[outlawmws]

In thinking about your questions and how they are phrased, I’m concerned that you are going into a HIGH VOLTAGE TV with this apparent level of understanding.

You do realize that even if unplugged dangerous levels of voltage are stored in some devices? High enough to kill you.

Safety:
Discharge all the large capacitors prior to poking around in there. Be sure to ground the chassis in some way. Use a ground strap on the wrist that you are using to work in there and only use the one hand. (Electrical path from one had to the other goes thru your heart, potentially stopping it)

Talk to other experienced TV guys about safety; my comments are in no way complete.

Schematic reading:

The lines represent continuity; the dots at line junctions represent a connection. Two crossed lines with a dot is a connection, without the dot is no connection. Look at the dots carefully, as a misprint could place a dot where none exist. Better schematics never allow a 4 way connection to eliminate this potential issue, but I can see this older schematic did not follow that practice, so you need to be careful.