Schematic in PDF form for the Compal LA-N381P motherboard, revision 1.0, with JDB41 as the project code. The file appears to be a duplicate copy of the same 3.79 MB document. Compal schematics cover power sequencing, rail generation, charger, CPU and memory sections, and are used to trace signals, find pull-ups, and work out expected voltages during fault-finding. Use it together with the matching boardview, and confirm the PCB revision first, since component values can change between versions.
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 @cynetitsolution. 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.