Schematic document for the Samsung SM-J200F, provided as a 5.21 MB PDF; the name holds only the model code and no revision. The drawings help with tracing the charging circuit, battery connector lines, PMIC outputs and the signal paths to display, keys and SIM slots. Searching net names in a PDF viewer makes it quicker to follow a rail across pages. Before replacing parts, check that the device's model label and board markings agree with the document, as Samsung variants for different markets can change parts of the circuit.
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.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.