PDF reference of about 41.6 KB for the 3LN01C, indexed as a schematic but by name a single semiconductor datasheet. Apart from the part code, nothing about a device or board is stated. The 3LN01 base appears also with N and M suffixes in this collection, which likely mark different packages of one transistor. Use it to read pin functions, limits and the case drawing while diagnosing or replacing the part. Check the marking code and package on the actual board before trusting the match.
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.