Samsung schematic in PDF covering the NP X-Series notebook line, as the file name puts it without naming a specific model or board number. At 2.56 MB it should hold the full circuit diagram set with power sequencing, rails and signal paths. Technicians open it in any PDF reader and search net names to trace a dead rail, follow a short or find which component feeds a given connector. Since the exact X model is not stated, compare the BA41 board number printed on your PCB with the title block before relying on values.
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.