Samsung R18 notebook schematic, a 1.36 MB PDF file. The name carries only the model, with no board number, code name or revision, so treat it as a reference until the PCB markings confirm a match. With it you can trace voltage regulators, power-enable signals, clock and reset lines, and find the reference designators of fuses, MOSFETs and coils when checking for shorts or missing rails. Any PDF reader works, and searching by part designator or net name helps you move quickly through a multi-page diagram.
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 @cyberlanelectonik. 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.