[Elecraft] K2 VFO Freq Display Stuck (again)

[Don Wilhelm]

Casey,

Yes, it appears that both /EncRD and EncB are indicating a problem. I 
thought we had determined that EncB was OK the last time through, so 
double check that and rotate the knob through at least 1/2 turn.

If both those lines are stuck at or near zero, the next step is to 
determine if it is the encoder or what is on the other end of those 
lines.  Unsolder the wires from holes 3 and 4 going to the encoder - 
then make the same measurements directly at the encoder pins.  Plus 
(with those wires still disconnected), make a voltage measurement at 
Front Panel U3 pin 14.

We can use that data to determine whether the encoder is the problem or U3.

73,
Don W3FPR

On 6/17/2012 6:12 PM, TI2/NA7U wrote:
> Don,
>
> EncA varies between 0 and 4.8V at each "tick" of the encoder
> EncRD varies between 0 and about .06V
> EncB also varies between 0 and .06V - this seems to be a problem.
>
> 73,
>
> Casey
>
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