Reference datasheet for the 2SB1617 PNP transistor, supplied as a 213 KB PDF. Following Japanese JIS numbering, 2SB parts are PNP bipolar transistors for low-frequency service. The name offers no maker, package or version information. When a component in this series is suspected, the sheet gives the pinout for in-circuit diode testing, rated voltages and currents for judging whether it was overstressed, and electrical curves for choosing a suitable equivalent. Check the printed marking on the board part first.
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.