Filed among schematics, this 61.3 KB PDF actually documents a single part, the JEDEC-registered 1N485B diode. Expect maximum reverse voltage, forward current, reverse leakage figures and a drawing of the package with polarity marking. The sheet helps when an old analog or instrument board has a diode that measures leaky or open, and when cross-referencing to a currently available type. Confirm that the replacement matches or exceeds the reverse voltage and has comparable low leakage, then align the cathode band as on the original.
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.