Datasheet-style PDF covering the TIP29 and TIP30 complementary power transistors, filed here under the schematic category. The TIP29 is the NPN part and the TIP30 its PNP complement, both in a TO-220 package. Technicians use such a sheet to confirm pinout, voltage and current ratings, gain and safe operating area before fitting a substitute in an amplifier, linear regulator or driver stage. Check the suffix letter on the original part, since the A, B and C versions differ in voltage rating. Any PDF reader opens it.
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.