Component sheet for the 2SA1854 in PDF form, about 41.6 KB, placed in the schematic section of the index. The 2SA prefix means a PNP bipolar transistor under the Japanese JIS scheme. The name states nothing beyond the part number, so package type and manufacturer must be read inside the document. When diagnosing a dead stage, a technician measures the junctions with a diode tester and uses the published pinout and limits to choose a proper replacement transistor.
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.