ELECRAFT KRX3 Dokumentacja Pobierz pdf (Strona 13)

Installing the KBPF3 Board on the K3 RF Board

There are three connectors on the bottom of the KBPF3 board that must be properly mated to P44A, P44C and

P44E on the RF board (see Figure 12). Even though the connectors may be hard to see as they are mated,

especially if the KPA3 shield is installed, they can be aligned as follows:

Set the KBPF3 board in place over the standoffs, aligning it so the holes in the KBPF3 board are aligned

with the screw holes in the tops of the standoffs. This will align the connectors.

Press down on the KBPF3 board to mate the while checking to ensure that the holes in the board are aligned

with the holes in the standoffs. Note that simply installing the mounting screws will not ensure the 3-pin

connectors are fully mated. When properly mounted the KBPF3 board should rest on top of the standoffs and

be parallel with the RF board underneath.

Attach the KBPF3 board with a 4-40 1/4” (6.4 mm) zinc pan head screw and lock washer at each standoff

as shown in Figure 12.

NO LOCK WASHER

BETWEEN KBPF3 BOARD

ND STANDOFF

4-40 SPLIT LOCK WASHER

4-40 1/4" (6.4mm) ZINC PAN HEAD SCREW

ESD SENSITIVE!

KBPF3 BOARD

KPA3 SHIELD

(IF INSTALLED)

STIFFENER

NOT SHOWN

FRONT

OF K3

P44E

P44C

P44A

BOARD

KBPF3

BOARD

Figure 12. Mounting the KPBF3 Board.

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ELECRAFT KRX3 Dokumentacja Strona 13