A 141 KB datasheet in PDF for the PC1602LRU-NSO-B, a sixteen-character, two-line LCD according to its 1602 designation, with NSO-B marking the specific build. Material in such sheets normally covers pin assignment, absolute maximum ratings, electrical characteristics, backlight data and a mechanical outline. Technicians use it to trace why a panel stays dark or unreadable, compare measured rails with rated values and confirm interchangeability. Read the full code on the module label, as neighbouring variants differ.
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 @acodis_lcd_datasheets_EDID. 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.