I also saw your other post. There are voltages all over the monitor board that can mess you up, even with it turned off... also the b+ needs to be measured with the monitor on. The 'pin 4' and things like that they're telling you about are places where that particular voltage is present, so it's a place to measure it. I would suggest reading a walkthrough on capkit installation, along with the safety precautions, and more importantly read up on how to discharge a picture tube. When you read all that and think you have a good grasp on it, then you can start actually working on it.
Good luck!