[Kenwood] TS930 Receive Frequency offset by 500Khz

[Jim Dicso]

First indication of trouble was that the TS930S didn't hear signals on 20 meters.   

I checked all bands using an HP8640B Signal Generator.     Results with RF gain full on and audio gain at 1/4 full scale:
a)  copy signals on 160, 80 and 12 meters down to -130dbm or better.
b)  all other bands required signal levels around  -30dbm 

By accident, I found that the defective bands actually had normal sensitivity to signals 500Khz off the set frequency.
Here are the readings vs HP8640B settings:

HP8640B  Freq             TS930S  Freq          Copy signals @
6600 khz                        7100 Khz                    -125dbm
10625 khz                     10125 khz                   -140dbm
14600 khz                     14100 khz                   -135dbm
18600 khz                     18100 khz                   -130dbm
21600 khz                     21100 khz                   -135dbm
28600 khz                     28100 khz &                -130dbm
                                        28600 khz


This unit has been upgraded with PIEXX digital board replacement.

I'd appreciate thoughts and advice on solving this problem.