Samsung SM-A10 audio schematic covering microphone, speaker and earpiece, provided as a 2.25 MB PDF. It shows the microphone bias and signal lines, the speaker amplifier output and the earpiece path with its filter parts. Technicians consult it when calls have no audio, the microphone is silent or the loudspeaker distorts, measuring along each path to find the open or shorted part. Open with any PDF reader. Verify the phone is an SM-A10 before working from these pages.
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.