At 190 KB this PDF is larger than most entries here and is named for the 2SC982, an NPN transistor according to the JIS 2SC prefix; the TM suffix in the name is not explained by the file name alone. The schematic label notwithstanding, it is expected to be a component datasheet. Use it to check the pinout, package, maximum collector voltage and current, and hFE grouping. Confirm the printed marking on the actual part matches before trusting the sheet for a replacement decision or in-circuit testing.
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.