3Com gigabit switch issues

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  • pentium
    Badcaps Legend
    • Mar 2006
    • 2778
    • Canada
    #1

    3Com gigabit switch issues

    I picked up a 3Com 3C1671600 16-port gigabit switch to upgrade my place to full duplex gigabit and initially it worked fine.
    Then within a few hours it started randomly booting people not only off the wired network, but even the wireless network which was managed by a TrendNet access point.
    I cracked it open expecting bad caps like the linksys 8-port in my room but nope. It's full of nothing but Rubycon's and KGZ Nichicons and none show any signs of failure. I'm stumped as to what's up[ but can't fully write off blame on the switch yet. I didn't get the original 12V AC adapter so I don't know how many amps this thing needs as it's not printed on the underside (it just only states "MAX 3.5A". I plugged it into a bench supply and it only dres 1200ma so I am running it off a 2A power brick right now.
    Are what I'm seeing the signs of the swich not getting enough juice or something else?
    Find Nedry!


    Check the Vending machines!!

    <----Computer says I need more beer.
    Tags: None
    • Scenic
      o.O
      • Sep 2007
      • 2642
      • Germany
      #2
      Re: 3Com gigabit switch issues

      KZG = replace on sight

        Comment

        • severach
          Badcaps Legend
          • Aug 2007
          • 1055
          • USA
          #3
          Re: 3Com gigabit switch issues

          Pictures, a ripple scan with a scope, or an in circuit ESR scan. The more you can supply the better.
          sig files are for morons

            Comment

            • Pyr0Beast
              Badcaps Veteran
              • Feb 2009
              • 406
              #4
              Re: 3Com gigabit switch issues

              External AC adapter might also be the culprit. They aren't exactly reliable.

                Comment

                • PCBONEZ
                  Grumpy Old Fart
                  • Aug 2005
                  • 10661
                  • USA
                  #5
                  Re: 3Com gigabit switch issues

                  When did Nichicon launch a KGZ series?

                  See if Power-'in' has a fuse on the board and use that as your guide.

                  .
                  Mann-Made Global Warming.
                  - We should be more concerned about the Intellectual Climate.
                  -
                  Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
                  - Dr Seuss
                  -
                  You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                  -

                    Comment

                    • pentium
                      Badcaps Legend
                      • Mar 2006
                      • 2778
                      • Canada
                      #6
                      Re: 3Com gigabit switch issues

                      I'm totally confused about your mentions o the KGZ's.
                      So either they are a bad bad model or they don't really exist.
                      Find Nedry!


                      Check the Vending machines!!

                      <----Computer says I need more beer.

                        Comment

                        • PCBONEZ
                          Grumpy Old Fart
                          • Aug 2005
                          • 10661
                          • USA
                          #7
                          Re: 3Com gigabit switch issues

                          I've never seen a Nichicon KGZ,,, but apparently you have...
                          Read -your own- post... the first one...

                          ""It's full of nothing but Rubycon's and KGZ Nichicons""

                          .
                          Mann-Made Global Warming.
                          - We should be more concerned about the Intellectual Climate.
                          -
                          Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
                          - Dr Seuss
                          -
                          You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                          -

                            Comment

                            • pentium
                              Badcaps Legend
                              • Mar 2006
                              • 2778
                              • Canada
                              #8
                              Re: 3Com gigabit switch issues

                              Blammo.



                              KZG

                              Dumb me didn't read the series name right
                              Last edited by pentium; 04-04-2011, 11:51 PM.
                              Find Nedry!


                              Check the Vending machines!!

                              <----Computer says I need more beer.

                                Comment

                                • Uranium-235
                                  Comrade Glimmer
                                  • Aug 2007
                                  • 5042
                                  • US
                                  #9
                                  Re: 3Com gigabit switch issues

                                  those labeled nichicon are...just nichicons but they look kinda fake, but I don't think they are from the research I just did 5 seconds ago

                                  keep the nichicon, replace all the kgz's
                                  Cap Datasheet Depot: http://www.paullinebarger.net/DS/
                                  ^If you have datasheets not listed PM me

                                    Comment

                                    • PCBONEZ
                                      Grumpy Old Fart
                                      • Aug 2005
                                      • 10661
                                      • USA
                                      #10
                                      Re: 3Com gigabit switch issues

                                      Originally posted by pentium
                                      Blammo.



                                      KZG

                                      Dumb me didn't read the series name right
                                      I don't see -any- Nichicon in that photo at all..
                                      .
                                      Mann-Made Global Warming.
                                      - We should be more concerned about the Intellectual Climate.
                                      -
                                      Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
                                      - Dr Seuss
                                      -
                                      You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                                      -

                                        Comment

                                        • Scenic
                                          o.O
                                          • Sep 2007
                                          • 2642
                                          • Germany
                                          #11
                                          Re: 3Com gigabit switch issues

                                          the 2 brown ones in the back, one pretty much dead center and the one closest to the front. All nichicon. (those with vertical markings)

                                          i'd replace the chemicon KZG's and see if that fixes it. i bet it will..

                                            Comment

                                            • PCBONEZ
                                              Grumpy Old Fart
                                              • Aug 2005
                                              • 10661
                                              • USA
                                              #12
                                              Re: 3Com gigabit switch issues

                                              OH,, so that's what a Nichicon KGZ looks like.
                                              Mann-Made Global Warming.
                                              - We should be more concerned about the Intellectual Climate.
                                              -
                                              Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
                                              - Dr Seuss
                                              -
                                              You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                                              -

                                                Comment

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