Datasheet-style PDF of 158 KB for the 2SC5765, indexed in the schematics section. Beyond the part number the name is uninformative; the 2SC prefix denotes an NPN transistor under Japanese semiconductor naming rules. Such a document typically lists absolute maximum ratings, characteristic curves, the outline drawing and pin numbering, all handy for checking a component on a board or picking a substitute with matching specifications. Open it in a PDF viewer and compare the package with the fitted device.
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.