Specifications for the 2SA1963 transistor are expected in this 160 KB PDF, which the index labels a schematic. Under JIS conventions the 2SA prefix denotes a PNP bipolar part, and a file named purely by part number is normally its datasheet. Repair use centres on identifying the leads correctly, checking voltage, current and dissipation limits, and choosing a substitute with matching package and gain. The name gives no manufacturer or revision, so confirm the case style against the outline drawing.
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.