Rage Fury MAXX which has two of these same heatsinks on it and it's more of the same but twice as annoying. I don't know if this is normal or if this is due to age but the newer all-black heatsink fan was sill audible but much quieter by comparison. If you want to get an early Radeon then this is the one I would recommend. Also, the picture was also noticeably nosier (equally poor on both cards) than my ATI Rage 128 Pro. This is somewhat mitigated by the addition of a DVI port.

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