GA-7N400 Total Capacitance question - parallel

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  • retiredcaps
    Badcaps Legend
    • Apr 2010
    • 9271
    #1

    GA-7N400 Total Capacitance question - parallel

    A friend's computer recently died. It is a Gigabyte GA-7N400.

    There are 3 Sanyo caps around the CPU that are obviously bloated (see pic).

    EC47 - 1500uF 16V Sanyo WG
    EC52 - 3300uF 6.3V Sanyo WG
    EC53 - 3300uF 6.3V Sanyo WG

    As you can see in the pic EC51 and EC56 are empty. Now the local electronic stores don't carry low ESR caps, but I do have three Nichicon HZ(M) 2200uF 10V caps in stock. Canada Post is on strike as well so getting caps via mail/customs is a crapshoot.

    I measured and verified that I have continuity between EC51, EC52, EC53 and E56.

    1) Can I correctly assume that EC51, EC52, EC53 and E56 are in parallel?

    2) If yes, can I use three Nichicon HZ(M) 2200uF 10V caps in place of two 3300uF 6.3 Sanyo WG caps? The total capacitance would be 6600uF.

    3) Do you think I will be able to punch a hole through the EC56 eyelets so I can get the cap in thru hole?

    4) I also don't have a 1500uF 16V cap. I do have a 2200uF 16V Nichicon HZ(M) and I KNOW I should keep the capacitance the same, but given the postal strike what are your thoughts about going up in capacitance on a motherboard?
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    • PCBONEZ
      Grumpy Old Fart
      • Aug 2005
      • 10661
      • USA
      #2
      Re: GA-7N400 Total Capacitance question - parallel

      1) If you have 0 ohms between the + legs ~and~ 0 ohms between the - legs then they are in parallel.

      2) If the HZ has enough lower ESR I think that would be okay. Probably does.

      3) Solder iron + SS needle method.

      4) If that's VRM to CPU it should work okay.
      *Slight* chance the PSU will sense a short when starting up or it will take too long for volts to come up causing PSU to kick itself off. Things would have to be right on the edge of tolerances for that to happen. Not likely to be an issue, just pre-explaining in case you see it to minimize your hair loss.
      .
      Mann-Made Global Warming.
      - We should be more concerned about the Intellectual Climate.
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      Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
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        Comment

        • retiredcaps
          Badcaps Legend
          • Apr 2010
          • 9271
          #3
          Re: GA-7N400 Total Capacitance question - parallel

          Originally posted by PCBONEZ
          1) If you have 0 ohms between the + legs ~and~ 0 ohms between the - legs then they are in parallel.
          Yes, I should have specified 0.0 ohms in my original post.

          4) Not likely to be an issue, just pre-explaining in case you see it to minimize your hair loss.
          Other things in life give me grey hairs. Fixing this type of stuff does not even if I'm struggling.

          Thanks for the confirmation. It is appreciated.
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