Thanks Don. I had the same thought about U1, but unfortunately the symptoms remain after re-seating it a couple of times.
Regarding AUXBUS, I believe continuity is good, since a logic probe on the KAT100 side shows activity when certain K2 controls are manipulated such as Power, Tune, and Band. It is "high" at all other times. I checked this all the way to pin 40 of U1. Should I conclude that the next step would be to replace U1? On Sat, Jan 4, 2020 at 9:54 AM Don Wilhelm <donw...@embarqmail.com> wrote: > > Johnathan, > > Since the KAT100 is not recognized in the K2 menu, you either have a > problem with the KAT100 firmware, but do check the cable for continuity > of the AUXBUS signal that is used to communicate among the various > pieces of firmware ICs throughout the K2 system. > > Since the KAT100 has not been in service for a while, it may be that > there is oxidation on the KAT100 firmware IC pins. Removing and > reinserting the firmware IC may bring it back to life by wiping away any > oxidation on the pins. > > As for the LEDs, that is also controlled by the firmware IC, so fix the > firmware problem first, and then you can find any problems that remain. > > 73, > Don W3FPR > > On 1/3/2020 11:13 PM, Jonathan Taylor, K1RFD wrote: > > I am testing my KAT100, which had been sitting idle for a number of > > years. It is connected to the K2/100 via the DB9 cable as described > > in the KAT100 manual. The two are interconnected with a coax cable > > and Ant1 is connected to a dummy load. > > > > 1. Apply power to KAT100. > > 2. Turn on K2/100. > > 3. Almost immediately, all LEDs on the SWR bar graph illuminate, the > > S-meter bar graph on the K2 goes full scale, and both remain in this > > state. The receiver is silent. (There is no indication of any output > > power, as if it were transmitting.) > > > > Pressing the ANT1-2 button on the K2 produces the "not inst" message. > > Turning off the K2 power, all LEDs on the KAT100 remain illuminated. > > With KAT100 powered off, K2 functions normally. > > > > I have verified the wiring of the DB-9 cable. What's the next best > > thing to check? > > > > Thanks > > ______________________________________________________________ > > 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 donw...@embarqmail.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
