Network and cellular RF section of the Samsung Galaxy A12 (SM-A12) schematic, 3.40 MB PDF. It documents the transceiver, power amplifiers, antenna switches and RF paths, the area to study for no-service, weak signal or baseband faults. Following the RF supply lines and antenna connections helps isolate a damaged amplifier or a lifted coaxial connector. The name does not specify the regional model suffix or the board revision, and RF layouts can differ between A12 variants, so check your board carefully. Opens in any PDF reader.
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