PDF of 154 KB for the 2SD2202, listed as a schematic but named like a transistor datasheet. Under JIS coding, the 2SD prefix identifies NPN bipolar transistors for low-frequency use. Such a sheet gives the ratings and characteristic curves needed to judge whether a part has failed and what can replace it, plus a dimensioned package outline. Confirm that the lead order matches the footprint before fitting any substitute.
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.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)