LG 410G Service Manual page 35

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