[Elecraft] K2 Locked up after 160m module install

[Don Wilhelm]

Guy,

Your other choice is to find out what is causing the 'lock up'. It is 
quite likely that it has nothing to do with the K160XV installation, but 
is related to something you inadvertently touched or bumped during the 
install process.

Take a more thorough look at what works and what does not. Remove and 
re-seat the control board. Measure the 8R and 8T voltage rails - you can 
easily check at the anodes of RF Board D6 and D7. During receive, D6 
will have about 8 volts on its anode and D7's anode should be near zero. 
If that relationship is reversed, your K2 is stuck in transmit (no 
buttons will work during transmit).
You can try removing and reseating control board U6.

If you do a Master Reset, I hope you have recorded all your menu and 
filter settings because all your settings will be 'restored to defaults' 
and you will have to set everything up again. Check other things, and do 
the Master Reset only as a last resort unless you have all the data 
needed to set it up again.

73,
Don W3FPR

hamblen9 at optonline.net wrote:
> GM,
>
> I built up and installed the 160m module. Powered on the K2 and it locked up. No error messages on power on but no buttons will have any effect. VFO works but that's all.
>
> Removed 160m and began troubleshooting. The only observable issue: Resistance between pin 1 and pin 10 on the 160m module is open. Still troubleshooting this simple module circuit.
>
> Meanwhile I reinstalled the W1 jumper and repowered the K2….it's still locked up. I've read Don Wilhelms injunctions against "not doing a MCU reset" but what are my other choices?
>
> Thanks, Guy
>   
>