I,m brand new to this forum. I need your help. While powering up a KS-24361 set of units for the first time, my power plug for P1 was wired incorrectly!. Pin one (P1) was plus 24 VDC; Pin three (P1) minus 24 VDC--this should have been pin two Tried same connection on both L101 and L102, no activity of any kind. Where does pin three (P1) connect. I may have trashed both units. Are schematics available. Thanks W8BUZ --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

Hi The power “brick” is a pretty standard Lucent part. The show up from time to time on the surplus market. The gotcha is that you may be able to buy a KS box for less than the asking price for the power brick. There are no schematics on these devices other than what some people have traced out here and there. The input to the power brick is simple enough that it’s probably worth simply tracing out on the board. That will involve pulling the board completely out of the chassis (which is a pain). Once it’s out, some quick ohm meter checks between the power inputs and the labeled pins on the power converter will give you a pretty good idea of what goes where. There *might* be a pc board mounted fuse on there somewhere …. Bob > On Feb 4, 2017, at 8:54 PM, Roland Wm Buzz Ude <buzz@baylorhill.com> wrote: > > I,m brand new to this forum. I need your help. While powering up a KS-24361 set of units for the first time, my power plug for P1 was wired incorrectly!. Pin one (P1) was plus 24 VDC; Pin three (P1) minus 24 VDC--this > should have been pin two Tried same connection on both L101 and L102, no activity of any kind. Where does pin three (P1) connect. I may have trashed both units. Are schematics available. Thanks W8BUZ > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

There's a surface-mount fuse on the back of the board. But pin 3 seems to show no leakage to other pins. I'd be surprised if connecting it has caused any damage. Have you tried reconnecting it correctly ? On Sun, Feb 5, 2017 at 3:53 PM, Bob Camp <kb8tq@n1k.org> wrote: > Hi > > The power “brick” is a pretty standard Lucent part. The show up from time > to time > on the surplus market. The gotcha is that you may be able to buy a KS box > for less > than the asking price for the power brick. > > There are no schematics on these devices other than what some people have > traced > out here and there. The input to the power brick is simple enough that > it’s probably > worth simply tracing out on the board. That will involve pulling the board > completely > out of the chassis (which is a pain). Once it’s out, some quick ohm meter > checks between > the power inputs and the labeled pins on the power converter will give you > a pretty > good idea of what goes where. There *might* be a pc board mounted fuse on > there > somewhere …. > > Bob > > > On Feb 4, 2017, at 8:54 PM, Roland Wm Buzz Ude <buzz@baylorhill.com> > wrote: > > > > I,m brand new to this forum. I need your help. While powering up a > KS-24361 set of units for the first time, my power plug for P1 was wired > incorrectly!. Pin one (P1) was plus 24 VDC; Pin three (P1) minus 24 > VDC--this > > should have been pin two Tried same connection on both L101 and L102, no > activity of any kind. Where does pin three (P1) connect. I may have trashed > both units. Are schematics available. Thanks W8BUZ > > > > --- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. >

See https://www.febo.com/pipermail/time-nuts/2014-October/087670.html Pin 1 is Plus, pin 2 is Minus to an isolated power supply. All other pins have no connection. Hence, no damage. Schematics are not available, but many people have discovered what it takes to make them work. Time nuts is an adventure, but it's best to check the pipermail/time-nuts archive for previous work. Good fortune on your quest for knowledge. Bill Hawkins

  From: Bob Camp <kb8tq@n1k.org>

To add in some small manner to what Bob Camp said: IIRC, the input is polarity protected by a diode or two.  I think the input to the brick is floated; i.e. neither of the two power leads is connected to ground.  The brick can be disassembled, if you're careful.  The components, except for the transformers are pretty standard stuff.  On one of my units, I had a blown cap and diode.  It is SMT, though, so you'd need expertise in working with that. I find it hard to believe that the brick was blown, though.  Have you verified that you're powering the correct pins? Bob From: Bob Camp <kb8tq@n1k.org> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Sunday, February 5, 2017 9:53 AM Subject: Re: [time-nuts] Power Problems Lucent KS-24361, L101 & L102 Hi The power “brick” is a pretty standard Lucent part. The show up from time to time on the surplus market. The gotcha is that you may be able to buy a KS box for less than the asking price for the power brick. There are no schematics on these devices other than what some people have traced out here and there. The input to the power brick is simple enough that it’s probably worth simply tracing out on the board. That will involve pulling the board completely out of the chassis (which is a pain). Once it’s out, some quick ohm meter checks between the power inputs and the labeled pins on the power converter will give you a pretty good idea of what goes where. There *might* be a pc board mounted fuse on there somewhere …. Bob > On Feb 4, 2017, at 8:54 PM, Roland Wm Buzz Ude <buzz@baylorhill.com> wrote: > > I,m brand new to this forum. I need your help. While powering up a KS-24361 set of units for the first time, my power plug for P1 was wired incorrectly!. Pin one (P1) was plus 24 VDC; Pin three (P1) minus 24 VDC--this > should have been pin two Tried same connection on both L101 and L102, no activity of any kind. Where does pin three (P1) connect. I may have trashed both units. Are schematics available. Thanks W8BUZ > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.