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ITS1A CLOCK
Inductor
Solder in L1, the inductor.
Electrolytic Capacitors
Electrolytic capacitors are polarized. The negative lead must go in the negative hole and the positive
lead in the positive hole. The capacitors have a white stripe on the negative side, this should be lined up
with the white marking on the PCB footprint – the lead on that side should go through the round hole.
Solder in C18, this is the 220uF capacitor next to M1.
Solder in C2-C13. All of the stripes will face the same way. One technique to get them to line up nicely is
to use tape along the tops to hold them in place.
Solder in C14-C17. All of the stripes will face the same way, but this will be the opposite way of C2-C13.
Solder in C20 and C21.
Power Test
You can test the power now. You need to do this test before you solder in the voltage regulator. Once
that is in, the power supply will be disabled unless the EPS-01 enables it. As mentioned at the beginning
of this document: This PCB generates very high voltages that may be lethal. Furthermore, it can take
several minutes for those voltages to drop to safe levels after power has been removed because of
charged capacitors.
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