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, > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
