[ICOM] IC-24AT

[Gary Fiber]

David,

Found this on qth.net and it should work. Unless you have a real early 
model that needs a diode removed.
You have to remember to do it in sequence and make sure you do not 
release the keys early when opening the receiver.
I do not remember if the direct entry works unless you open the 
receiver. Lastly you may have to reset the cpu to get this to work. 
Every time the cpu is reset
you will need to do this procedure all over again.

Gary K8IZ

o Turn the power switch off.  While simultaneously holding the
     "light" button, the "B" button, and the "#" button, turn the
     radio on. All elements of the display will light up. 
     Continue holding the buttons until the display goes out. It
     may be helpful to have a buddy give you an extra hand during
     this procedure....Your unit will now receive out of band.
The older models of this transceiver, require the removal of
diode D13, before performing the above procedure.  D13 is on the
main logic board and is a discreet diode near the center of 
the board.  It is the diode on the left of the two on the board
when the radio is open and held with the controls away from you. 

     The "stock" transceiver, was also not designed, to provide
full direct keyboard entry of the operating frequency.  This can
also be modified by one or both of the two procedures below;
   o To directly key in the 10Mhz. frequency, simultaneously hold
     the "light" button and the "2" button, while turning the
     radio on.
   o To directly key in the 100Mhz. frequency, simultaneously
     hold the "light" button and the "3" button, while turning
     the radio on.