There are 18 Schematics are in the entire game.
Schematics are large white pieces of paper with curled sides, pressing up on the dpad will scan the area and light up any collectibles such as schematics. They also appear on the mini map by pressing the back button.
The first enemy schematic to appear in the game is in Chapter 2. When you walk down some stairs (with a Ceramic Egg to the right) into the large room with AA gun's cooling units there is another room to the right of the stairs and the schematic is located within.