Circuit schematic for the Samsung Galaxy Ace 2, model GT-I8160, supplied as a 3.67 MB PDF. The file name carries no revision or variant detail beyond the model number. Service schematics like this show supply rails, the charging circuit, battery connector, display and button lines with net labels, which helps when measuring voltages, tracking down a shorted capacitor or identifying missing parts. Any PDF viewer opens it; search by net name for quick navigation, and match the board revision printed on the PCB against the title block.
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.