Filed as a schematic, the 51.8 KB PDF for the 2SA1534 carries an _E suffix in its name whose meaning is not stated; the content is most likely the datasheet for this JIS transistor. The 2SA prefix indicates a PNP device for high-frequency service. Such sheets give package dimensions, pin layout, maximum ratings and characteristic curves, useful when diagnosing a dead stage or picking a substitute. Open it in a PDF reader and check the component marking on the PCB matches before replacing anything.
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.