WiFi, Bluetooth and GPS circuit schematic for the Samsung SM-A03, packaged as a 2.80 MB PDF. It covers the wireless connectivity section, including the RF paths, antenna connections and supporting power rails, useful when WiFi will not switch on, Bluetooth fails to pair or GPS cannot get a fix. Trace antenna lines and matching components, check supplies to the connectivity chip and inspect for damaged RF parts. Any PDF reader opens it; make sure the handset is the SM-A03 and not a similar variant before trusting the values.
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.