Elecraft K1 - Manual (Page 18)

E
LECRAFT 17
5. Front Panel Board
The liquid-crystal display (LCD), switches, and other controls are
located on the Front Panel board, as well as the microcontroller.
See Appendix D for photos of the completed assembly.
Open the bag labeled FRONT PANEL and sort the parts into
groups. Observe anti-static precautions with ICs and transistors.
Locate the front panel PC board, which is labeled "K1 FP"
along one edge. In the steps that follow, we will refer to the side
with the switches and LCD (S1-S6 and DS1) as the top side.
Place the board in front of you with the bottom side up.
Locate the component outline for J1, below the large hole.
Install a 20-pin female connector (receptacle) at J1 as shown
in Figure 5-1. Do not solder yet.
J1
Bottom
side
Top side
(with LCD)
Figure 5-1
Solder one pin of J1 on the top side, near the middle of the
connector. If J1 is not seated flat against the PC board or is tilted,
re-heat the solder and press down on the connector.
Once you're sure that J1 is correctly installed, solder the
remaining pins. Do not use an excessive amount of solder.
Locate the Switch Spacing Tool (made of PC board
material).
Position push-button switch S1 on the top side of the board as
shown in Figure 5-2, using the switch spacing tool to set the switch
height. Make sure all four legs of the switch are centered in their
holes, then gently push the switch until it is resting flush against the
switch-spacing tool. (Caution: switch pins are fragile.) Do not
solder yet.
S1
Figure 5-2