Small 30.2 KB PDF for the 2SA1968LS, a variant of the 2SA1968 identified by the LS suffix; what that suffix denotes is not explained in the name and should be confirmed inside the document. The 2SA prefix follows JIS numbering for PNP bipolar transistors. Filed as a schematic, it is most likely the part datasheet, useful for checking lead order, package style and electrical limits. Suffix variants can differ in package or ratings, so match the exact marking on the original part before substituting.
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.