Top-layer component location map for the Compal LA-F391P motherboard, a small 148 KB PDF. It belongs with the full schematic and the bottom-side view for the same board, which appears to be the BRMLK12U design. Technicians use such a layout to find where a designator from the schematic physically sits, reach test points and identify parts near a burnt or shorted area. Any PDF viewer opens it. Check the LA-F391P label printed on your PCB, as placement differs between board 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 @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.