Re: [Elecraft] K3S - blank screen - won't start won't shut off
Our club's K3 has had a similar problem for several months. It only occurs when you physically turn the K3 power off from the from the front panel. The display stays lit, but remains blank. Pressing the power button has no effect until I turn off the 13.8V supply, and turning it back on. When the K3 is turned on using the front panel button, the display works OK until the next time we turn off the power using the front panel.Our club K3 is set up as a remote station using the RemoteHams.com software. The K3 powers on and off just fine when done from the remote client software.It seems like a 5V regulator problem would affect the display all the time, not just when the front panel power button is pressed.Thanks & 73,EdN2BHD __ 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
Re: [Elecraft] K3S - blank screen - won't start won't shut off
Keith _always_ gives good advice. I would add one thing. Make sure the AUXIO cable is disconnected from the back of the K3 when you do your testing. If it is directly connected to a KPA500 or KPA1500, it just may keep the K3 from shutting down. We don’t remember if the LCD will go blank in this situation, though. This is why we specify AUXIO cables for the KPAs with pin 8 (the power-on pin) disconnected. 73, Jack, W6FB > On Oct 14, 2021, at 7:40 AM, Jim Sheldon wrote: > > Turned on my K3s this morning and got a blank screen. Could not turn it off > after that without removing power. Haven't opened it up yet, just wondering > if anyone has encountered this and can suggest a good place to start > troubleshooting before bothering Elecraft's Tech Support with it. > > Jim Sheldon, W0EB > > __ > 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 jackbrin...@me.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
Re: [Elecraft] K3S - blank screen - won't start won't shut off W0EB
Hi Jim; First, do NOT try loading FW, don't do a Parameter-Reset (EE-INIT) when it is in this state. 1. Check the right side of the radio, it should be warm not hot. If hot, then the 5 or 8 volt regulator is working too hard, either a short or itself is bad. 2. More likely, C102 on the FP (Front Panel) is shorting the 5Volts for the Contrast. One end of C102 should have close to 5V. You can reach this by just taking the top cover off! It is on the rear side of the FP board at the top, directly behind the top left corner of the LCD. It is our part# E530223. 10 uF,10V,20%,CERM,0805,SMD. Panasonic ECJ-2FF1A106Z. Digikey PCC2233TR-ND. Keith WE6R Elecraft K3/K4 Tech. __ 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
[Elecraft] K3S - blank screen - won't start won't shut off
Turned on my K3s this morning and got a blank screen. Could not turn it off after that without removing power. Haven't opened it up yet, just wondering if anyone has encountered this and can suggest a good place to start troubleshooting before bothering Elecraft's Tech Support with it. Jim Sheldon, W0EB __ 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
