Full schematic for the Samsung Galaxy A73, model SM-A736B, stored as a 12.5 MB PDF document. A technician can use these pages to see how power is distributed from the PMIC, which parts sit on the charging and USB path, and how the display, camera and RF sections connect to the main board. That speeds up isolating shorted capacitors or missing voltages. Any PDF viewer will open it. Before measuring against it, confirm the phone's model code matches SM-A736B, since component choices can change between regional variants.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @uzb4422. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.