IC-9700 mod: enable AF out on mic

To enable the AF output on Pin 8 of the MIC socket (AFO line), solder a bridge across test point CP421 on the DISPLAY board.

Schematic: Service manual, p. 10-17.
Board layout: Service manual, p. 7-10, to left of R421


    • Guil on 09/10/2021 at 11:58
    • Reply


    Many thanks for this info, I have just do it this morning and it’s working very well !
    I don’t understand why this function isn’t active when we bought this rig….

    Bes 73′
    F4CPS Guillaume

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