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ASUS NCT-D first bad caps after 10 Years !!!

Discussion in 'Repairing Electronics' started by smilem, Mar 3, 2017.

  1. smilem

    smilem Member

    Joined:
    Feb 3, 2009
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    Hello,

    I blow dust out every 6 months and I noticed that my ASUS NCT-D Server motherboard had blown one of the 6.3v 1500uF KZG cap. (marked in red)

    The motherboard however works fine.

    Other caps are OK.

    I made this list off all caps, please suggest what to replace. Should I just replace the blown cap and all 6.3v 1500uF?

    The yellow caps have no brand. What they are?

    P.S. I have Peak ESR70, but the caps can't be measured in circuit, gives me leaky, 0.00mΩ readings
     

    Attached Files:

  2. smilem

    smilem Member

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    Here is my shortlist:

    12pcs 6.3v 1000uf Rubycon YXG - > Rubycon ZLJ 6.3v 1000uf
    6pcs 16v 100uf Rubycon ML - > Rubycon ML 16v 100uf
    27pcs 6.3v 1500uf Nippon Chemi-con KGZ -> PANASONIC ELECTRONIC COMPONENTS EEUFR0J152L
    9pcs 6.3v 470uf Rubycon YXG -> Rubycon ZLJ
    2pcs 16v 1200uf Nippon Chemi-con KZE -> RUBYCON ZL 16ZLK1200M10X20
    1pcs 16v 470uf Rubycon MBZ -> Rubycon ZLJ or WURTH WCAP-PT5H Series 470uf or PANASONIC SEPC 470uf
    4pcs 16v 100uf Lelon RGA -> Rubycon ZLH 16ZLH100MEFC5X11

    Full list attached with polymer caps too.
    Please post your suggestions ASAP.

    The original Yellow caps are polymer, is it needed to replace them given the 10 years, since they do not bulge how to test them?
    Desoldering and measuring is the only way?

    16pcs 2.5v 820uf FUJITSU -> Panasonic Solid Capacitor, OS-CON, SEPC Series farnell.com order code 2354628
    8pcs 16v 330uf FUJITSU -> WCAP-PT5H Series farnell.com order code 2466595
     

    Attached Files:

  3. mdanh2002

    mdanh2002 Member

    Joined:
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    Location:
    Singapore
    You need an ESR meter to test these capacitors in-circuit. Check the surrounding areas, especially around the IC pins, for any signs of electrolyte leak. In my opinion, as long as there are no leaks (the board still looks clean) and the capacitor does not bulge, it is best to leave it the way it is. You will never know what else you might damage during the replacement.
     

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