4. TROUBLE SHOOTING
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Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
SW1002
G1
ANT
G2
L1004
100n
R1001
DNI
DNI
C1001
DNI
L1003
R1004
91
L100
2
1.5n
VBAT
C1028
39p
R1002
2.2K
C1020
100p
100p
C1019
C1018
100p
100p
C1017
SW1001
4
2
1
3
G1
A
C
G2
U1002
24
17
18
19
13
12
6
5
3
1
2
16
20
15
14
4
22
11
10
9
8
7
23
21
TX_EN
PGND1
GND
GND2
GND3
RX1
RX2
VRAMP
GND5
AN
T
GND6
GPCTRL0
GND7
GND8
GND1
RFIN_L
B
RFIN_HB
GND4
TRX1
TRX2
GPCTRL1
VBATT
GPCTRL2
PGND2
47p
C1014
C1104
100p
L1001
1n
C1013
22u
GSM_PA_RAMP
ANT_SEL0
ANT_SEL3
GSM_TX
ANT_SEL1
ANT_SEL2
GSM850(824-849MHz)
1608
2mm
TP1
L1034
10n
DNI
L1016
10n
L1031
C1078
8.2n
U1004
6
7
4
8
3
5
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VEN
NC
ISO
VMODE
GND
CPL
L1026
3.3n
L1027
1.8n
FL1008
7
5
9
4
2
3
8
1
6
ANT
RX1
RX2
TX
GND1
GND2
GND5
GND3
GND4
C1038
100p
FL1004
1950MHz,2140MHz
7
5
8
4
9
2
3
1
6
ANT
RX
TX
GND1
GND6
GND2
GND5
GND3
GND4
C1080
DNI
C1074
2.7p
L1028
1n
C1087
12n
DNI
L1032
R1023
180
R1024
180
L1044
22n
L1041
39p
L1045
6.2n
L1046
2.7p
C1096
2.7n
C1097
18n
R1022
43
L1024
1n
C1065
6.8p
1n
C1070
R1021
49.9
C1067
10u
C1068
33p
U1003
7
4
3
5
2
6
1
RFIN
RFOUT
EN
RREF
GS
VCC
PGND
C1084
10u
C1063
10n
R1017
27K
C1082
100p
VREG_TCXO_2.85V
C1059
10p
L1020
2n
100p
C1083
C1085
33p
C1099
100p
100p
C1100
C1086
1n
U1005
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VMODE_1
CPL_IN
VMODE_0
GND
VEN
CPL_OUT
C1062
100p
C1058
DNI
RX_WCDMA_900_M
RX_WCDMA_900_P
PDET_IN
WCDMA_LB_RTX
WCDMA_HB_RTX
EXT_LNA_EN
RX_WCDMA_1900
RX_WCDMA_2100
SDPY0004701
ACMD-7407
BC 2
SDMY0003001
B7697
BC 1
[Duplexer]
BC 5
SDDY0005101
B7671
B7953
SDMY0002801
BC 8
W900
6dB Atten.
W900 Tx (880-915MHz)
W2100 Tx (1920-1980MHz)
TP2
TP3