4. TROUBLE SHOOTING
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Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
FL1102
897.5 MHz,942.5 MHz
9
5
8
4
7
2
3
6
1
RX1
ANT
TX
GND1
GND4
GND2
RX2
GND3
GND6
C1171
3p
C1168
1.5n
C1167
3p
C1176
1.5p
C1191
DNI
FL1104
1950MHz, 2140MHz
9
5
8
4
7
2
3
6
1
RX
ANT
TX
GND1
GND4
GND2
GND5
GND3
GND6
C1182
12n
C1170
DNI
L1116
DNI
L1122
3.9n
12
11
R
00
1
00
1
22
11
R
68
R1119
C1180
3.3p
12n
L1114
L1113
DNI
C1190
33p
1.5n
L1130
33p
C1189
L1117
2.2n
2.2n
L1124
C1183
0.5p
DNI
C1175
L1126
DNI
RX_WCDMA_2100
PDET_IN
RX_WCDMA_850_900_P
RX_WCDMA_850_900_M
RX_WCDMA_1900
WCDMA_1900_2100_RTX
WCDMA_850_900_RTX
Band 8
W2100 : C1213->33pF, C1214->DNI
W1900 : C1213->DNI, C1214->33pF
about 9.5 dB
Band I
TP2
C1163
3.9p
L1112
2.2n
K1
61
11
R
85
11
C
u1.
0
p0
01
95
11
C
3.9p
C1160
1.2n
L1115
DNI
C1161
C1169
3.9p
VREG_SMPS_2.1V
33p
C1162
2140MHz
FL1101
5
2
4
3
1
IN
OUT
_OUT
G1 G3
L1110
2n
L1111
1.2n
WB1900/2100_MIX_INM
WB1900/2100_MIX_INP
RX_WCDMA_1900_2100_LNA_OUT
0603
W1900 RX(1930 - 1990 MHz)
W2100 RX(2110 - 2170 MHz)
WCDMA RX 1900/ 2100 LNA Circuit
TP2
TP3
TP3
Bias
TP4
TP5