The 1SS190 is the only information in this file name, apart from an underscore. The 68.1 KB PDF sits under the schematic category. Toshiba assigns the 1SS prefix to small-signal switching diodes, so treat the document as a component data sheet. It usually shows the package outline, how the diode elements connect to the pins and the electrical limits. That helps you trace a suspect part, test it with a meter in diode mode and choose a compatible substitute. Open it in any PDF viewer.
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.