Component document for 2SA1987, a 173 KB PDF. Following the Japanese JIS convention, the 2SA prefix designates a PNP bipolar transistor, so the file is expected to be a datasheet even though it is catalogued as a schematic. The name gives no maker, package or complementary part. Use it for pinout, maximum ratings and characteristic curves, and verify the package and pin order against the board before fitting a replacement or a cross-referenced equivalent.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)