[Elecraft] No Shaft Encoder Function

[Don Wilhelm]

Bill,

Do you have 5 volts on encoder pin 1?
If you have a scope, can you see any negative going pulses on encoder 
pin 4?  If no 'scope, how does the DC voltage at Front Panel U3 pin 14 
compare to the voltage in the DC voltage chart at the end of the manual?

If you have a 'scope, you can look for pulses as the encoder is turned 
at Control Board U6 pin 8 (ENC A) and pin 16 (ENC B).  If you do not 
have a 'scope, turn the K2 power off and check continuity between 
Encoder pin 2 and Control Board U6 pin 8, also from encoder pin 3 to CB 
U6 pin 16 - you should have continuity.

If all those checks are OK and it still does not work - try a  front 
panel from a different K2 if you can - if that works, then you may have 
a bad encoder (a very rare occurrance).  Swap the Control Board from the 
other K2 and see if that brings the encoder to life (this checks the 
microprocessor end of things).

73,
Don W3FPR


William M. Spaulding, SR wrote:
> Hi All,
> 
> I am having trouble getting the shaft encoder to function and, therefore, the frequency to change along with all other encoder functions.  I posted this before and got no response.  So I thought I'd try again.
>