Datasheet PDF for the 2SA1048, with an L in brackets in the name that probably refers to a gain rank or variant, though this is not explained. Size is 238 KB and it is listed under schematics. The 2SA prefix denotes a PNP bipolar transistor in JIS numbering. Many such parts are sold in gain grades marked by a letter, so check the stamp on the original and use the sheet's hFE table to select a matching replacement.
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.
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