Bill,
Since the XIT button (and the other buttons) works it is an indicator
that the pushbutton matrix decode is working in general - which could
point to the MENU pushbutton itself as the problem - remove the front
panel assembly and check the soldering to the MENU button carefully.
The only other thing I can think of that might be wrong is internal to
the MCU itself - not processing the input correctly.
You asked about troubleshooting with your DMM - unfortunately, these
signals are digital and the results consist of pulses at the appropriate
time, so drawing conclusions from DMM readings is very 'iffy'. One
thing you can check while you have the Front Panel assembly off is to
make a resistance reading between front panel U2 pin 6 and U3 pin 6 -
when you press the MENU button, the resistance should go to nearly
zero. If it does not, the pushbutton (or its soldering) is faulty.
73,
Don W3FPR
bill KE5KWE wrote:
Thank you Don and Dave for your replies. I tend to agree with you Don that
these are two seperate problems, but I don't know. In answer to your
question the XIT button does work as well as all other buttons. I did
forget to mention that the antenna tuner is a KAT2, which is installed.
My elmer did suggest that if the wire had become broken or possibly came
into contact with the side of the travel trailer (ie. metal) it could have
experienced RF feedback which would cause it to lock up and if it were
strong enough might have fried the menu. I don't know, nor do I know how to
test for this. I did disconnect the long wire and ground. Reconnected
another wire not in contact with anything and the both problems persisted.
Bill
Don Wilhelm wrote:
Bill, Check to see if the XIT button works and report back here. I
believe
you may have a bad solder connection on the front panel board.
73,
Don W3FPR
bill KE5KWE wrote:
My K2, s/n 6301, has been built and operating for several months.
However, I
recently relocated and just now was able to put up a long wire antenna.
It
is connected directly to my K2 with a KAF2 installed. I was able to tune
it
on all bands the radio operated fine for about an hour. Then I decided
to
retune a band and the antenna tuner went through its routine, ie. heard
all
clicks and watched display count down and it suddenly froze up. The only
way to reset was by turning radio off and then on, again. All appeared
normal but when I went to change something using the menu button, I
discovered that it no longer worked.
The menu would not come up. But the radio was receiving properly,
switched
bands properly, the vfo worked properly, switched antennas properly and
all
filters work properly. The radio is a QRP, CW only. Any ideas of what
to
look for? I will look for cold solder joints although that has been done
previously. Are there any tests that I can perform using only my
multimeter
and the radio itself? Should I contact Elecraft about their repair
service,
unit is under warranty?
Thanks for any help you can give. I am alone in Albuquerque, NM and my
Elmer is in Alabama. Should anyone on the Reflector be out here, I would
love the company.
73 de KE5KWE
Bill
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