Part-number reference for the 2SC4433 in PDF form, about 71.5 KB. The name gives no board or device, only the JIS designation, where 2SC denotes an NPN bipolar transistor, so expect datasheet content rather than a full circuit diagram. It helps when identifying a failed transistor, checking which leg is base, collector or emitter, and judging whether a candidate substitute meets the voltage and current limits. Open it in any PDF viewer and match the body marking on the PCB before relying on it.
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.