Samsung SM-A11 schematic section for the headset (handsfree) jack, provided as a 4.32 MB PDF. It traces the audio jack contacts, detect line, headset microphone bias and the left and right output paths back to the codec. Use it when headphones are not detected, the phone is stuck in headset mode or the headset mic fails, checking detect voltage and filter parts. Opens with any PDF reader; confirm the board revision on your unit before trusting part numbers and 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.