I am having what appears to be the same problem. In my case it was fine, but was reading "brown-out" due to low voltage whenever I would transmit. Turned out I had a bad power cable for the radio. That is now fixed, but the P3 will no longer power up. I do not see anything that looks like a fuse in the system.
Any other suggestions? Thanks and 73, -Corky, AF4PM On Mon, Aug 5, 2024, at 6:42 AM, Tom wrote: > Hi > My P3 has all of a sudden stopped powering on. I am not sure what the issue > is and I am asking here to see if I can determine where the issue is. > I have done the usual steps of verifying the power supply, holding down the > power button for more than 10 seconds with no resolution. > > Using my bench power supply, I see that there is 0 ma current draw at the > start. Pressing the power switch will increase the current draw to around > 260ma as long as the switch is held down. > > The test points on the I/O board (and power supply) show 12V, 5.0 V and > instead of 3.3V shows 2.6V. > > > That is about the extent of my capabilities to trouble shoot from the > schematic. > > I am wondering if this is just the power supply / IO board? It would seem > that Elecraft still has these in stock. > > Thanks, Tom > Va2fsq.com > > > -- > This email has been checked for viruses by Avast antivirus software. > www.avast.com > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to af...@searlsnet.com > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
