Samsung SM-F700U schematic diagrams, about 2.06 MB in a ZIP archive, for the US version of the original Galaxy Z Flip. The name gives no board revision. Use the pages to trace battery and USB charging circuits, PMIC output rails, display and sub-board flex connections and component references when repairing a phone that will not power on or charge. Check that the device and PCB are labelled F700U, since the SM-F700F international model may differ.
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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