Data reference for the 1SV239, a 70.1 KB PDF whose trailing underscore carries no meaning. The index files it as a schematic. The 1SV designation belongs to Toshiba variable-capacitance diodes under Japanese 1S numbering, so expect a single-part data sheet rather than a board diagram. Use it to check pin identification, marking and capacitance versus reverse bias when troubleshooting a VCO, PLL or tuner section, or when selecting a substitute. Any PDF program will display 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.