Reference sheet in PDF form, about 123 KB, for the 2SC5374 NPN transistor in the Japanese 2SC numbering series. Catalogued among schematics, it is in practice a part datasheet giving ratings, characteristic curves and case outline. When a transistor is shorted or open on a board, this kind of document confirms the pinout, shows expected junction behaviour and lists limits needed to choose a substitute. Any PDF reader handles it; cross-check the code printed on the component first.
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.