I think I need some help. After having a K2 (SN 6280) sitting unmade for 5 years, I finally got started on it and have reached the Alignment and Test, Part 1 stage. When powered up, I get "Elecraft" and then the frequency display. However, using band+ and band- I can only see 10, 12, 15 meters - 17m tunes but not to the proper freq. 20-80m all just say 15151. for freq. although the number of significant digits can be changed with the tuning Rate pushbutton and the mode change works. the menu button works, as does A, B, rit xit, display of voltage and current is normal. relays click with band changes even when moving through the lower bands when they just display the 15151 reading. All resistance checks for front panel and control boards are normal. Regulated 8 and 5 volts are correct. The 4 mhz oscilator is running. The voltages on the IOC on the rf board are normal. Each time I press band+ (or band-), pin 28 of the IOC dips from the nominal 5v as it should. One other thing: the pre/att switch does not trigger the associated relays and there is no signal on pin 28 of the IOC. (This may be unrelated to the band problem) Voltage checks of the MCU are normal with the exception of: pin 18 is 5v instead of 0v, pin 25 is 5v instead of 0v, pin 33 is 0v instead of 5v. However this may be perfectly normal as the rf board is only minimally built and the table is for a fully built unit. Needless to say, I have checked carefully on the three boards for bad joints, unsoldered joints, or bridged joints, although it is certainly possible i have missed something.
At this point I know AUX bus signals are going to the IOC (or at least the voltage is fluctuating when the panel buttons are pressed) so I am left wondering if either 1) the IOC is not working correctly, or 2) the MCU is not sending the proper signals. Or -- some other explanation? Any help someone could provide would be greatly appreciated. Ed Kleckner Hansville, WA [email protected] ______________________________________________________________ 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
