Spanish document about the diode, a 373 KB PDF of component theory rather than a schematic for a specific device. The name gives no product or board number. Material on diodes usually explains the PN junction, forward voltage, reverse bias, and types such as rectifier, Zener, Schottky and LED diodes. It often also shows how to test one with a multimeter in diode mode. Any PDF reader opens it. Useful background when checking protection diodes, rectifiers or shorted rails on a board.
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 @canalesquematicos. 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.