Datasheet-style PDF for the JEDEC part number 2N7224, 64.1 KB, catalogued as a schematic. Nothing in the file name states the manufacturer, package or document revision, so read the header page to identify them. The content is useful when testing a suspect device out of circuit, looking up gate or base drive limits and pin assignment, or cross-referencing an equivalent. Check that the case type in the sheet matches the part removed from the PCB, as similar numbers can come in different housings.
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.