Have you ever noticed some connections on a schematic that just look plain unnecessary? Take a look at CN1 on this diagram. If you trace out those three wires, it may not be immediately obvious to you what the point of them is. Let's look at each connection individually, starting with pin 1. Well that looks pretty standard. It takes a direct path to neutral with no components in between. Nothing unusual about that -- the board needs its own neutral supply in order to run, a