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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
-32-
4.2.2 Front End Module & Mobile Switch
Mode
850/900 TX
850/900 RX
1800/1900 TX
1800/1900 RX
ANT_SW1
H
L
L
H
ANT_SW2
H
L
H
L
U400
FL400
SW400
X101
U102
< M/S & FEM Placement>
< M/S & FEM Circuit>
< FEM LOGIC TABLE>
TP 1
TP 2
< LOW BAND>
< HIGH BAND>
TX
RX
RX
TX
1000p
C431
L405
47nH
ANT403
C433
1000p
V_EXTH
C432
1000p
ANT401
ANT402
L412
1.8nH
0
R401
SW400
GRS300-2S-H36-E3000
ANT
G1
G2
RF
DNI
C424
ANT400
C404
1.2p
C425
100p
L402
2.2nH
21
VDD
DNI
C411
18
GND7
22
GND8
GSM1800_1900_TX
15
GSM1800_RX1
3
4
GSM1800_RX2
GSM1900_RX1
1
2
GSM1900_RX2
17
GSM850_900_TX
GSM850_RX1
7
8
GSM850_RX2
GSM900_RX1
5
6
GSM900_RX2
23
NC1
24
NC2
19
VC1
VC2
20
FL400
LMSP43QC-789TEMP
11
ANT
GND1
9
GND2
10
12
GND3
GND4
13
14
GND5
GND6
16
ANT_SW1
ANT_SW2
TP1
TP2