- Power supply (capacitor) works after months - 3 Updates
| vjp2.at@at.BioStrategist.dot.dot.com: Dec 06 06:28PM Thanks to all. I let it run 24hrs, then shut it off for a few min and turned it back on, seems fine. The lesson for the last time seemed to avoid prolonged non use. Aside: A few years a had a supercapacitor watch. Spozably charged by moving. I loved it. Then I got sick for over a week and the watch got uncharged and never worked again. Bummer. - = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus blog: panix.com/~vjp2/ruminatn.htm - = - web: panix.com/~vjp2/vasos.htm facebook.com/vasjpan2 - linkedin.com/in/vasjpan02 - biostrategist.com ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- |
| Jeff Urban <jurb6006@gmail.com>: Dec 06 11:05AM -0800 There is usually a cap in the startup circuit that can cause that. It will be on the hot side. Sometimes you got a resistor to the raw B+ which hits a source from a tertiary winding that powers the drive circuitry. Caps on the secondary side don't generally cause that, and even if they get slightly weak there are more caps on the mobo to take up the slack. If they get really bad and the ones on the board are not enough you might get erratic operation and maybe even data corruption. Even when it is not that bad those caps being bad can cause it to be more susceptible to momentary power glitches one of which just destroyed the OS in one of my boxes. I'm going to reload it one of these days but haven't gotten around to it. Lazy, and when I get unlazy I got work to do. In that one if the caps were in better shape they would have held a charge long enough, there were three outs of duration in milliseconds. It shouldn't have affected anything. |
| John-Del <ohger1s@gmail.com>: Dec 07 04:42AM -0800 > Thanks to all. > I let it run 24hrs, then shut it off for a few min and turned it back on, > seems fine. Be aware that that is exactly the symptom you get with an older, dying electrolytic. Shutting off a few minutes will not be long enough for the warmed up capacitor to cool it's core, particularly if it's a brick supply that isn't generally well ventilated. I'm not saying a lazy cap is your problem, but it's a high probability from your description of symptoms. |
| You received this digest because you're subscribed to updates for this group. You can change your settings on the group membership page. To unsubscribe from this group and stop receiving emails from it send an email to sci.electronics.repair+unsubscribe@googlegroups.com. |
No Response to "Digest for sci.electronics.repair@googlegroups.com - 3 updates in 1 topic"
Post a Comment