Small PDF reference, 47.7 KB, for the part 2PD601A, with the trailing 4 most likely the sheet revision. Despite the schematic label, the naming matches a transistor data sheet, not a device circuit diagram, and no brand or board is stated. Useful for checking pinout before replacing a damaged component, confirming ratings of a proposed substitute and identifying parts by marking code. Note the neighbouring 2PD602A sheet in the same series. Open it in any PDF viewer and compare package type with the component actually fitted.
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.