Schematic PDF named j700f, 771 KB; no brand is given, though the code is commonly associated with a Samsung Galaxy J7 variant, which should be confirmed against the document title block. Phone schematics let technicians trace power rails from the PMIC, follow charging and display lines, and identify components when diagnosing no-power or short faults. Open it with any PDF reader, and verify the board revision printed on the PCB before relying on part values or locations.
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 .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.