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.
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