Indexed as a schematic, this 33.2 KB PDF is named after 2SC5669, a Japanese-standard NPN bipolar transistor designation, which points to a datasheet for a single discrete part. No brand, package or version is stated in the name. Repair work with such a file typically means checking the pin assignment before probing with a meter in diode mode, confirming absolute maximum ratings, and choosing an equivalent when the original is unavailable. Any standard PDF viewer will display it.
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.