Fingerprint sensor section of the Samsung Galaxy A12 (SM-A12) schematic, 3.40 MB PDF. It shows the sensor connector, supply rails and interface lines, the reference for a sensor that is not detected, fails enrolment or stops after a side-key or flex repair. Checking the supply and interface lines for continuity and shorts helps separate a faulty flex from a board fault. The name does not state the variant suffix or board revision, so match designators against your mainboard before replacing parts. Opens in any PDF reader.
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.