[Elecraft] K1 - low resistance measurement on front panel board

[Don Wilhelm]

Mike,

Remove the microprocessor from its socket and measure the resistance.  
If there is a substantial increase in resistance, that is an indication 
that the DVM/ATTN input to the microprocessor has been damaged (likely 
by static).
If there is no change with the microprocessor removed, the only other 
component could be the regulator (U4).  Be certain it is oriented 
correctly, and as a last resort, remove it and test the resistance 
again.  This is another part that can be damaged by a static charge.

73,
Don W3FPR

Mike Clarke wrote:
> Hi all,
>
> I'm in the process of building my first Elecraft rig (and first ever
> radio project); a K1.
>
> I've reached the stage of doing the resistance checks on the front panel board,
> one of which my K1 is failing.
>
> J1 pin 16 to ground should be between 15 and 18kOhms; but I am
> measuring about 8k.
>
> I have tried:
>
> a) inspecting the board visually, and can't see any obvious bridges or
> bad joints;
> b) measuring R7 in circuit - 3.45kOhms
> c) measuring R6 in circuit - 7.76kOhms
> d) measuring R6 out of circuit - 12.8kOhms
>
> Any suggestions as to what I've done wrong would be most appreciated!
>
> Thanks,
>
>   
>