The 2SC3922 is the subject of this short 30.5 KB PDF, listed as a schematic with no suffix or revision in its name. The 2SC prefix follows Japanese JIS rules for NPN transistors, mostly high-frequency types, pointing to a component datasheet. Repair use includes reading the pinout, comparing absolute maximum ratings when hunting for an equivalent, and confirming the package type. Open it in any PDF reader, and match the part marking on the PCB to this number before replacing or testing the transistor.
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.