Schematic for the Samsung SM-A320F, supplied as a 3.51 MB PDF. The circuit pages cover the power management IC, battery and charging path, display and touch interfaces, audio and RF sections. They let a technician measure expected voltages, trace a missing rail or identify the part causing a short. Open it in a PDF viewer and search by net or component name. Confirm that the board revision on the PCB matches the document, as Samsung often changes boards between revisions.
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_mobiles. 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.