Covering the plain 2SC1627 without suffix, this 211 KB PDF sits in the schematic category but names only a part number. The 2SC prefix follows JIS practice for NPN bipolar transistors, so the content is likely a datasheet listing terminals, package, electrical limits and curves. A related A-suffixed version is filed separately, and specifications can differ between them, so check the marking on the fitted part. Technicians use such sheets when testing junctions, tracing a failed stage and selecting equivalents.
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.