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  1. #1
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    Recapping a blown motherboard for Terry

    Terry sent over three motherboards that had blown caps and needed fixing. These boards came with good stock caps, i.e Chemicon, Sanyo, Rubycon and Nichion. However, nothing lasts forever and the CPU VRM caps blew out. So far, I've repalced the 4V VRM caps with a bunch of OSCONs I've had (If anybody wants some free Sanyo Caps, send me a pm).

    Some pictures of the work thus far. The missing cap between the replacements is a 6.3V 820uF, which I don't have on hand. Waiting for digikey to ship out the necessary caps.
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  2. #2
    Member vanibanez's Avatar
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    Nice, I've only done dual layered boards so far and some power supplies. Triple layer and higher boards are much harder to repair. I've noticed it's always the capacitors near a heat source (CPU, fets, etc) that seem to pop first.
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  3. #3
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    The trick with multi-layer PCB's is to make liberal use of flux. Check the link in my sig for details.
    Caps near high current devices are the ones prone to failure, so as you said, CPU VRM, DIMM, PCIE and 12V power input areas are the ones to watch out for. I'll be replacing pretty much all the caps on the board.
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    Understanding SMPS Technology
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  4. #4
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    Flux helps all the things! It really does.
    Very clean desoldering, looks like you have significant practice with this!
    I'm surprised the polymers had issues, that's a pretty solid bank of 'em. I suppose two phase CPU power isn't helping, especially if that's a prescott in there.
    "Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe." -- Einstein (maybe)

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  5. #5
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    The polymers are the ones I put in. I forgot to take pics of the blown Chemicon's and the Nichion. As for practice, yes I've had loads of practice with soldering/desoldering electronics, part of the game when you are an experimental physicist (electronics plays an integral role in our work).
    Motherboard Repair Tutorial || Power Supply Repair Tutorial || A Closer Look at PSU Signals ||
    Understanding SMPS Technology
    || ASUS P5K Capacitor mod || Kernel Compile Guide || Guide to Wiping an SSD

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  6. #6
    Super interesting. Please post more pictures as the work progresses!

  7. #7
    Member vanibanez's Avatar
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    Quote Originally Posted by Super Nade View Post
    The polymers are the ones I put in. I forgot to take pics of the blown Chemicon's and the Nichion. As for practice, yes I've had loads of practice with soldering/desoldering electronics, part of the game when you are an experimental physicist (electronics plays an integral role in our work).


    Nade,

    You shall forever be known to me as "Sheldon Cooper.....physicist!".
    CPU........AMD Phenom II 1090T@3.87GHz (215x18)
    MB..........Gigabyte 890GPA-UD3H-890GX Ver 2.1
    RAM........G. Skill 4x4GB sniper series @1720(215x8)
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    Case.......AZZA Solano 1000 Blue
    HD..........1xMushkin Chronos 240Gb SSD & 2xSeagate 1TB SATA3
    PS...........Antec TP650w




    "I would if I could....but I can't, so I won't"

  8. #8
    SU(3) Moderator
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    I wish you had said Sheldon Glashow instead.
    Motherboard Repair Tutorial || Power Supply Repair Tutorial || A Closer Look at PSU Signals ||
    Understanding SMPS Technology
    || ASUS P5K Capacitor mod || Kernel Compile Guide || Guide to Wiping an SSD

    Build in progress
    ASUS Maximus Hero || i5-4670K || Crucial M500-480Gb || Antec HCP-850M || ASUS GTX 750Ti || Carbide 300R || Coolermaster Glacer 240L

  9. #9
    Member vanibanez's Avatar
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    Quote Originally Posted by Super Nade View Post
    I wish you had said Sheldon Glashow instead.
    Agreed, but the reference stands .
    CPU........AMD Phenom II 1090T@3.87GHz (215x18)
    MB..........Gigabyte 890GPA-UD3H-890GX Ver 2.1
    RAM........G. Skill 4x4GB sniper series @1720(215x8)
    Vid..........Sapphire HD6870 GPU 1Ghz Mem 1250Mhz
    Case.......AZZA Solano 1000 Blue
    HD..........1xMushkin Chronos 240Gb SSD & 2xSeagate 1TB SATA3
    PS...........Antec TP650w




    "I would if I could....but I can't, so I won't"

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