PDF of 2.02 MB catalogued as a schematic, but the name sluuba6 says nothing about the device. The SLUU prefix is the style Texas Instruments uses for user guides, often for evaluation modules that include schematics and layouts, though the exact subject is not stated here. Open it in a PDF reader to identify the part or board covered. Such documents give reference circuits, pinouts and component values that can help when repairing power or charger circuits built around the same chip.
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 @one5technology. 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.