Samsung SM-G350E schematic provided as a 3.07 MB PDF; the name gives only the model code, with no board revision. Phone schematics show the power management IC, battery and charging circuits, connectors and signal lines, and help locate components when chasing shorts, dead charging or missing display. Open it with any PDF reader and search for part designators. Compare the revision printed on the phone's main board with the document, as layouts can differ between production runs.
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 @Schematic_mobile_iran. 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.