LG -V909DW Service Manual page 78

ANT_SEL0
ANT_SEL1
ANT_SEL2
ANT_SEL3
+2.85V_VDD_RF_SW
C230 C231
1u 33p
SW200
R129
C220 C221
DNI DNI
4.7kohm
C239
DNI
LGE Internal Use Only
R206 1K
R207 1K
R208 1K
R209 1K
L203
15n
12
VC4
13
VDD
14
GND1
15
ANT GSM1800/1900RX2
16
GND3 GSM1800/1900RX1
17
UMTS1
L202
4.7K
100n
FIG 25 Schematic of the GSM Rx Path
+2.85V_MDM_SDCC1
R128
120K
C900
39p
MS_DET
C901
39p
TP1
FIG 24 Schematic of the FEM
5
GSM850RX1
4
GND2
3
2
1
TRX_W2100
UMTS3
TRX_AWS
TRX_W900
- 78 -
4. TROUBLE SHOOTING
C232 56p
TP2
TP2
L204
L205
DNI
7.5n
C233 56p
C242 8p
TP3
TP3
L210 L211
1.8n DNI
C243 8p
Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
RX_G850_M
GSM 850
RX_G850_P
RX_PCS_DCS_M
DCS/PCS
RX_PCS_DCS_P