Datasheet-style PDF of 170 KB for the 2SC1627A, the A-suffixed variant of a JIS-numbered NPN bipolar transistor, indexed as a schematic. Suffixes commonly mark versions with altered ratings, so confirm the part on the board is exactly 2SC1627A; a separate sheet for the plain 2SC1627 also exists in the index. Use it to look up pinout, absolute maximum ratings and gain grades. Typical repair uses are verifying a suspect device with a meter and choosing a substitute with equal or higher ratings.
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.