The 2SC3655 transistor is covered in this 91.8 KB PDF. Its 2SC prefix follows JIS numbering for NPN bipolar transistors, and the bare part-number name points to a datasheet, despite the schematic classification. Expected contents are absolute maximum ratings, electrical characteristics and a package outline with pin numbering. Read the pinout before removing or testing the part, and when replacing it confirm the equivalent shares voltage, current, gain and case style with the original component.
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.