Datasheet in PDF for the PC1602LRU-ISO-E display module, a two-row, sixteen-column character LCD per the 1602 numbering. ISO-E is the variant code separating it from other LRU parts. Typical content covers pin assignment, power supply and contrast drive specifications, backlight ratings, timing charts and mechanical drawings. Repair use includes verifying supply pins on a failed screen, checking the backlight LED circuit and confirming fit and pinout of a candidate replacement against this exact code.
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.