Circuit Diagram - LG lg530g Service Manual

7. CIRCUIT DIAGRAM

GSM with FEM
L101 DNI
C102
100p
L103 22n
33p
SW101 C104
2
ANT COMMON
1 GND
G3 G4
L106
3 4
DNI
12
ANT
L107 13
GND4
VREG_MSMP_2.6V
14
VDD
15n
15
VC3
C106 C107 16
VC2
1u 33p 17
VC1
ANT_SEL[2]
R100 1K
TX_HB
ANT_SEL[1]
R101 1K
ANT_SEL[0]
R102 1K
WCDMA
WCDMA_850
C120
WCDMA_850
C125
DNI
WCDMA 1900
WCDMA_1900 C144
C149
DNI
LGE Internal Use Only
4.7n
L100
DNI
C100
C101 4.7n
L102 4.7n
WCDMA_1900
C103 8.2p
WCDMA_850
L104
DNI
L105 DNI
FL100
C105 8.2p
5
GSM850RX1
4
GSM900RX2
3
GSM900RX1
2
GSM1800/1900RX2
1
GSM1800/1900RX1
C111
TX_HB
C112
TX_LB
DNI
L108
TX_LB
C116
12n
FL101
3.9n
6 3
ANT TX_IN
L110 33p
W850/GSM850_RX_P
1
RX_OUT1
L111
8
RX_OUT2
8.2n 2
GND1
4 7 C131 L112
GND2 GND4
5 9 0.5p 8.2n
GND3 GND5
836.5 MHz,881.5 MHz
L115 33p W850/GSM850_RX_M
C136 10p C137 100p
W1900_RX_P
FL104
L119 L120
33K
3.9n
1
C146 100p
100p RX1 C145 10p W1900_RX_M
6 8
ANT RX2
L121
3
TX 1
C147
2 2 1.5n
GND1
4 7
8.2n
GND2 GND4
C150
5 9 DNI
GND3 GND6
0.75p L122
1880 MHz,1960 MHz
FL102
W2100 B7696
W1900 B7955
GSM900_RX_M
GSM900_RX_P
DCS/PCS_RX_P
DCS/PCS_RX_M
+VPWR
1.2n C108 C109
C110
1n 12p 22u
U100
17
C113
PGND
16 1
DNI HB_RFOUT HB_RFIN
15 2 GSM_PA_BAND
GND6 BAND_SEL
14 3 GSM_PA_EN
GND5 TXEN
13 4
GND7 VBATT
12 5 GSM_PA_RAMP
GND4 VRAMP
11 6 R1062.2K
GND3 NC
10 7
C115
6p GND2 GND1
9 8
LB_RFOUT LB_RFIN
33p
For Attenuator
C117
DNI
C151 100p
R107100p
R109
R108
DNI
DNI
L109 10p
C124
C123
C126 C127
100n
82p
6.8n
DNI
14 1
RFOUT_LB RFIN_LB
13 2
GND4 VMODE0
12 3
VCC2 VMODE1
U101
11 4
GND2 VCC1
10 5
RFOUT_HB VEN_LB
9 6
GND1 VEN_HB
8 7
CPL_OUT RFIN_HB
15
GND5
about 6dB
R110
PWR_DET
36
- 132 -
ANTENNA SWITCH MODULE LOGIC
ANT_SEL0
GSM850/EGSM TX 1
DCS/PCS TX 1
WB850 1
WB1900 0
GSM850 RX 1
EGSM RX 0
DCS RX 1
PCS RX 0
RFMD(2G) PAM LOGIC
BAND SEL
STANDBY X
TXLB 0
TXHB 1
About 2dB
R103 C114 33p
C119 33p GSM_HB_TX
12
L123
R104 R105
8.2n
430 430
C152 3.9p L126 8.2n
C154 100p GSM_LB_TX
L124
L125 C153
5.6n 8.2n
8.2p
3G PA Modes of Operation
Power Setting Band VEN_HB
Low Power Mode(Pout ¡Â 7dBm) ¥± High
Medium Power Mode(Pout = 7dBm to 18dBm) ¥± High
High Power Mode(Pout = 18dBm to Pmax) ¥± High
Optional Lower Vcc(Pout ¡Â 7dBm) ¥± High
Low Power Mode(Pout ¡Â 7dBm) ¥´ Low
Medium Power Mode(Pout = 7dBm to 18dBm) ¥´ Low
High Power Mode(Pout = 18dBm to Pmax) ¥´ Low
Optional Lower Vcc(Pout ¡Â 7dBm) ¥´ Low
+VPWR
836.5MHz
1608
C122 FL102
10u C128 1n C129
3.9p
4 1
OUT IN
G3 G2 G1
10n 5 3 2
L113 C132
L114
DNI
DNI
1p
C133
PA_R0
PA_R1
WCDMA_PA_ON2 FL103
WCDMA_PA_ON1
C134 1.2n
L116 100p
4 1
OUT IN
G3 G2 G1
5 3 2 0.5p
L117 L118
C142
C143 DNI
0.5p
8.2n
7. CIRCUIT DIAGRAM
ANT_SEL1 ANT_SEL2
1 0
0 0
0 1
1 1
0 1
0 1
1 1
0 1
TX_EN Vramp
0 X
1 >0.25
1 >0.25
VEN_LB VMODE0 VMODE1 Vcc
Low High High On
Low High Low On
Low Low Low On
Low Low Low TBD
High High High On
High High Low On
High Low Low On
High Low Low TBD
W850_TX_OUT
W1900_TX_OUT
<PA_ENABLE Signal>
W1900 : WCDMA_PA_ON1
W850 : WCDMA_PA_ON2
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Only for training and service purposes