The 2SB1320A, a suffixed variant of the 2SB1320, is described in this 56.6 KB PDF filed under schematics. An E at the end of the name may indicate an English edition, though that is not certain. Japanese JIS designations starting with 2SB are PNP bipolar transistors for low-frequency circuits. Open it in a PDF viewer to confirm the package and lead assignment, compare collector ratings, and make sure any replacement carries the same letter suffix or better specifications.
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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