10.1 Solution Introduction................................................................................................................................................29
10.2 Baseband Subsystem ................................................................................................................................................30
10.2.1 Startup Management Circuit..................................................................................................................................30
10.2.2 Charging Management Circuit...............................................................................................................................36
10.2.3 Clock Circuit..........................................................................................................................................................41
10.2.4 Memory Circuit .....................................................................................................................................................44
10.3 RF Subsystem...........................................................................................................................................................45
10.3.2 Receive Channel ....................................................................................................................................................46
10.3.3 Transmit Channel...................................................................................................................................................50
10.3.4 GPS Channel..........................................................................................................................................................52
10.3.5 Wi-Fi Channel........................................................................................................................................................52
10.4 Peripheral Circuits ....................................................................................................................................................54
10.4.1 LCD Circuit ...........................................................................................................................................................54
10.4.2 TP Circuit...............................................................................................................................................................57
10.4.3 Front Camera Circuit .............................................................................................................................................59
10.4.4 Rear Camera Circuit ..............................................................................................................................................61
10.4.5 G-Sensor Circuit ....................................................................................................................................................63
10.4.6 3-in-1 Sensor Circuit..............................................................................................................................................65
10.4.7 Key Circuit.............................................................................................................................................................66
10.4.8 Motor Circuit .........................................................................................................................................................68
10.4.9 Receiver Circuit.....................................................................................................................................................69
10.4.10 Microphone Circuit..............................................................................................................................................71
10.4.11 Speaker Circuit.....................................................................................................................................................73
10.4.12 Headset Circuit ....................................................................................................................................................75
10.4.13 SIM Card Circuit .................................................................................................................................................78
10.4.14 microSD Card Circuit..........................................................................................................................................80
10.4.15 USB Port Circuit..................................................................................................................................................82
10.4.16 Wi-Fi Module Circuit...........................................................................................................................................84
10.4.17 Bluetooth Module Circuit....................................................................................................................................86
10.4.18 GPS Module Circuit.............................................................................................................................................87
10.4.19 FM Module Circuit..............................................................................................................................................88
11 Solder Points on the PCB and BGA Chips...........................................................................91
12 Functional Tests.........................................................................................................................93
12.1 Keys..........................................................................................................................................................................93
12.2 MMI Test ..................................................................................................................................................................94
12.3 Voice Call Test..........................................................................................................................................................96
