Schematic document in PDF, 1.24 MB, for the SM6225 processor, with an appended SM62 family tag. No phone model or board revision appears in the name. Such a section shows how the SoC connects to the power management IC, memory, storage and peripheral buses, which helps a technician trace absent voltages or isolate a shorted capacitor around the CPU. Treat it as generic guidance until you confirm the component references match the specific handset motherboard you are repairing.
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 @mischematic. 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.