Elecraft K3 Assembly Manual - Manual (Page 43)

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Mounting the DSP Board Assembly on the Front Panel
Locate the main DSP board and install the nylon standoff near J51 as shown below. Be sure you place it in
the correct hole near the edge of the board. The standoff is also shown in Figure 56.
CAUTION: To avoid damaging a circuit trace very close to the metal ring around the screw
hole, position the lock washer under the screw so the split faces away from the trace. Tighten the
hardware by turning the standoff while holding the screw and lock washer stationary. Do not
over-tighten the screw. It is easy to strip the threads in the nylon standoff.
Figure 57. Installing the Nylon Standoff.
Place the front panel assembly face down on a soft, clean surface to protect the finish. The back side of the
front panel board should be facing upward.
Position the large flat washer on the inside of the front panel over the PHONES jack hole (see Figure 60 on
page 44). This is easily done by sliding the washer into place from the end of the front panel.
Gently position the DSP board on the front panel board so that the large jack fits through the cutout in the
front panel board with the threaded section passing through the large flat washer and the circular opening in the
front panel. Adjust the position of the board as needed so you can see the standoffs on the front panel board
lined up with the screw holes in the DSP board.
Pick up the assembly while holding the DSP board in place and inspect the position of the two male plugs
on the DSP board. They should mate with J31 and J32 on the front panel board. J31 is near the encoder for VFO
A and J32 is between the two dual potentiometers. Adjust the DSP board’s position as needed so the pins enter
the corresponding holes in the sockets on the front panel board.
Use a strong light to look between the boards to be sure the connectors are properly mated. Be
especially careful to check the connector near the dual potentiometers. Be sure the pins are
entering the socket and not resting alongside it.