Samsung Galaxy A02s (SM-A02S) schematic page in PDF covering the LCD backlight circuit, 3.69 MB. It shows the backlight driver, boost coil, diode and the lines running to the display connector. Technicians use it when the picture is faintly visible but the screen stays dark, measuring the boost output and checking the inductor and diode. Pair it with the touchscreen and display pages from the same A02s set, and confirm the board variant matches before replacing parts.
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.