Blu Life Play X, Service Manual

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CONTENT
1 OUTLINE ................................................................................................................................................. 3
1.1 MOBILE PHONE INTRODUCTION..................................................................................................... 3
1.2 M
OTHERBOARD
C
OMPONENTS
D
ISTRIBUTION
........................................................................................... 6
2 SIGNAL FLOW AND FAULT ANALYSIS ...................................................................................................... 6
2.1 RF P
ART
............................................................................................................................................ 6
2.1.1 Block Diagram of the RF Section ............................................................................................. 6
2.1.2 Signal Flow OF the RF Transmitting Part.................................................................................. 6
2.1.2.1 Receiving and Transmit Path ............................................................................................ 6
2.1.2.2 Maintenance Procedures of the Transmitting Part .......................................................... 8
2.1.3 Signal Flow of the Receiving Part ............................................................................................ 9
2.1.3.1 Receiving Part Components ............................................................................................. 9
2.1.3.2 Maintenance Procedures of the Receiving Part ........................................................ 10
2.2 B
ASEBAND
P
ART
................................................................................................................................ 11
2.2.1 Block Diagram of the Baseband Part ..................................................................................... 11
2.2.2 Power Management Part ...................................................................................................... 12
2.2.2.1 The Whole Power Supply System ................................................................................... 12
2.2.3 Audio Part .............................................................................................................................. 14
2.2.3.1 Audio CODEC Circuit ...................................................................................................... 14
2.2.3.2 MIC, RECEIVER LOOP ...................................................................................................... 15
2.2.3.3 HEADSET LOOP ............................................................................................................... 16
2.2.4 BASEBAND FAUIT ISSUES ....................................................................................................... 17
2.2.4.1 Analysis of the Keyboard Fault ....................................................................................... 18
2.2.4.2 Analysis of the Display Module Circle ............................................................................ 18
2.2.4.3 FM Module ..................................................................................................................... 19
2.2.4.4 Camera Module.............................................................................................................. 19
2.2.4.5 IO Interface .................................................................................................................... 20
2.2.4.6 SIM Card
Circuit
............................................................................................................. 21
2.2.4.7 T-FLASH Card
Circuit
..................................................................................................... 21
2.2.4.8 BT
Circuit
....................................................................................................................... 22
2.2.4.9 WIFI
Circuit
.................................................................................................................... 23
2.2.4.10 GPS
Circuit
................................................................................................................... 24
2.2.4.11 M-sensor
Circuit
.......................................................................................................... 24
2.2.4.12 G-sensor
Circuit
........................................................................................................... 25
2.2.4.13 IR-sensor
Circuit
.......................................................................................................... 25