PDF datasheet for the PC2002AR-BHO-J display module, a 2002-class part, which by common convention is a 20 characters by 2 lines LCD. The AR series letters and BHO-J suffix set it apart from the LRS and LRU versions, so options and ratings may differ. Expect pinout tables, supply and backlight specifications, interface timing and outline dimensions. Use it to check signal and power pins on a failing panel and to confirm any replacement matches before soldering it in.
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.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.