PDF documentation of the 1SV307 diode, about 69 KB and listed as a schematic. The part number follows the JIS 1SV pattern, which Toshiba uses for variable-capacitance diodes. No package, revision or application is named. The sheet is handy for checking the capacitance range against bias voltage, the reverse voltage rating and pinout. Use it when a tuned circuit misbehaves or a cross-reference is needed, and confirm the footprint and marking on the PCB before ordering a replacement.
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.