PDF for the bq24780S, a Texas Instruments battery charge controller used in notebooks; though tagged as a schematic, the 1.03 MB file is most likely the datasheet. It documents pin functions, SMBus registers, typical application circuit and protection behaviour. Repair technicians use it to check input current sensing, ACDRV and BATDRV gate drive, and charger communication when a laptop will not charge or runs only on adapter. Confirm the chip marking on the board before relying on pin numbers.
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 @schematiclaptopramkushwaha. 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.