PDF document of 96.1 KB tied to the 2SC3896 transistor, named under the JIS standard in which 2SC indicates an NPN bipolar part. The name does not mention package, manufacturer or application, so it is best read as a datasheet. Technicians open it to confirm base, collector and emitter positions, check voltage, current and dissipation limits, and decide whether a common substitute will work. Any PDF reader handles it. Compare the package and code printed on the board with the documented outline.
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.