A 90.1 KB PDF labelled 24C02 with a _3 suffix, likely one of several copies of a datasheet for this 2 Kbit (256-byte) I2C EEPROM. No manufacturer, device or board is named. The document provides pin assignment, write-protect behaviour, page size and timing figures that matter when reading or programming the chip. Such parts store EDID and configuration data in many products. Check the marking on the package against the sheet, and make a backup of the original data before reprogramming.
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.