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Series X Ceramic Cap Value (lemmy.world)
submitted 3 months ago by v1605@lemmy.world to c/consolerepair@lemmy.world
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Picked up this Series X to do a trace repair for the hdmi, turns out 2 caps were ripped off the board as well. The one was still partially connected and easy to bodge. The second circled is missing. I'm curious if anyone knows the replacement value.

The similar caps in the area all read between 18.6 to 19.6 uf when out of circuit, so it could be a few values (though no guarantee this cap wasn't unique and completely different).

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[-] Godort@lemm.ee 9 points 3 months ago

I don't know the value of the capacitor, but the iFixit page has an image of the board with silkscreening that may help with the search.

The component is labeled as C176 or C178(unsure of the last character as its under that rail.)

[-] v1605@lemmy.world 10 points 3 months ago

Luckily all the c17x are 0603 22uf, 20% caps. Thanks for pointing me to the image so I could compare it to the schematics. Now I have to go through and look for others. No idea how this could have even happened.

[-] riplin@lemm.ee 7 points 3 months ago* (last edited 3 months ago)

Looks like a decoupling cap. So the value isn’t going to be super critical. If you put in a cap in the same ballpark as the others it should be fine.

Edit: there’s another missing cap above the cap that sits above the one you bodged. A small one. If you count from the large untinned pad on the right next to the edge of the board, left of the 4th tinned pad you will find it.

[-] v1605@lemmy.world 2 points 3 months ago

Good eye, I need to go over the entire board again and look for those. Combined with the other answer that help me with a revision that actually is labeled, you are right. It should be a 22uf 6.3 0603 decoupling cap.

[-] j4k3@lemmy.world 5 points 3 months ago* (last edited 3 months ago)

Not going to be a special value on a BOM. If the footprint is the same as the ones you replaced, it will likely be the same. No bypass cap that already likely has a 5-20% tolerance is likely to have its own pick and place reel slot. If some other value was needed, it would be one of the other footprints and a cap that matches somewhere else on the board.

[-] v1605@lemmy.world 3 points 3 months ago

Yeah that makes sense, Microsoft is definitely going to keep costs down and not switch out those reels. Based on the other info, these are 22uf 20%, so in spec with the others I've measured.

this post was submitted on 30 Jul 2024
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