[Elecraft] K2 Problem: Audio Stuck in "Mute"

[k6se@juno.com]

Jim, WA2UMP wrote:

"Electrically the K2 is in mute as seen by the following voltages:
 
 On Control board:
 U6, pin 17, mute =  5volts   //always muting !!!!
 U6, pin 27, TX = 0 volts      //Not transmitting
 U6, pin 28, RX = 5 volts      //always receive
 8T = 0 volts                         //seems ok
 8R = 8 volts                         //seems ok

For some reason the microprocessor keeps the mute line high."
==========
That's not your problem.  Pin 17 of U6 *should" be +5 volts -- the
designation on that pin is "/MUTE" which means "NOT MUTE".  It goes to 0
volts when muted.

73, de Earl, K6SE
81 countries with K2 #2622 and counting.....