Short PDF of 21.2 KB covering the 2SA1575, probably a brief part datasheet despite the schematic label. The name contains no device or manufacturer information. Under JIS rules, 2SA identifies a PNP bipolar transistor for high-frequency circuits. Technicians use such sheets to confirm the emitter, base and collector pins and the breakdown and current ratings before replacing a damaged component. Check that the package type in the drawing matches what is soldered on the board, since outline variants exist.
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.