PDF schematic for the Samsung SM-M317F, the Galaxy M31s, 4.41 MB in size. It probably covers the main board circuit diagrams, including power management, battery charging, USB, display and camera connector sections. Use it alongside a multimeter to trace missing voltages, check connector pinouts and spot the components sitting on a shorted rail. Text search in a PDF viewer helps jump to part references. The board must be the M317F variant, since the similarly numbered M315F uses a different design. Other M317F archives in this index may contain related material.
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.