Instruction manual

SM100 • 10
Now, let's get building!
First things first. You'll notice that the two circuit boards are connected
together. Before we begin building. we’ll need to separate the circuit boards
by gently twisting the smaller SM100A circuit board to separate it from the
larger SM100C board. You may use a small file or sandpaper and take off
any sharp edges that were created when the PC board “broke”.
Since you may appreciate some “warm-up” soldering practice as well as a
chance to put some “landmarks” on the PC board, we’ll first install some
“hardware” components. This will also help us to get acquainted with the up -
down, left - right orientation of the larger circuit board. Remember that the
components will be mounted on the “component” side of the circuit board
and soldered on the “solder” side of the circuit board.
Be sure to save some of the clipped component leads to use as
“jumper “ wires in the circuit.
 1. Identify and install DPDT switch S1. Be sure to push the switch flush
into the circuit board. Solder all six connections.
 2. Install the front panel 10K trimmer pot [R6]. Once again, be sure to
push the component flush to the circuit board before soldering.
 3. Moving to the rear of the circuit board, install the three PC mount RCA
phono jacks [J1, 2, 4]. These jacks will “snap” into place before
soldering. Don’ be afraid to use enough heat to completely solder the
grounding tabs as they will also provide strain relief when hooking up
your completed kit.
 4. Install the sub-miniature jack J3. Be sure that all three leads protrude
through the circuit board before soldering.
 5. Install R17 [small trimmer marked 502M]. Be sure that the
screwdriver “slot” for adjustment faces towards the outside of the circuit
board.
That wasn’t so bad, now was it! You’ve just installed the controls and
interfacing connectors of your signal magnets’ controller board. Take a
minute now to check over your connections and resolder any that are less
than perfect. Now we’ll get back to work on the power supply section of the
circuit.
 Identify the two 1N4002 epoxy type diodes. Notice how one end is
marked with a band. Be sure that this band is oriented as shown in the
parts diagram.