Component reference for the 2SC5197 in a 171 KB PDF, matching the size of related 2SC519x files and possibly sharing one manufacturer sheet with them. Indexed as a schematic, the document is realistically a datasheet for this JIS NPN high-frequency transistor. It should supply pinout, ratings, curves and package drawing, which a technician needs for diode-mode testing, confirming orientation and comparing replacements. Match the board marking with the part number and confirm the right table row applies.
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.