Datasheet-type PDF of 220 KB for the 2SC5260, carried in the schematic section of the index. The 2SC designation belongs to the Japanese JIS scheme and marks an NPN bipolar transistor; the name gives no package or variant details. Repair technicians open such documents to confirm which pin is collector, base or emitter and to read voltage, current and power limits. Verify the printed code on the original device first, then use the listed ratings to judge any substitute before soldering it in.
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.