Schematic for a Philco notebook board identified as B1XIEXX, version 1.0, with a date code of 19 December 2009 in the name. The 681 KB PDF is fairly compact, so check that all the sheets you need, such as power and charging, are present. Philco machines were sold in Brazil and often used boards from outside ODMs, so the PCB marking is the reliable identifier. Technicians use such drawings to trace voltage rails, find component values and confirm connector pinouts. Make sure your board shows the same code and version.
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 @afsschematicfree. 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.