The 2SA1869 is covered by this 174 KB PDF, a PNP bipolar transistor in the Japanese JIS 2SA series. The file carries no device or board information, so it should be read as a component datasheet despite its schematic classification. Repair use centres on confirming base, collector and emitter positions, reading voltage and current limits and checking gain groups. These are needed to judge a measured fault or select a substitute. Parts on the board often carry only the A1869 code, so match the package as well.
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.