LG -E450 Service Manual page 84

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