Data sheet sized PDF of 45.9 KB named 2PC4617J, revision 2 judging by the suffix. The J suffix normally separates a package or variant from the base 2PC4617 part, which has its own sheet, so check which one is fitted. The content should cover pin assignment, electrical limits and marking information rather than a board-level schematic. Technicians use it when testing or replacing a small transistor and when searching for equivalents. Any PDF reader opens it; always match the marking and footprint on the PCB.
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.