Datasheet PDF, 149 KB, for the 2SA1710 transistor; the file name gives no further model or board details. Following Japanese JIS part numbering, the 2SA prefix denotes a PNP bipolar transistor. Expect a ratings table, electrical characteristics, possibly hFE classification and an outline drawing of the package. In repair work the sheet serves to confirm pinout, judge whether measured junction behaviour is normal, and choose a replacement with equal or better voltage, current and power ratings when the original part is no longer available.
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.