LG -A258 Service Manual page 79

CIRCUIT
RF SUPPLIES (CLEAN GND)
VDDTRX VDDRF2
PIN_B16 PIN_G15
TP8 TP10
C113 C114 C115
1u 18p 220n
1V8_VDD
L100 3.3u
22u
C126
VBAT
1V8_VDD
VBAT
C128 10u
LGE Internal Use Only
RF SUPPLIES (DIRTY GND)
VBAT
VBAT_RF2 VDDXO
PIN_G16 PIN_E13
FB100
TP3
75
C116
C121 C122 4.7n
470n
1u
(10V)
ABB SUPPLIES
VBATSP
VDD1V8CP
Speaker Supply
PIN P18
1V8_VDD
(LS : not used)
PIN P16
TP5
C101
0.1u
RF_TX_RAMP
1V8_VDD 1V8_VDD
1V8_VDD 1V8_VDD VPMU VCORE 1V8_VDD 1V8_VDD
VRTC
KB100
Figure 4.5.3 power block of LG-A258
VRF1
VDDTDC VDDMS
PIN_B14 PIN_H15 PIN_H12
Seperate and shield
TP9 TP
TP6
C117 C118
C119
47n 47n
1u
PMU SUPPLIES
VBAT_PMU
VBAT VPMU VAUX VMMC
PIN N10 PIN P12 PIN P10
TP11 TP7 TP13 TP1 TP4
C104 C105 C106
2.2u 0.1u 470n
(10V)
VDDMS VDDXO VDDTDC VBAT_RF2 VAUX VMMC VUSB
TP1
R125
PWRON
100
R126
ZD100
100K
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4. TROUBLE SHOOTING
DBB SUPPLIES
VDD_IO1 VDD_IO2
1V8_VDD
1V8_VDD 1V8_VDD
R100
PIN G11 PIN K9
0
C110 C111
1u 0.1u
VUSB VCORE
PIN L9 PIN M11 PIN K10
C107 C108 C109
470n 0.1u 220n
VRTC
R102
C148
470
R103
0.1u
3.9K
3
Q100 2
1
VDDRF2 VRF1 VBAT
R106
5.6K
Only for training and service purposes
VDD_EBU
1V8_VDD
PIN F6,P6
C112
0.1u
R105
VBUS
100K
(1%)