2Wire psu BT 2700HGV router

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  • Sylvester
    Senior Member
    • Nov 2006
    • 67
    • UK

    #1

    2Wire psu BT 2700HGV router

    Router is a rebadged 2wire, no lights on hub, psu has faint squealing from it when plugged into router, DMM shows 5.1v but no idea what happens when plugged into router.

    Opened psu case and saw 3 bulging 1000v 16v rifeking caps, so decided to change them but ran into a problem, I had 20mm x 8mm caps but they are too tall by a few mm and the pins wouldn't go through the small pcb holes 1.2mm?

    So I'll need to find some caps that'll fit, anyone had these psu's fail?[/URL][/IMG]

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  • PeteS in CA
    Badcaps Legend
    • Aug 2005
    • 3578
    • USA, Unsure of Planet

    #2
    Re: 2Wire psu BT 2700HGV router

    Actually, what's difficult with that part is the 8mm diameter. With Nichicon, the only low impedance series that has a 1000uF, 16V part in 8mm x 20mm is the new HW series. That looks like a good series, but it is new and availability may not be good. IF you can make 10mm x 20mm fit, you've got lots of options with Nichicon - the HE, HV, PA and PW series, and possibly the HD series, have 1000uF, 16V part in a 10mm x 20mm case.
    PeteS in CA

    Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
    ****************************
    To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
    ****************************

    Comment

    • Sylvester
      Senior Member
      • Nov 2006
      • 67
      • UK

      #3
      Re: 2Wire psu BT 2700HGV router

      I've got panasonic FR series 8x20mm but as you'll see from the photo they are taller than the originals, not a lot of space for them, as mentioned, I'll need to widen the holes for the panasonics to fit. So far haven't found a 18mm or so tall 8mm cap.

      [/URL][/IMG]

      Comment

      • Th3_uN1Qu3
        Believe in
        • Jul 2010
        • 6031
        • Romania

        #4
        Re: 2Wire psu BT 2700HGV router

        You can use 10v and even 6.3v caps in that since it's a 5v supply. This should open up more options.
        Originally posted by PeteS in CA
        Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
        A working TV? How boring!

        Comment

        • Sylvester
          Senior Member
          • Nov 2006
          • 67
          • UK

          #5
          Re: 2Wire psu BT 2700HGV router

          I can't believe someone has over specced the caps on this psu, or is it the originals were so far out of spec!
          Last edited by Sylvester; 11-12-2013, 07:30 PM.

          Comment

          • Th3_uN1Qu3
            Believe in
            • Jul 2010
            • 6031
            • Romania

            #6
            Re: 2Wire psu BT 2700HGV router

            They likely just had a few thousand of them lying around and thought they'd put them to some use. This kind of thing is common in routers and switches, i see 16v caps often on rails that run at 3.3v or lower... and yes i see them failed.

            Some people say that higher voltage caps last longer in a given application, sure, if they're good quality to begin with. Higher voltage crap caps are still gonna fail because they're just a different kind of crap.
            Last edited by Th3_uN1Qu3; 11-13-2013, 03:57 PM.
            Originally posted by PeteS in CA
            Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
            A working TV? How boring!

            Comment

            • Sylvester
              Senior Member
              • Nov 2006
              • 67
              • UK

              #7
              Re: 2Wire psu BT 2700HGV router

              I've got some 1000uF 10v panasonic FM's which should arrive tomorrow, 16mm tall

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: 2Wire psu BT 2700HGV router

                I fixed a lot of these, some use 1000uf 10V, some use 1000uf 16V. I use 10V PANASONIC FM series.
                http://s807.photobucket.com/user/bud...?sort=3&page=1
                Never stop learning
                Basic LCD TV and Monitor troubleshooting guides.
                http://www.badcaps.net/forum/showthr...956#post305956

                Voltage Regulator (LDO) testing:
                http://www.badcaps.net/forum/showthr...999#post300999

                Inverter testing using old CFL:
                http://www.badcaps.net/forum/showthr...er+testing+cfl

                Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                http://s807.photobucket.com/user/budm/library/

                TV Factory reset codes listing:
                http://www.badcaps.net/forum/showthread.php?t=24809

                Comment

                • jetadm123
                  Badcaps Legend
                  • Feb 2010
                  • 2169

                  #9
                  Re: 2Wire psu BT 2700HGV router

                  Actually, in your first post, last photo, the heatsink on the right appears to be taller than the original caps. If the new FR's are the same height as the heatsink you might be alright. Dry fit a new cap and see if the plastic cover clears it.

