178 KB PDF covering the 2SA1358, a PNP transistor numbered under the Japanese JIS standard, where 2SA means a high-frequency PNP type. The name holds nothing beyond the part number, which suggests a datasheet despite the schematic category. Open it with any PDF reader to confirm the pinout, case drawing, voltage and current limits and the complementary NPN device. Always match the printed code on the component, usually A1358, and its package before substituting another 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.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.