BX-245 • 3
© Box 73 Amateurfunkservice GmbH 2019
The following tools are required for as-
sembly:
– temperature-controlled soldering iron
60 … 80 W with pencil soldering tip,
– solder 0.5 ..1.0 mm with flux core
– 100 W soldering iron with chisel-shaped
soldering tip,
– PCB side cutter pliers
– flat-nose pliers,
– 3mm slot screwdriver,
– Phillips screwdriver,
– two 1.5V AA batteries (Mignon) for
power supply.
Before fitting the board, the contents of
the kit should be checked off against the
parts list in the appendix.
n
Assembly of the board
The few remaining components to be sol-
dered
are fitted only on the SMD Com-
ponent (top) side of the motherboard
.
The position of the individual parts is
shown on the assembly plan (Fig. 2)
Switch and USB Interface board
First, the slide switch S1 is soldered to the
topside of the board. It should rest flush
on the board with no space underneath, its
actuating knob must be horizontal with re-
spect to the board surface (Fig. 3). The
easiest way to achieve this is if only one
of the solder pins of the switch is soldered
first. After that, the switch can still be eas-
ily aligned while heating the solder joint.
When the correct mounting position is
found, all pins and the two housing tags
are soldered.
The USB Interface Board is to be soldered
directly to the top side of the main board
with the supplied mica washer inserted for
isolation purposes. The washer must lie
flat and be placed exactly between the cor-
responding soldering surfaces (Fig. 4).
The front edge of the USB socket then
projects slightly beyond the main board to
terminate flush with the housing shell. Tin
one of the relevant solder pads of the main
board first, then positioned the USB board
including mica washer and fix the USB as-
Fig. 1: View of assembled FA-VA5 – Power
switched off
Building instructions
