[Elecraft] K2 Bargraph

[Don Wilhelm]

Robert,

Looking at the schematic, the only signal that seems to be unique to the 
bargraph is SR WRT.
It starts on Control Board U6 pin 34 and goes to P2 pin 15.  If it goes 
anywhere else, I did not spot it on the schematic.  Check the U6 socket 
pin and the connector pin for proper soldering. 
Since your control board in the working K2 produced the same symptoms, 
then yes, the problem is likely on your control board.

Check also for solder bridges caused by too much solder.

73,
Don W3FPR

Robert Clutson wrote:
> I've reached stage 1 alignment & test on K2 (#6257)and have no 
> bargraph display.
> Borrowed another K2, put my front panel board in - Perfect. Put my 
> control panel in his K2 - no bargraph. Changed MCUs (dangerous 
> business)- IC is Fine.
> What line on the control panel "enables" the bargraph. What do I check next?
> Incidentally Gary AB7MY at elecraft has patience that other 
> businesses could use, but even he needs a weekend off.
> Robert g0who
>
>