                  Comment

                  • Sylvester
                    Senior Member
                    • Nov 2006
                    • 67
                    • UK

                    #10
                    Re: 2Wire psu BT 2700HGV router

                    I'll have another look at the FR's but think they stick a little above the heatsink, failing that its the FM's.

                    Comment

                    • LLLlllou
                      Badcaps Veteran
                      • May 2011
                      • 201
                      • USA

                      #11
                      Re: 2Wire psu BT 2700HGV router

                      Originally posted by Sylvester
                      I'll have another look at the FR's but think they stick a little above the heatsink, failing that its the FM's.
                      Either will be more than adequate and should last a couple decades, at least.

                      Comment

                      • kc8adu
                        Super Moderator
                        • Nov 2003
                        • 8832
                        • U.S.A!

                        #12
                        Re: 2Wire psu BT 2700HGV router

                        last one i fixed i used 1000@6.3 mbz as thats what i had in my road kit.
                        this dsl modem will be in the recycle bin before those give up.

                        Comment

                        • Sylvester
                          Senior Member
                          • Nov 2006
                          • 67
                          • UK

                          #13
                          Re: 2Wire psu BT 2700HGV router

                          Update on this,

                          finally fitted 1000uF 10v FR's, psu is now working, router is now alive. The 16v sat just above the heatsink and would be in contact with the case.

                          What do you guys stick the case back together with, I thought some solvent glue would stick them together but it doesn't melt the plastic?

                          Comment

                          • Th3_uN1Qu3
                            Believe in
                            • Jul 2010
                            • 6031
                            • Romania

                            #14
                            Re: 2Wire psu BT 2700HGV router

                            I always use superglue/loctite.
                            Originally posted by PeteS in CA
                            Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                            A working TV? How boring!

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #15
                              Re: 2Wire psu BT 2700HGV router

                              I use PVC pipe glue, super glue gel works well too.
                              Never stop learning
                              Basic LCD TV and Monitor troubleshooting guides.
                              http://www.badcaps.net/forum/showthr...956#post305956

                              Voltage Regulator (LDO) testing:
                              http://www.badcaps.net/forum/showthr...999#post300999

                              Inverter testing using old CFL:
                              http://www.badcaps.net/forum/showthr...er+testing+cfl

                              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                              http://s807.photobucket.com/user/budm/library/

                              TV Factory reset codes listing:
                              http://www.badcaps.net/forum/showthread.php?t=24809

                              Comment

                              • Sylvester
                                Senior Member
                                • Nov 2006
                                • 67
                                • UK

                                #16
                                Re: 2Wire psu BT 2700HGV router

                                PVC/solvent glue doesn't work on this cover, I'll try superglue, plastic can be a problem.

                                Comment

                                • SeanB
                                  Member
                                  • Jun 2013
                                  • 41
                                  • South Africa

                                  #17
                                  Re: 2Wire psu BT 2700HGV router

                                  I have been using for the last few cases a Pratley product called Wonder bond, a flexible 2 part epoxy. 2 part rsin and hardener available in white and black, which adheres well to almost any plastic after you degrease it with a solvent, and fills gaps well. Use a small spatula ( cut a piece of plastic card to mix and apply it with) to mix it and apply it. Small beads from the tubes and hold the case together with a clamp or some PVC tape while it cures for 24 hours and you have a like new join. Can be opened for rework but does well in filling gaps and such.

                                  Comment

                                  • Sylvester
                                    Senior Member
                                    • Nov 2006
                                    • 67
                                    • UK

                                    #18
                                    Re: 2Wire psu BT 2700HGV router

                                    I've used a 2 part loctite epoxy before to repair difficult plastic, grey when mixed, just find it messy to use, also tried another loctite product which was an activator brushed onto plastic before using superglue but it didn't seem to be any better than using superglue on its own
                                    Last edited by Sylvester; 12-01-2013, 06:44 PM.

                                    Comment

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