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CHAPTER 1 MAINBOARD OPERATING PRINCIPLE
MOBILE PHONE FUNCTIONAL BLOCK DIAGRAM INTRODUCTION
EXTERNAL
CHARGER
Interface
VBAT
CHARGE
PWR KEY
USIM
LCD BACK
LIGHT
SPK PA
VIBRATOR
SIDE KEY
TF CARD
KEY BACK
LIGHT
CAMERA
LCD
TP
USB
G SENSOR
CAM
CTP
MT6572 is baseband signal processing chip, which in charge of IMAGE, VIDEO,
AUDIO, RF INTERFACES, CONECTIVITY signal input and output dispose. Baseband
Interface section provides SIDEKEY、 LCD、SD card、Bluetooth、CAMERA、 TP
connector and so on.
MT6323 provide frequency including PA,VBAT input switch, output DC-DC,LDO，
2013-10-18
YU220 service manualV1.0
MT6323A
Power
MT6572
IIC Bus
UART1
UART2
Huawei secrets, no dispersion without permission
32.768
KHz
MIC
HAEDSET
RCVER
Interface
Power
MT6166A
Power
IQ & control
IQ & control
WIFI BT FM GPS
NAND+DDR1
Main Antenna
Connector
Antenna switch
Matching
Matching
SAW
Matching
GPA
GSM
Matching
UMTS
MT6627N
Power
26MHz
Matching
WIFI/BT
Antenna
BPI control
Matching
Duplexer
Matching
WPA
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