INTP:
The schematic is spot on, thanks.
Haven't heard of the node thing before but I'm guessing it's just the groups of leads that are connected on a trace area.
Node (circuits): In electrical engineering, node, refers to any point on a circuit where two or more circuit elements meet. Without any further knowledge, it is easy to establish how to find a node by using Ohm's Law: V=IR. When looking at circuit schematics, ideal wires have a resistance of zero. Since it can be assumed that there is no change in the potential across any part of the wire, all of the wire in between any components in a circuit is considered part of the same node.
Each different color in circuit above is a different node
I did my first ever Wikipedia edit just now, removing a sentence from that paragraph that wasn't true.
MrAl:
620nf cap, voltage dropper
That's just my handwriting, it's actually 820 nF. Check the Zener's label to compare it to how I actually write 6's.