Charging and data section of the Samsung SM-A20S schematic, a 4.63 MB PDF. It traces the USB connector, charging IC, VBUS path, data lines and the protection components between the port and the system. This sheet helps when the phone does not charge, charges slowly, is not recognised by a computer, or shorts the charger. Measure the VBUS line to ground, inspect overvoltage protection parts and follow the data lines with the diagram open in any PDF viewer, after confirming the SM-A20S model.
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.