Service schematic in PDF form for the Acer Aspire 7520, the AMD-platform version of that model as stated in the name. The 2.30 MB document can be read in any PDF viewer and is used to trace power rails, follow signal paths between the chipset, CPU and peripherals, and identify component values around a faulty circuit. The name gives no board number, so compare the project code on the schematic title block with the label on your mainboard before relying on it for measurements or part replacement.
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 @abgm_manutencao_esquemas. Enginerys does not host this file.
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How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.