Only the code 2SC5347 identifies this 115 KB PDF, so no model, board or revision is known. In Japanese JIS designation, 2SC marks an NPN bipolar transistor meant for high-frequency circuits, making a component datasheet the likely content despite the schematic tag. It should list ratings, characteristics and pin assignment needed to test the device or choose a replacement. Open it in any PDF reader, and compare the package and marking of the actual part before substituting anything.
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.