Indexed as a schematic, this 115 KB PDF is named 62l256 and gives no laptop model, board number or revision. It parallels the 62v256 file in this collection, with one letter different, which usually marks a variant within one chip family, though the name does not explain it. Expect pinout, timing or electrical data rather than a board circuit. Any PDF viewer opens it. Confirm the exact marking on the chip before relying on its voltage or pin information during repair.
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.