Schematic package for a device coded A336B, a code consistent with Samsung's SM-A336B, with the E.M.0 suffix likely marking the main board sheet set and revision. The 4.61 MB zip should contain the circuit pages covering the power tree, charging circuit, display and camera connectors and RF sections. Use it to follow voltages from the battery connector through the PMIC, identify components on a shorted line and confirm pin assignments. Match the revision printed on the PCB before trusting the drawings.
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 @phoneSchematics. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.