[Elecraft] K3 FSK RTTY Problems

[Gordon LaPoint]

Hi All,
     This weekend my K3 stopped working with FSK.  AFSK works just 
fine.   I have ran many RTTY contests with the K3 in FSK mode, using 
various software drivers.   The problem is I get a single tone, but at 
the wrong frequency, Its about 200hz, not 2125Hz.  I checked the pitch 
setting, its still setup for High tones, the radio keys just fine, I 
have not checked the fsk input signal, but even if that was bad and not 
toggling I should still have an output at the Mark frequency, not way 
low at ~200hz.
I reloaded firmware, - no change.   The K3 is a mid 5000 serial number 
and has worked flawless for many years of RTTY contests.
     This one has me baffled, any suggestions?   (I switched to AFSK 
setup for now).

Gordon - N1MGO ("Bambi" on RTTY)