Reference PDF for the 1SV313 diode, around 73 KB and filed as a schematic. In the JIS scheme the 1SV prefix marks a diode, and Toshiba uses it for variable-capacitance diodes that act as voltage-controlled capacitors. The name gives no package, version or tested status. When a receiver will not tune or a PLL fails to lock, the sheet helps confirm the marking, pinout and expected capacitance across the bias range. Check the package against the board footprint before swapping parts.
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.