Reference sheet for transistor 2SC4474, supplied as a 109 KB PDF and listed among schematics. JIS-registered numbers beginning with 2SC belong to NPN bipolar devices for high-frequency applications, which points to a manufacturer datasheet. The name gives no package, maker or revision details. A technician checks the pin assignment, voltage and current ratings, power dissipation and gain classes here, then measures the junctions in circuit and confirms the marking on the component matches before ordering a replacement.
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.