Audio section of the Samsung SM-A11 schematic covering the microphones, loudspeaker and earpiece, as a PDF of 4.33 MB. The pages show the audio codec connections, microphone bias supply, speaker amplifier output and the related filter components. Use it for no sound, distorted calls or a dead microphone, checking bias voltage, amplifier supply and continuity to the transducer contacts. Opens with any PDF viewer; make sure the board revision on the PCB matches before trusting component references.
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.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.