Named for the 2SC2995, this 510 KB PDF is listed as a schematic but most likely holds the datasheet for a JIS-numbered NPN transistor, as the 2SC prefix indicates. No manufacturer, package type or edition appears in the name. Repair work uses such pages to check absolute maximum ratings, pin assignment and typical characteristic curves when diagnosing a shorted or open transistor or choosing an equivalent. Verify that the printed code on the board component really reads 2SC2995, as small packages often carry abbreviated markings.
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.