- Open the bottom cover of the IC-746
- Place radio on surface upside down with front to your left.
- Find chip label HD6433042SFB24
- To the right of this chip (3/4 inch) are two rows of diodes.
- 14 diodes in the right column and 7 diodes in the left column.
For Icom 746 Radios with the diodes in the 1, 2, 6, 7, 9, 11 and 14 positions, remove numbers 6 and 7 leaving the other 5 in place.