PDF datasheet, 89.5 KB, for the 2SC4633 transistor, though the index files it under schematics. The 2SC code places it among NPN bipolar transistors in the Japanese JIS registry. A related LS-suffixed sheet exists in the same set, so compare the two if the board part carries a suffix. Open it in any PDF viewer to confirm pin order, case type and voltage and current limits. This helps when diagnosing a shorted junction or picking an equivalent component.
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)