- 87 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
U1002
31
30
29
44
43
42
41
40
39
38
73
63
53
16
15
41
31
21
11
01
34
33
32
17
9
18
8
19
7
20
6
21
5
22
4
32
3
42
2
52
62
72
82
1
DCS_PCS_IN
11
D
N
G
01
D
N
G
9
D
N
G
8
D
N
G
GND1
7
D
N
G
GSM_IN
6
D
N
G
VAPC
GND5
VBATT
GND4
BS2
GND3
BS1
GND2
_TXEN
ANT
E
D
O
M
WCDMA3
PGND4
PGND5
PGND6
P
M
ET
4
X
R
3
X
R
2
X
R
1
X
R
WCDMA1
WCDMA2
7
D
N
G
P
8
D
N
G
P
9
D
N
G
P
PGND10
PGND11
PGND12
PGND13
PGND14
PGND15
PGND16
PGND1
PGND2
PGND3
18n
L1004
L11
DNI
33p
C1005
SW1001
4
3
2
1
ANT
COMMON
G3
G4
GND
WCDMA_2100_RTX
WCDMA_900_RTX
TP1
33p
C1087
L1030
DNI
C1929
100p
FL1005
897.5 MHz
5 3 2
4
1
IN
OUT
G1
G2
G3
L1027
3.3n
L1025
12p
51
11
R
I
N
D
36
11
R
C1153
4.7n
C1090
12p
2.7n
L1035
5.6n
L1021
C1081
DNI
87
11
R
0
18p
C1079
C1088
15p
C1086
8.2n
L1033
DNI
FL1008
7
5
8
4
9
2
3
1
6
ANT
RX
TX
GND1
GND6
GND2
GND5
GND3
GND4
U1003
16
8
7
9
6
10
5
11
4
12
3
13
2
14
1
15
PGND1
IN_BAND_VIII
OUT_BAND_VIII
VMODE_0
GND3
VMODE_1
VCC2_2
VCC2_1
GND2
VEN_BAND_VIII
OUT_BAND_I
VEN_BAND_I
GND1
IN_BAND_I
CPL_OUT
PGND2
DNI
L1020
6.8p
C1078
3.3p
C1089
5.6n
L1029
33
R1022
18
R1023
+VPWR_RF
C1075
0.001uF
10u
C1077
330p
C1076
C1083
1n
22n
L1026
C1084
5.6p
C1092
1.5n
100p
C1094
C1096
100p 100p
C1095
L1031
DNI
1950MHz
FL1006
5 2
4
1
3
G3
IN
OUT
G1
G2
L1130
27n
897.5 MHz,942.5 MHz
FL2
7
5
8
4
9
2
3
1
6
ANT
RX
TX
GND1
GND5
GND2
GND6
GND3
GND4
10n
L1022
L1120
DNI
100p
C12
100p
C13
PA_ON1
PA_ON0
PA_R0
WCDMA_2100_RTX
WCDMA_2100_TX_OUT
PDET_IN
WCDMA_900_RTX
WCDMA_900_TX_OUT
PA_R1
Band I
Band VIII
W2100
W900
Near to 12 Pin
Near to 12 Pin
Near to 4 Pin
TP2
TP2
TP3
TP3
TP4
TP4