Having the PDF is step one. Step two is annotating it with your own voltage measurements and common fault notes. Over time, you’ll remember that “C4514 shorted = display flicker” without looking it up.
Identify specific test points to check if the CPU, RAM, or PMIC are receiving power. redmi note 10 schematic diagram download
Search R1204 in your schematic PDF reader. The diagram will tell you its exact specifications (e.g., 10k ohm, 1/16W, 1% tolerance). Having the PDF is step one
