Elecraft KXV3A - Manual (Page 14)

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Check the KIO3 board and ensure the screws holding the two standoffs are tight. Also check to ensure the
connector on the audio I/O daughter board is fully mated with J91 on the KIO3 Main board (see Figure 13).
Figure 13. Check KIO3 Audio I/O Board Mating.
Replace the KIO3 Main Board with the audio I/O daughter board attached in the K3 as shown in Figure 14.
The audio I/O board fits just over the KXV3A board assembly and the TMP cable passes through the space
between the edge of the KXV3A board and the KIO3 board. Ensure the KIO3 connectors are fully mated so the
standoffs line up with the holes in the rear panel.
Figure 14. Installing KIO3 Main Board.
Plug the KIO3 digital I/O daughter board into the KIO3 main board as shown in Figure 15. Be careful to
support the KIO3 main board as shown while pressing the daughter board in place.
Figure 15. Installing the KIO3 Digital I/O Board.