Component naming reference for the Samsung SM-A11 schematic set, a PDF of 4.33 MB. Based on the name it maps part designators across the board so you can relate schematic references to physical components. Technicians use such pages to locate capacitors, coils and ICs before measuring rails or replacing parts, especially when working alongside the section schematics. Open it in any PDF viewer; check that the board revision of the handset matches, since component placement can change between versions.
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 @phoneSchematics. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.