Tom,
RF Board U1 should not get hot. Make sure it is oriented correctly.
The notch goes toward the left side panel.
If you plugged it in backwards, cross your fingers that it is still OK.
Error 080 is an indication that the main microprocessor cannot
communicate with other microprocessors in the system over the single
line AUXBUS signal. In the bare K2 there are 2 microprocessors -
Control Board U6 is the main one and RF board U1 is the other.
For the LO BATT message, make certain you have the jumper on the 3 pin
header at the top of the Control Board plugged for INT (to the left as
you look down on it).
As for the garbled display, first get rid of the INFO 080 messages, and
then tackle that one. Peer under the LCD display to see if pin 1 of
Front Panel U1 was soldered. If it was not, cut away a bit of the lower
part on socket corner to expose the pin and solder it from the top.
With all those problems, I am wondering about the quality of your
soldering. Compare your solder connections with the diagrams in the
soldering tutorial that you can download from the Elecraft website. You
need enough heat on both the component leads and the solder pads to make
the solder flow out to an almost invisible edge. Any solder fillet
should be concave. If it is convex, either too much solder was applied
or the solder did not flow adequately into the thru-plated hole.
73,
Don W3FPR
On 3/2/2013 1:15 AM, Tom Fuller wrote:
Hello, I am assembling my Elecraft K2 Radio (serial # 7421) , I made it up to
page 43 of the manual, earlier today I was able to get the info 201 to show
on display as on page 43 and frequencies showed ok/bands changed on display
ok also but with info 080 message shown , the tuning dial did not seem to be
working too well...In order to troubleshoot it, I began to re-solder all the
connections but now the frequencies don't display anymore-just some garbled
numbers show and also I am still getting an error 080 message/low battery
message and I noticed the part U1 on the RF board is hot to touch. I have
gone thru the troubleshooting steps but don't want to go past page 44 steps
because I want to get the frequency display to work again and removed the
info 080 message before I move on... does anyone have any additional
troubleshooting steps?
thanks and 73,
KE4QCM
Tom Fuller
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