ICOM IC-720A

I have been using an ICOM IC-720A which is obviously a vintage transceiver. For some reason the frequency on the digital display is 3.0 MHZ off from the actual frequency being received. The frequency adjustment on the top of the radio is for minor frequency adjustments and will not adjust the frequency over 1 MHZ. Can someone give me some advice on how to return the display frequency to correspond with the actual operating frequency?



Any information will be appreciated.



Chuck Erickson

K7CAE

ICOM IC-720A