LG -E435 Service Manual page 56

4.6.4 Checking RF Rx Block
REV_1.1
SW1000
C1001 100p
ANT
1
G3
C1003
L1037
3
0.5p
27n
1
GND1
2
GND2
3
GND3
4
GND4
5
GND5
6
U1001
GND6
7
GND7
8
GND8
29
PGND1
30
PGND2
31
PGND3
32
PGND4
33
PGND5
34
PGND6
LGE Internal Use Only
C1002 6.8p
2
COMMON
G4
L1001
C1005
4
15n
100n
W850_W900_RTX
W1900_W2100_RTX
C1022 1.2n
44
PGND16
43
PGND15
42
PGND14
41
PGND13
22
GND10
21
TRX3
20
TRX2
19
TRX1
18
VRAMP
17
TXEN
16
MODE
15
GND9
C1046
100p
40
PGND12
39
PGND11
38
PGND10
Schematic of GSM/DCS/PCS Rx Block
TP2
TP1
RX_PCS_P
1
GSM1800/1900_IN GSM1900_Bal_OUT2
2
GND1 GSM1900_Bal_OUT1
RX_PCS_M
3
GND2 GSM1800_Bal_OUT2
L1004
4.7n
4
GND3 GSM1800_Bal_OUT1
FL1002
1
GSM850/900_IN GSM900_Bal_OUT2
2
GND1 GSM900_Bal_OUT1
3
GND2 GSM850_Bal_OUT2
L1009
8.2n
4
GND3 GSM850_Bal_OUT1
FL1001
R1002
GSM_PA_RAMP
2.2K
C1047
39p
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GSM_PA_EN
ANT_SEL0
C1126 C1123
DNI DNI
4. TROUBLE SHOOTING
TP1
TP2
C1013 1.5n
L1002
DNI
PCS(1930-1990 MHz)
L1003 2.2n
9
C1024 1.5n
8
C1028 8.2p
7
6
L1006 L1005
DCS(1805-1880 MHz)
DNI 3.9n
C1040 8.2p
C1041 10p
L1007
GSM(925-960 MHz)
L1008
DNI
9 15n
C1048 10p
8
L1035 8.2n
7
6
GSM(869-894 MHz)
L1012
L1013
10n
DNI
L1036 8.2n
Only for training and service purposes
RX_DCS_P
RX_DCS_M
RX_GSM_900_P
RX_GSM_900_M
RX_GSM_850_P
RX_GSM_850_M