[Elecraft] K2 - removal of Digital Filter board

[JohnChanceRead at aol.com]

I am trying to tace a 2 x S point loss in my receiver.  I want to  remove the 
digital filter to remove that as a possibility.  What pins on  the control 
board do I put the jumpers - I cannot find this in the  manual.  I am off on 
holiday to Spain tomorrow and will take the  K2 with me so that I can work on.  
Quick help appreciated
John G4BOU