Headset or hands-free section of the Samsung Galaxy A30s (SM-A30S) schematic, a 2.31 MB PDF, somewhat smaller than the other pages in the set. It shows the wired headset jack wiring, detection line and the audio and microphone signals to the codec. Use it when earphones are not recognised, the phone is stuck in headset mode or headset audio is missing, to trace the jack contacts and check detection components. Any PDF reader opens it; verify against your board revision.
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.