Reference PDF of 260 KB for the 2SC388ATM transistor, an NPN device in the Japanese 2SC series with an A-grade designation and TM suffix in its name; the suffix meaning is not stated. Although indexed under schematics, it most likely holds the datasheet. Open it in a PDF reader to confirm pinout, high-frequency characteristics and maximum ratings. When repairing vintage RF or IF stages, verify that the replacement matches both the letter suffix and the package shown here.
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.