A schematic is a diagram of an object or interface simplified for the sake of clarity. Schematics are known by many other names including wireframes, sketches, lo-fis, and blueprints.
Since a schematic reduces complexity, unintended errors and ambiguity can be introduced. Would someone understand from the previous schematic to put cheese on top of the tomato sauce? Maybe not.
This is a case where an exploded schematic is useful, because it shows how the individual pieces come together to form the whole.