PDF of 30.1 KB covering the 2SA1520, listed as a schematic yet named like a single-part data sheet. JIS numbering places 2SA parts among PNP bipolar transistors. Beyond the part number, the name gives no manufacturer, package or edition. Data sheets of this kind normally show absolute maximum ratings, gain classes, characteristic curves and outline dimensions. A technician checks these values to select a cross-reference part and confirms the lead order, since pinouts differ between packages and makers.
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.