Touchscreen pages of the Samsung SM-A05 schematic, provided as a PDF of 6.27 MB. The sheet covers the touch connector pinout, touch controller power rails and the communication and interrupt lines to the processor. Technicians refer to it for unresponsive or erratic touch, checking that each supply is present at the connector and that filters and ESD parts are not shorted. Opens with any PDF viewer; verify the PCB revision of the phone first, since references may vary between board versions.
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.