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  • CB 3 BREAKER

    Popping cb3 breaker on chassis nonstop on lane 17. Spent the night tracing the circuit. Got continuity from c2a plugs all the way back to back end control panel sweep switch and back. Low voltage fault somewhere, cooking breaker maybe with 110v. Suggestions? Tried several diff chassis. Tried different table and sweep switches. Blew out wireway. Checked machine side pins. Lost at the moment.
    The impossible often has a kind of integrity to it which the merely improbable lacks.

  • #2
    Re: CB 3 BREAKER

    Had the same problem once. It was a combination of a small nut in the channel under the chassis that made contact with two sockets, and a wire that had a piece of isolotion riped off, just at the junction of two parts of the channel to the back end control box.

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    • #3
      Re: CB 3 BREAKER

      Since you have determined this to be in the pinsetter, does this lane have AccuScore+? If it does, there's a white lead in the 7035 cable that piggy-backs into J10 which picks up 24V from the Sweep/Table toggle switch in the BE control box; of course the S&T switches get it's power from the T1 secondary side that is protected by CB-3.
      Does the CB pop with the S&T switches in the OFF position?
      Does the CB pop when the white lead of the 7035 cable is removed from the S&T switch power source?

      If it only pops when the 7035 cable is attached, I'd check for a smashed cable which could be shorting the 24V.
      "Where are we going, and why are we in a hand basket?"

      --Kat

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      • #4
        Re: CB 3 BREAKER

        Kat's test with the swicthes off is a good idea.

        With the sweep and table switches off, and the machine off with C plugs out, check for ground on C2A-11. It should not be grounded. Now turn on sweep and table switches one by one to detect short to ground in those circuits.

        Another possibility is the BE relay circuit, which also runs off the same circuit in most chassis (some chassis have it in the M circuit). So try the test above also with the pit switch off and then on, except using C2A-313.

        Cheers,
        Andrew.

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        • #5
          Re: CB 3 BREAKER

          All excellent advice, providing you know the problem is on the machine side. The only thing I can add is that if you have an automatic OOR device getting its power from the table or sweep switch, this too could cause your problem if the device is shorted to ground.

          If such a device is present, you might want to disconnect it from the switch it’s getting its power from.

          Triac

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          • #6
            Re: CB 3 BREAKER

            Kat, you're right! I found the problem last night and it ended up being, i suppose, the magic score equivalent of the '7035' cable; one red wire on table switch that i traced to this old box with 2 relays in it. luckily we have steltronic now and i just pulled those wires off and taped em up. problem solved. Thanks everyone for the help!

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            • #7
              Re: CB 3 BREAKER

              Danny

              Give that man a raise. He's doing his work & yours too!! [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img] [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img]
              Even a old dog can bury a bone

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              • #8
                Re: CB 3 BREAKER

                Way to go, Kat! Nice catch.

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                • #9
                  Re: CB 3 BREAKER

                  Glad it worked, thanks for letting us know.
                  "Where are we going, and why are we in a hand basket?"

                  --Kat

                  Comment


                  • #10
                    Re: CB 3 BREAKER

                    Originally posted by old-school-mechanic:
                    Danny

                    Give that man a raise. He's doing his work & yours too!! [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img] [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img]
                    <font size="2" face="Verdana, Helvetica, sans-serif">He has been doing it for years. He is my Will Riker. (minus any sexual overtones or weird beard- trimming rituals)
                    The impossible often has a kind of integrity to it which the merely improbable lacks.

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                    • #11
                      Re: CB 3 BREAKER

                      nor the goofy spandex suit.

                      Comment


                      • #12
                        Re: CB 3 BREAKER

                        Hold your tongue, scoundrel! The starfleet uniform is smashing and you know it. As penance for your mockery of such fine garb, you are required to outfit yourself in a starfleet uniform for work on monday.


                        Don't forget the little chest communicators. And phasers. Bring those too.
                        The impossible often has a kind of integrity to it which the merely improbable lacks.

                        Comment


                        • #13
                          Re: CB 3 BREAKER

                          Are you kidding? Those outfits are so tight you can tell what religion they are! It always wierded me out right from the start.

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                          • #14
                            Re: CB 3 BREAKER

                            Even on the lovely and talented Deanna Troi? Bethink you. Half-Betazoid cleavage was born to nestle in starfleet uniforms.

                            But i hear you. Worf and his package need not be encased in those spandex-like pantaloons.
                            The impossible often has a kind of integrity to it which the merely improbable lacks.

                            Comment

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