Elecraft K2 Owner's Manual - Manual (Page 20)

E
LECRAFT ® 19
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The connectors along the bottom edge of the board (P1, P2
and P3) will be installed next. It is very difficult to remove them once
they are soldered. Follow all instructions carefully.
Hold the Control board vertically as shown in the side view
below (Figure 4-7). The top side of the board--the side with most of
the components--should be to the right.
Turn to page 8 and review Figure 3-3, which shows how the
Control board plugs into the RF board. P1, P2, and P3 will all be
installed on the top side of the Control board as shown.
Position 6-pin right-angle connector P1 as shown in the side view
below (Figure 4-7). Do not solder P1 until the next step. The plastic
part of the connector must be seated flat against the PC board, and the
pins must be parallel to the board. Do not bend or trim the pins on the
bottom of the board.
Top side of
PC Board
P1
Figure 4-7
Solder just the two end pins of P1, then examine the placement of
the connector. If P1 is not flat against the board, re-heat the solder on
the end pins one at a time while pressing firmly on the connector.
Once it is in the right position, solder all pins. Do not trim the leads.
Top side of
PC Board
P3
Figure 4-8
Install P3, the 20-pin, dual-row right-angle connector (Figure
4-8). Use the same method you used for P1. Do not solder P3 until you
are sure that it is seated properly.
Install P2, the 36-pin, dual-row, right-angle connector. Use the
same method you used for P1 and P3.
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When you install ICs in the following steps, always straighten
the leads of each IC first as shown in Figure 4-9. The two rows of pins
must be straight and parallel to each other to establish the proper pin
spacing for insertion into the PC board or socket.
To straighten the pins, rest one entire row of pins against a hard, flat
surface. Press down gently on the other row of pins and rock the IC
forward to bend the pins into position as shown below.
Straight
Flared
Figure 4-9