PDF of 124 KB titled 2SC5322FT, a JIS-style NPN transistor code with an FT suffix that the name does not explain, likely a package or variant designation. Filed as a schematic, it is far more probably a datasheet. Typical content covers ratings, electrical characteristics and the mechanical drawing. Because suffixes can change the package or pinout, compare it carefully with the plain 2SC5322 sheet and with the component itself before fitting a substitute or interpreting meter readings.
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.