LG -A230 Service Manual page 71

CIRCUIT
RF SUPPLIES (CLEAN GND)
VDDTRX VDDRF2
PIN_B16 PIN_G15
C109 C110 C111
1u 18p 220n
ABB SUPPLIES
VDD1V8CP
VDD_IO_1V8
PIN P16
C100
0.1u
LGE Internal Use Only
RF SUPPLIES (DIRTY GND)
VBAT
VBAT_RF2 VDDXO
PIN_G16 PIN_E13
FB100
75
C112
C119
C120
4.7n
1u
470n
(10V)
VBAT_PMU
VBATSP
Speaker Supply
VBAT
VBAT
PIN N10
PIN P18
C102
C101
2.2u
2.2u
(10V)
(10V)
Figure 4.5.4 power block of LG-A230
VDD_IO_1V8
VDDTDC VDDMS VRF1
PIN_B14 PIN_H15 PIN_H12
Seperate and shield
C113 C114 C115
47n 47n 1u
PMU SUPPLIES
VPMU_1V3 VAUX_2V85 VMMC_2V85 VUSB_3V1 VCORE_1V2
PIN P12 PIN P10 PIN L9 PIN M11
C103 C104 C105 C106
0.1u 470n 470n 0.1u
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4. TROUBLE SHOOTING
DBB SUPPLIES
VDD_IO1 VDD_IO2
VDD_IO_1V8 VDD_IO_1V8
R100
0
PIN G11 PIN K9
C116 C117
1u 0.1u
BACK UP Capacitor
VRTC
PIN K10
PIN L12
C107 C149
C108
220n 0.1u
10u
NEAR DBB
Only for training and service purposes
VDD_EBU
VDD_IO_1V8
PIN F6,P6
C118
0.1u