An 87.1 KB PDF for the 2SA1766, indexed under schematics. Its JIS part number, with the 2SA prefix, denotes a PNP bipolar transistor, so the document is a datasheet rather than a board diagram; the name gives no further specifics. Repair technicians rely on such sheets to establish which pin is the collector, to check voltage and current ceilings, and to compare gain classes when a direct replacement is unavailable and an equivalent must be chosen.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)