LG LG-V909DW - Checking Fem Block

4. TROUBLE SHOOTING
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Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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4.3.3 Checking FEM Block
This block is to check RF path by verification RF path switching part.
FIG 8 FEM Block
FIG 9 Schematic of the FEM(Front End Module)
{wXG
{w[SGZSGY
{wX
{wY
{wZ
{w[
{w\G
DNI
L204
K002
721R
8pC242
206LF
12 02 91
12
81
01
16
13
8 9 7 6
11
5
414
315
2
117
UMTS1
UMTS3
GSM1800/1900RX1
ANT GSM1800/1900RX2
GND1 GND2
GSM850RX1
3CV 2XR058MSG 1XT0091/0081MSG 1CV
XT009/058MSG
VDD
GND3
2CV
4DNG
VC4
2STMU
5DNG
DNGP
p081
812C
56pC232
1.8n
L210
SW201
G1
ANTG2
DNI
L211
56pC233
8pC243
7.5n
L205
1KR206
DNI
C221
DNI
C220
p001
712C
SW200
4 2 1 3
1G
A C
2G
33p
C231
15n
L203
1KR207
+2.85V_VDD_RF_SW
100n
L202
4.7K
R129
+2.85V_MDM_SDCC1
1u
C230
K7.4
621R
1KR208
1KR209
39p
C900
DNI
C239
39p
C901
120K
R128
ANT_SEL0
ANT_SEL1
ANT_SEL2
RX_PCS_DCS_M
TRX_W2100
RX_PCS_DCS_P
TRX_W900
RX_G850_M
RX_G850_P
ANT_SEL3
MS_DET
TRX_AWS
4.7kohm
TP1
TP2
TP3
TP4