Under the name 2SC5064, this 468 KB PDF is filed as a schematic, yet the identifier is a Japanese-standard NPN transistor number, so a datasheet is what to expect inside. The name provides no manufacturer, package or revision information. Such a document helps when a discrete transistor is suspected shorted: it shows which pins to measure and what limits apply, and it gives the specifications needed to judge an alternative part. View it with any PDF reader.
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)