4. TROUBLE SHOOTING
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Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Schematic of GSM/DCS/PCS Tx Block
C1038
10u
HJ-ICT-06Y
ANT1003
1
100p
C1001
C1009
100p
100p
C1008
1.2n
C1022
4.7n
L1004
C1002 6.8p
DNI
C1125
VBAT
U1001
16
15
14
13
12
11
10
17
9
8
7
6
4
3
28
1
44
43
42
41
40
39
38
37
36
35
32
33
34
24
23
22
29
30
31
18
21
25
20
26
19
27
5
2
GND2
GND5
GND1
3
TRX1
AN
T
TRX2
GND1
2
TRX3
VRAMP
PGND3
PGND2
PGND1
GND10
TRX4
GND11
PGND6
PGND5
PGND4
PGND7 PGND8 PGND9
PGND10
PGND11
PGND12
PGND13
PGND14
PGND15
PGND16
GND1
GND1
4
GND3
GND4
GND6
GND7
GND8
TX_HB_I
N
TXEN
TX_LB_I
N
BS2 BS1 VBAT
T
VC
C
GND9
MODE
C1039
100p
1
2
8.2n
L1009
2
1
DNI
C1124
HJ-ICT-06Y
ANT1002
1
DNI
C1004
ANT1001
HJ-ICT-06Y
1
L1001
15n
2
1
C1003
DNI
DNI
C1128
130
R1012
2
1
R1011
47
2
1
130
R1013
R1008
91
2
1
R1007
91
75
R1006
SW1000
4
3
2
1
ANT
COMMON
G3
G4
100p
C1046
C1010
100p
C1127
0.5p
1n
C1118
1
2
HJ-ICT-06Y
ANT1005
1
100p
C1007
1
2
C1005
DNI
ANT_SEL2
ANT_SEL1
GSM850_GSM900_TX
DCS_PCS_TX
W1900_W2100_RTX
W850_W900_RTX
11dB
7dB
PCS(1850-1910 MHz)
DCS(1710-1785 MHz)
GSM850(824-849MHz)
2mm
GSM900(880-915MHz)
TP1
TP2
TP3