Named 1SV230, this 72.8 KB PDF is catalogued under schematics; the underscore at the end of the name appears to be incidental. No product model, maker or board revision is indicated. Since the 1SV prefix generally denotes varactor diodes, the document most likely contains component specifications rather than a board diagram. Use it to confirm anode and cathode orientation, check the capacitance range against circuit needs and identify replacements. Make sure the code on the actual diode matches before relying on 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.