Part documentation for the 2SC5302 in PDF form, 89.2 KB, placed in the schematic section of the index. Following JIS conventions, 2SC parts are NPN bipolar transistors, so this is effectively a component datasheet rather than a board diagram. It helps when tracing a power or driver stage where the transistor has failed: confirm the pin order, look up the voltage and current limits and compare characteristics before installing a substitute. Nothing in the name indicates a revision, package variant or manufacturer, so verify against the actual part marking.
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.