Datasheet for the PG128112ERF-XNN-H graphic LCD module, a Powertip part whose number suggests a 128 x 112 dot resolution. The 294 KB PDF should include dimensions, pinout, electrical and optical characteristics, and interface timing. The suffix letters describe the panel and backlight configuration, and the XNN code may mean a variant without backlight, so confirm it against the module label. Use the sheet to trace display connector signals, check supply voltages or find a drop-in replacement when the screen shows no image or faded segments.
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.