Datasheet covering the 4N35 to 4N37 family of optocouplers, stored as a 276 KB PDF and catalogued as a schematic. These devices share one six-pin package and pinout, differing mainly in specified isolation and transfer characteristics, which is why a single document usually describes the range. Repair technicians consult it to verify pin functions, absolute maximum ratings and test conditions when checking or replacing an isolator in a power supply or control board. Confirm the exact suffix printed on the original part.
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.