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SuperMicro Backplane Capacitor

Discussion in 'Chassis and Enclosures' started by StevenDTX, Feb 16, 2017.

  1. StevenDTX

    StevenDTX Member

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    What does this capacitor do? I ask because I was replacing a dead fan when I accidentally knocked one of these off of the backplane. The hard drive in the slot still functions OK.

    So, I'm just a bit curious. Thanks!

    [​IMG]
     
    #1
  2. mstone

    mstone Active Member

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  3. StevenDTX

    StevenDTX Member

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    Eh..its not that bad.

    1) It still works! Strangely enough.
    2) I could buy a new backplane off ebay for $35.
    3) I could replace the capacitor for $1
    4) I have been thinking about getting a new chassis anyway
     
    #3
  4. yu130960

    yu130960 Member

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    Just replace the capacitor with the same spec capacitor.
     
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  5. Tom5051

    Tom5051 Member

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    Capacitors are generally used to smooth voltage, perhaps in this case for when all the drives spin-up at once. I would just de-solder the cap and replace it. They cost 10 cents or so.
     
    #5
  6. Diavuno

    Diavuno Active Member

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    my thoughts exactly
     
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  7. T_Minus

    T_Minus Moderator

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    For $35 I would sit at my desk and press 'buy now' and then take out the 2? 3? screws and slide the new one in :)

    This way I'm not wasting time soldering or better yet not risking an even bigger failure because I accidentally shorted something by mistake ;) ;)
     
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  8. StevenDTX

    StevenDTX Member

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    Im not going to do anything right now. I still have five unoccupied slots on that server, with really only plans to use two of them.

    I was just more curious as to what its for if the slot still seems to work just fine.
     
    #8
  9. Diavuno

    Diavuno Active Member

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    I have too many old supermicro boxes with perfectly good capacitors to not solder it.

    Or make one of my techs do it, half of them need the experience anyway.
     
    #9
  10. Patriot

    Patriot Moderator

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    So when you slam a drive into a slot hot it causes back EMF that can damage components... that probably absorbs that... It could also be voltage smoothing for spin up.
     
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