Single-part PDF of 47.0 KB for the 2SD2583, listed as a schematic but most probably a datasheet. The 2SD prefix, per the JIS standard, identifies an NPN bipolar transistor for low-frequency circuits. The name carries no extra information such as maker, package or variant suffix. Open in any PDF viewer to check pin assignment, voltage and current ratings and power dissipation, and match the body marking on the board before using these figures to judge a fault or replacement.
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.