A schematic diagram (board LA-H082P). Shared as “EL4C4 FL454 LA-H082P Rev1.0 PDF .pdf” — a .pdf file, 5.00 MB.
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 @alischematics. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.