[Elecraft] KNB2 trouble...

[LA2MOA]

Hi all!

I´ve just finished installation of the KNB2 into my K2. When tapping
the "NB-button" on the K2, the display shows "Not Inst". I have
re-examined the KNB2 board. U3 is installed/soldered correctly and as
far as I can see no other components are installed incorrectly or
backwards. I have also made a few measurements on P12 on the KNB2
board and on U3, where pin 1 measures 6.1 volts and pin 8 measures 0
Ohm´s so everything seems to be correct.

The modifications on the K2 RF board in order to install the KNB2
module are made according to the instructons in the KNB2 manual.
While examining the board, everything seems to be correctly done
without any solder bridges.

Still the display shows "Not Inst" while tapping the NB-button.

Any suggestions?

Regards,

Hans / LA2MOA
K2 #4896