Touchscreen section of the Samsung Galaxy A02s (SM-A02S) schematic, supplied as a PDF of 3.70 MB. It shows how the digitizer connects to the main board, including the connector pinout, I2C lines, interrupt and reset signals and supply rails. Technicians use this page to diagnose unresponsive or ghost touch after a display swap, measuring each line at the connector. Pair it with the LCD pages from the same set and verify the board matches the A02s variant on your bench.
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.