Small 25.5 KB PDF for the 2SA1816, bearing an _E suffix in its name and catalogued as a schematic. Under JIS rules the 2SA prefix marks a PNP bipolar transistor. The compact size suggests a brief sheet with ratings and an outline drawing. Use it to confirm pinout and limits when replacing a damaged part, and check the marking code on the component body, because small SMD transistors often carry only a short code rather than the full part number.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)