Bob,

Do you hear sidetone on that K2 when in CW mode and hold the SPOT button?
If not, you have the wrong sidetone source selected.
Go to the menu for STL and hold EDIT to edit the parameter (if you do not hear sidetone at this point, it is a sure sign that you have the wrong source) Now tap the DISPLAY button until you hear sidetone - exit the menu by tapping the menu button twice.

If you can hear sidetone *and* you have a K2 with a SN under 3000, check the wiring between CB U6 pin 25 and pin 1 of P4 to see if that added wire is still intact.

73,
Don W3FPR

On 3/10/2013 7:34 PM, Bob Baxter wrote:


Further info on my problem.  The I/O is inop with either the original or the 
KPA100 plugged in.  I suspect the problem may be on the control board but that 
gets into ICs and I have no idea what goes on in them.
Bob AA7EQ

It's been a few years since I've asked for help but I need some now.  I'm unable
  to get the K2 recognized by any computer program.  So far the voltages have 
checked close until J2.  Pin 1 is showing 2.3v and should be 0, pin 3 is 
showing 1v and should be 5v.  J1 voltages are pretty close.  The port is on, 
first thing I checked.  Any
  ideas?
Bob AA7EQ
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