Small PDF, 33.9 KB, covering the 2SK1036 N-channel field-effect transistor from the JIS 2SK range. The name holds only the part number, so this is most likely a concise datasheet with ratings and pin layout rather than a board schematic. It supports identifying terminals, checking limits and comparing equivalents during repair. Any PDF reader opens it. Before replacement, test the original part out of circuit and make sure the substitute matches voltage, current and package.
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.