A short 40.2 KB PDF for the 2SC3134, an NPN bipolar transistor according to the JIS 2SC scheme. The modest size suggests a concise sheet with ratings, characteristics and a pinout. Nothing beyond the part number appears in the name. Expect the component to carry a C3134 marking. Before desoldering a suspect part, use the pinout to test junctions in diode mode, then confirm any replacement offers equal or higher voltage, current and power ratings in a package that fits the existing pads.
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.