[Elecraft] R: R: R: K2 menu issue

[IZ0DIO]

Don,
again thank you for your suggestions and information. 
I'll look for a new EEPROM and then I'll follow your recommendations (I know the procedure to unsolder an IC, but to be honest I'm not enthusiastic to use it).
Ciao
Giorgio - IZ0DIO & KW4NE

-----Messaggio originale-----
Da: Don Wilhelm [mailto:donwilh at embarqmail.com] 
Inviato: domenica 17 settembre 2017 18:36
A: IZ0DIO <iz0dio at yahoo.it>; elecraft at mailman.qth.net
Oggetto: Re: R: [Elecraft] R: K2 menu issue

Georgio,

The last menu selection does not survive a power cycle.  It is "sticky" 
until power off/on.
ST L is the default selection upon initially entering the menu.

Yes, you might have a bad address in the EEPROM.  Since you have to copy the menu settings anyway, try doing a Master Reset (hold the 3, 4, and 5 buttons while powering on.
If that does not fix it, replace CB U7.

Once you have a replacement IC, cut the leads close to the IC body and remove the pins one at a time.
Clean up with solder wick and if solder remains in the holes, heat the solder pad and push it out with a wooden toothpick or a stainless steel needle.

73,
Don W3FPR

On 9/17/2017 12:16 PM, IZ0DIO wrote:
> Hello Don,
> thank you for your suggestion, but before desoldering U7 (not easy) and changing it I'd like to be sure that the problem is the EEPROM. It seem a little odd to me that this problem come only with the ATU setting and it's not so usual that a single EEPROM address is damaged. Another strange behavior is that pressing MENU after switching on the radio I have on the display always the first menu element  (ST L) and not the last one I accessed before to switch off the radio.
> Thank you for your help.
>


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