PDF reference sheet covering the 2SA1823, 92.1 KB, listed among schematic files. The 2SA part prefix indicates a PNP bipolar transistor in the JIS registration system. Beyond the part number, the file name gives nothing else. Expect electrical characteristics and package drawings. When a board shows a failed transistor in this position, read the pin diagram carefully, verify polarity, and compare maximum ratings with any substitute before soldering it in.
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)