Schematic for the Samsung SM-A520F smartphone, the Galaxy A5 2017 model code, in a 3.85 MB ZIP archive, marked as part 1, which suggests the full set may be split across several files. Phone schematics help with tracing power management lines, charging circuitry, display and camera connectors and RF paths when diagnosing a no-power or no-charge fault. Check that the other parts are present if a page seems missing, and compare the board marking against the document, since revisions can vary.
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 @mobile_jump2. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.