I had the same thing happen on 1ks24361 Makes a nasty smell On Sunday, January 31, 2016, Adrian Godwin <[email protected]> wrote:
> A tant melted on one of my KS-246361 boxes (I guess they're a similar age, > possibly even the same source). The only one so far to have trouble. It > failed in such a way that it continued to smoke and load up the power > supply, > > The current drawn from the no-name laptop power supply was still well > within spec, at least by the time I post-mortem'ed it. But that melted too, > and took out three levels of circuit breakers. The KS-24361 worked > perfectly after replacing the cap. > > > > > On Sun, Jan 31, 2016 at 4:42 PM, Bob Camp <[email protected] <javascript:;>> > wrote: > > > Hi > > > > I had one that took out the internal fuse once every 3 to 5 years. After > > replacing the fuse 3 times, the supply died. Go figure … only 15 years or > > use. > > > > Bob > > > On Jan 31, 2016, at 9:11 AM, paul swed <[email protected] > <javascript:;>> wrote: > > > > > > As I mentioned in the another thread this week. > > > You can indeed replace the failed voltage with just another inverter. > > > Mine has run this way for 10 years. Mine was a 5 by the way. If it was > > one > > > side of the +/-15 I would say you want to replace both. > > > The entire switcher can be replaced with supplies that work off of 110 > so > > > you can get rid of the 48 volt supplies. > > > Good luck > > > Paul > > > WB8TSL > > > > > > On Sun, Jan 31, 2016 at 12:04 AM, Alex Pummer <[email protected] > <javascript:;>> wrote: > > > > > >> power supply runs for a while, output current increases, but voltage > > stays > > >> correct -> problem is in the load circuit, load circuit working for a > > while > > >> load current increases, but it recovers after pause -> look for some > > >> tantalum capacitor in the load circuit, they recover often a few > times > > >> before they finally die, > > >> KJ6UHN > > >> Alex > > >> > > >> On 1/30/2016 6:21 PM, Artek Manuals wrote: > > >> > > >>> My Z3801A began to die over the last few days. It would work for an > > hour > > >>> or two then produce a receiver error and communications problems. > Turn > > it > > >>> off, let it sit awhile, back on and it would start the survey and > then > > >>> begin to recover. Tonight it finally went dead with high current on > the > > >>> main input . The feed supply has a 2amp current limit so I have not > > blown > > >>> the two 3amp fuses > > >>> > > >>> I have a schematic of the supply reverse engineered by Stefan > > Hegnauere a > > >>> few years ago (thank you very much) and a limited theory of operation > > >>> description so I am not totally dead from a troubleshooting point of > > view > > >>> although if one of the DC-DC converters is dead then I will likely > > have to > > >>> scrap the supply > > >>> > > >>> Questions > > >>> 1) Any prior experience as where to look first I checked the > > >>> electrolytics and at first glance they seem fine, no loss of magic > > smoke or > > >>> any parts obviously hot or bulging. ESR 's look good on those > > >>> 2) Will this supply function unloaded while I troubleshoot it on the > > >>> bench out of the unit? > > >>> 3) Anyone tried independent powering the Z3801? looks like two 5V > > >>> supplies and +/- 15V..not hard to to do > > >>> 4) Anyone with a good supply from a parts unit want to part with > same? > > >>> > > >>> Dave > > >>> NR1DX > > >>> ArtekManuals.com > > >>> > > >>> > > >> _______________________________________________ > > >> time-nuts mailing list -- [email protected] <javascript:;> > > >> To unsubscribe, go to > > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > >> and follow the instructions there. > > >> > > > _______________________________________________ > > > time-nuts mailing list -- [email protected] <javascript:;> > > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > and follow the instructions there. > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] <javascript:;> > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] <javascript:;> > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
