I don't think it's feasable for a human to remove the chip manually. The soldering process, if you read the documentation I posted, involves heating the entire surface and the entire processor attaches itself to the board.
You aren't going to find anything about the system board because these boards are custom manufactured for Dell for each model of laptop produced. Sure you might find a service manual, but it's not going to tell you much more than how to swap it out for a new one when failure indicates it. That's how computers and laptops are serviced these days. Everything is a FRU, or field replaceable unit, including the system board as a whole. No one services individual components on the logic board.