4. TROUBLE SHOOTING
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Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TOP Side
U102
PA
TP1(RF IN)
TP2(RF OUT)
TP3
C199
0.5p
C193
2.2u
C160
2.2u
C157
0.1u
U103
PGND
11
VEN
5
RF_OUT
9
RF_IN
2
VBAT
1
VCC
10
GND
7
VMODE1
3
CPL_IN
8
VMODE0
4
CPL_OUT
6
L119
4.7n
5.6p
C161
DNI
C158
FL103
7
5
8
4
9
2
3
1
6
ANT
RX1
TX
GND1
GND5
GND2
RX2
GND3
GND4
L173
1.2n
DNI
C154
C153
5.6p
DNI
C155
C162
DNI
L120
100p
L166
8.2n
C164
4.7n
36
R109
27
R108
27
R107
C159
1n
C163
3.3p
DNI
L122
100p
L111
L169
2.4n
FL102
7
5
8
4
9
2
3
1
6
ANT
RX1
TX
GND1
GND5
GND2
RX2
GND3
GND4
2.2u
C143
C141
0.1u
49.9
R104
22n
L112
C146
33p
L172
1.2n
DNI
L113
DNI
L148
L114
100p
L116
6.2n
L115
DNI
1n
C142
U102
6
4
8
3
7
10
1
2
9
5
11
PGND
VEN
RF_OUT
RF_IN
VBAT
VCC
GND
VMODE1
CPL_IN
VMODE0
CPL_OUT
C198
0.5p
L167
22n
W850_W900_TRX
RX_W850_W900_INN
PDET
RX_W850_W900_INP
VBATT
VBATT
PA_ON_W850_W900
RX_W1900_W2100_INP
W1900_2100_TRX
RX_W1900_W2100_INN
PA_R1
PA_R1
PA_R0
PA_R0
+3V4_VWPAM_MTK
+3V4_VWPAM_MTK
W1900_2100_TX_IN
W850_W900_TX_IN
PA_ON_W1900_2100
B1
B1
W850_W900 TX
B8
B8
W1900_W2100 TX
REV.C
TP3
TP2(RF OUT)
TP1(RF IN)