Toshiba schematic labelled only as M18, provided as a PDF of around 1.56 MB. The name gives no board number, revision or ODM, so open the title block to identify the mainboard and check it against the code printed on the PCB before relying on the content. Schematics like this are used to trace power rails from the adapter input, verify regulator outputs, follow signal paths and find components near a short. Any standard PDF viewer opens it. Search for net names to move between pages quickly.
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.