Component sheet in PDF for the 2SD2248, 100 KB, which the index places among schematics. No device or board is named, just the transistor type. Under Japanese JIS numbering 2SD means an NPN low-frequency bipolar transistor, often marked D2248 on the package. Use the ratings tables, characteristic curves and pin diagram when replacing a failed unit or comparing equivalents, and verify the orientation on the PCB silkscreen before soldering a new part in.
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)