Samsung NP550P5 schematic, project name McLaren 15, delivered as a PDF with BA41 marked in the name. Samsung uses BA41 numbers for its mainboard part numbers, though the full number is not given here. The diagram helps trace power rails, follow charging and power-on logic, and locate components on shorted lines. It opens in any PDF reader. Compare the board project name and revision printed on the PCB with the drawing before relying on its values or test points.
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 @schematicslaptop. 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.