4. TROUBLE SHOOTING
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Copyright © 01 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
C137
DNI
U102
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VBP
ISO
VMODE
GND
VEN
CPL
59
1
C
n6.
5
C180
1p
L129
3.3n
FL1008
1950MHz,2140MHz
7
5
8
4
9
2
3
1
6
ANT
RX
TX
GND1
GND6
GND2
GND5
GND3
GND4
C144
3.3p
2.2u
C187
C181
3.3n
C199
22n
51
1
L
n2
1950MHz
FL102
5
3
2
4
1
IN
OUT
G1
G2
G3
C138
6.8n
C174
2.2u
FL2
7
5
8
4
9
2
3
1
6
ANT
RX1
TX
GND1
GND5
GND2
RX2
GND3
GND4
C197
DNI
330p
C172
680p
C186
FL104
836.5MHz
5
3
2
4
1
IN
OUT
G1
G2
G3
C198
DNI
87
1
C
n7.
2
DNI
L116
110
R123
110
R124
97
01
C
n8.
6
22
1
L
p7
2
C183
1p
L1031
DNI
L112
3.3p
09
01
C
p8
1
C196
15n
L1035
1.5n
C182
3.9n
L114
3.3p
100p
C184
L121
3n
L1021
15n
U103
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VBP
ISO
VMODE
GND
VEN
CPL
C121
DNI
C188
680p
VBAT
100p
C185
C175
330p
VBAT
R122
51
33p
C194
9.
94
62
1
R
100p
C201
100p
C200
DNI
C1081
GND
PA_ON0
PA_R0
PA_R0
RX_WCDMA_HB
PDET_IN
RX_WCDMA_850_P
RX_WCDMA_850_M
WCDMA_850_TX_OUT
WCDMA_2100_TX_OUT
WCDMA_2100_RTX
WCDMA_850_RTX
PA_ON1
8dB
Close to pin1
Band I
Band V
TP2
R101
0.75p
FL1001
10
5
8
3
7
2
6
4
9
1
1842_5/1960MHz
1960MHz_2
GND5
1842_5MHz_1
GND1
1842_5MHz_2
GND2
1960MHz_1
GND3
GND4
C118
100p
11
1
C
n2.
1
R100
68n
C1043
22u
C1044
47p
SW100
43
2
1
ANT
COMMON
G3
G4
12
01
C
n2.
2
U101
24
17
18
19
13
12
6
5
3
1
2
16
20
51
41
4
22
11
10
9
8
7
23
21
TX_EN
PGND1
GND
GND2
GND3
RX1
RX2
VRAMP
5
D
N
G
T
N
A
6
D
N
G
GPCTRL0
GND7
GND8
GND1
BL
_
NI
F
R
B
H_
NI
F
R
GND4
TRX1
TRX2
GPCTRL1
VBATT
GPCTRL2
PGND2
FL1002
10532
6
4
7
8
9
1 IN
O1_1
O1_2
O2_1
GND
O2_2
1
G_
C
2
G_
C
3
G_
C
4
G_
C
L1012
9.1n
L1006
3.3n
p0
01
54
01
C
p0
01
74
01
C
p0
01
84
01
C
p0
01
15
01
C
C109
100p
ANT100
1
C1091
56p
2.2K
R107
C1092
22p
02
1
C
p0
01
ANT105
1
30
01
C
I
N
D
51
1
C
I
N
D
L102
100p
14
01
C
n8.
1
39p
C1024
03
1
21
1
R
47
R113
03
1
41
1
R
VBAT
75
R116
C116
DNI
19
51
1
R
19
71
1
R
GSM_PA_RAMP
ANT_SEL2
ANT_SEL1
GSM_TX
DCS_PCS_TX
ANT_SEL3
WCDMA_2100_RTX
WCDMA_850_RTX
ANT_SEL0
2mm
11dB
7dB
80
61
PCS(1850-1910 MHz)
DCS(1710-1785 MHz)
GSM850(824-849MHz)
GSM900(880-915MHz)
TP1
TP3