Schematic section for the Samsung SM-A02S smartphone covering the handsfree audio circuit, supplied as a 1.79 MB PDF. It shows the earpiece, speaker and headset paths with their component references, which helps when a phone has no sound in calls, a dead loudspeaker or a headset that is not detected. Open it in any PDF reader and trace the audio lines from the codec through filters and connectors, measuring continuity and resistance against the drawing. Confirm the handset variant before relying on part 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 @phoneSchematics. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.