K2 - keypad problem
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Hi All, Im new to the group, I have a K1 #744 and just finished installing the KAT1 - Works great, what a rig !
So this is what I have.... I bought a K2 #4436 that was started by a ham who did not have the time to finish it. He managed to get to page 39 of assembly. When I bought the kit, I was not sure where he exactly left off, and so on,,,, So I went thru several procedures spending a couple hours checking his work, going through the resistance check sheet charts. All looked good. All three charts checked out to be fine. His work looked good. I continued building the kit and now I am stuck ! I made it to page 42. Yes, a whopping 3 pages ! ;) Problem. Once the kit is turned on, 'Elecraft' shows up on the screen, then ' 204p 109 ' shows up for a brief second, the rig then displays the 7.100. I then press the display button - nothing, I try all the other front panel buttons, nothing. The main tuning dial does work and the display is fine. I went to the trouble shooting portion of the manual. I checked the voltage on MCU - the 5v that is required at pin 32 is 4.97. Thats fine. I listened for the 4 Mhz oscillator - its there, loud and clear. The rig does not display any INFO numbers - No smoke, Relays click in fine. Initial processor set up went fine too. Any thoughts or suggestions would be appreciated. 73 Mike _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Mike,
You have a pushbutton that is 'stuck' for one reason or another. It may be a mechanical problem or it could be electrical. I am making that judgment because the display you report is exactly what is supposed to happen if you hold a pushbutton down while powering the K2 on - the fact that the pushbutton continues to be held down (either physically or electrically) results in the inability to do anything else. You can find out which switch in the pushbutton matrix is causing a problem using an ohmmeter. Check from front panel U3 pin 6 to each of U2 pins 3, 4, 5, 6, 11, 12, 13, and 14. If you find no path with low resistance, the problem switch is not in the Bank1 set, so check Bank 2 - check continuity from U3 pin 16 to the same pins on U2. If you find no pushbutton that is closed, check the soldering at RP1 carefully - these resistors act as pullups, and a missing pullup resistor in the circuit can act just like a closed pushbutton. As a double check, measure the resistance from each of the U2 pins mentioned above to the 5A voltage rail (U2 pin 16 is one location) - you should measure 100k ohms in all cases. 73, Don W3FPR Michael - VE3MKX wrote: > Hi All, Im new to the group, I have a K1 #744 and just finished installing the KAT1 - Works great, what a rig ! > > So this is what I have.... > > I bought a K2 #4436 that was started by a ham who did not have the time to finish it. > > He managed to get to page 39 of assembly. When I bought the kit, I was not sure where he exactly left off, and so on,,,, So I went thru several procedures spending a couple hours checking his work, going through the resistance check sheet charts. All looked good. All three charts checked out to be fine. His work looked good. > > I continued building the kit and now I am stuck ! I made it to page 42. Yes, a whopping 3 pages ! ;) > > Problem. Once the kit is turned on, 'Elecraft' shows up on the screen, then ' 204p 109 ' shows up for a brief second, the rig then displays the 7.100. I then press the display button - nothing, I try all the other front panel buttons, nothing. The main tuning dial does work and the display is fine. > > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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K2 #3766, a kit that I bought a few years ago and let sit on the shelf
for a while. I'm finally threatening to finish it. All has gone well up to the VFO Linearization step in Alignment where the CAL PLL menu item is supposed to be run. I've followed the instructions to the letter, but when I go through the menu, select CAL PLL and hold the "EDIT" key to start the linearization sequence.... nothing. The 12099 kHz frequency is displayed, but does not change. There are no "d"s displayed to indicate stored data points. Nothing happens. Any ideas? MCM firmware is 2.03. IOC firmware is 1.07 Bob K4ERR _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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