A 59.6 KB PDF for the 2SC829, an NPN transistor under JIS numbering; the _E suffix in the name is not explained and may indicate a language edition or document revision. It is indexed as a schematic but likely contains the datasheet. The document helps confirm pinout, frequency and power ratings when servicing older radio or audio circuits where this type appears. As with any substitution, match the case style and lead order to the PCB before fitting a replacement part.
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.