Named for the 2SD2462, this 184 KB PDF is effectively a datasheet for a Japanese-registered transistor. The 2SD prefix in JIS numbering refers to an NPN bipolar transistor for low-frequency work. Consult it for base, collector and emitter positions, voltage and current limits, dissipation and hFE grades. It is handy when a stage has failed and a replacement or close equivalent must be chosen. Match the D2462 marking and the package shape on the board before trusting these 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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The standard format for schematics, block diagrams, power-sequence charts and service manuals.