And to confirm that replacing U4 78L06 got the KAF2 working again. A mystery why it failed though...
73 Dave G3YMC On 8 Dec 2014 at 10:56, Dave Sergeant wrote: > Further investigation shows the output of U4 78L06 regulator to be down > to 1V. So it appears the 78L06 has failed and once I have found one I > will change it. > > Thanks for the help. > > 73 Dave G3YMC > > On 6 Dec 2014 at 15:57, Dave Sergeant wrote: > > > My KAF2 has been working fine in my K2 for some years, not that I > > actually use it that much. Today I came into the shack to find no > > audio coming out of the K2 and when I tried to change the AFIL > > settings it said 'not installed'. I cannot change the RTC menu > > settings either. > > > > I have moved S1 on the KAF2 to bypass it and all is working fine so it > > seems there is a fault on the KAF2. The manual suggests this is a > > fault with the microcontroller, which of course it may well be, but > > are there any other known causes? I did think of the backup battery > > but not sure if this would cause issues outside the RTC, it measures > > just over 3V so a bit down. > > > http://davesergeant.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
