4. TROUBLE SHOOTING
- 51 -
Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Schematic of GSM/DCS/PCS Rx Block
L1010
7.5n
L1005
5.6n
C1029
10n
C1030
2.7p
L1013
15n
C1036
2.7p
L1012
82n
L1019
18n
C1039
2.2p
C1037
2.2p
L1018
82n
SW1002
G1
ANT
G2
L1004
100n
R1001
DNI
DNI
C1001
L1007
5.6n
L1009
3.3n
DNI
L1003
R100
6
82
R1004
91
R100
7
82
L100
2
1.5n
FL1001
10
5
8
3
7
2
6
4
9
1
1842_5/1960MHz
1960MHz_2
GND5
1842_5MHz_1
GND1
1842_5MHz_2
GND2
1960MHz_1
GND3
GND4
R1010
180
VBAT
R1009
33
L1008
4.3n
R1011
180
C1028
39p
R1002
2.2K
C1020
100p
100p
C1019
C1018
100p
100p
C1017
SW1001
4
2
1
3
G1
A
C
G2
C1016
1.5n
L1006
4.7n
C1035
33p
FL1002
10
5
3
2
6
4
7
8
9
1 IN
O1_1
O1_2
O2_1
GND
O2_2
C_G
1
C_G
2
C_G
3
C_G
4
L1017
10n
U1002
24
17
18
19
13
12
6
5
3
1
2
16
20
15
14
4
22
11
10
9
8
7
23
21
TX_EN
PGND1
GND
GND2
GND3
RX1
RX2
VRAMP
GND5
AN
T
GND6
GPCTRL0
GND7
GND8
GND1
RFIN_LB
RFIN_HB
GND4
TRX1
TRX2
GPCTRL1
VBATT
GPCTRL2
PGND2
47p
C1014
C1105
33p
C1104
100p
3.3n
L1011
L1001
1n
10n
C1015
C1013
22u
GSM_PA_RAMP
WCDMA_LB_RTX
WCDMA_HB_RTX
RX_PCS_P
ANT_SEL0
ANT_SEL3
DCS_PCS_TX
RX_PCS_M
RX_DCS_P
RX_DCS_M
RX_GSM_900_P
RX_GSM_900_M
RX_GSM_850_P
RX_GSM_850_M
GSM_TX
ANT_SEL1
ANT_SEL2
GSM Quad
GSM900(880-915MHz)
GSM850(824-849MHz)
DCS(1710-1785 MHz)
PCS(1850-1910 MHz)
1608
5dB
GSM(869-894 MHz)
PCS(1930-1990 MHz)
DCS(1805-1880 MHz)
11dB
2mm
GSM(925-960 MHz)
TP1
TP2