This 52.0 KB PDF covers the 2SB1218A, the A suffix being part of the stated part number, with a further _E tag in the name; despite the schematic category it is likely a datasheet. The 2SB prefix in JIS numbering means a PNP low-frequency transistor. Lettered variants can differ in voltage rating, so confirm the exact marking on the board matches the A version before using its figures. Read pinout, package and maximum ratings in any PDF viewer when choosing a 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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