4. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
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ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ͑
͑
G
Schematic of GSM/DCS/PCS Tx Block
TP1
TP3
TP2
R1001
DNI
SW1000
4
2
1
3
1
G
A
C
2
G
C1018
39p
19
90
01
R
C1045
1n
C1049
1n
3.9p
L1040
C1004
15n
R1000
100p
ANT1000
C1046
1n
L1042
DNI
C1042
47p
19
80
01
R
L1000
100n
ANT1001
C1001
2.7n
C1106
DNI
75
R1006
VBATT
0.5p
L1001
03
1
50
01
R
47
R1003
03
1
40
01
R
R1002
2.2K
U1001
31
30
29
44
43
42
41
40
39
38
73
63
53
16
15
41
31
21
11
01
34
33
32
17
9
18
8
19
7
20
6
21
5
22
4
32
3
42
2
52
62
72
82
1
DCS_PCS_IN
11
D
N
G
01
D
N
G
9
D
N
G
8
D
N
G
GND1
7
D
N
G
GSM_IN
6
D
N
G
VAPC
GND5
VBATT
GND4
BS2
GND3
BS1
GND2
_TXEN
ANT
E
D
O
M
WCDMA3
PGND4
PGND5
PGND6
P
M
ET
4
X
R
3
X
R
2
X
R
1
X
R
WCDMA1
WCDMA2
7
D
N
G
P
8
D
N
G
P
9
D
N
G
P
PGND10
PGND11
PGND12
PGND13
PGND14
PGND15
PGND16
PGND1
PGND2
PGND3
L1041
DNI
ANT1004
C1043
1n
GSM_PA_RAMP
ANT_SEL3
ANT_SEL0
ANT_SEL2
ANT_SEL1
WCDMA_900_RTX
WCDMA_2100_RTX
GSM_TX
DCS_PCS_TX
80
61
0603
0603
0603
DCS(1710-1785 MHz)
PCS(1850-1910 MHz)
GSM900(880-915MHz)
GSM850(824-849MHz)
7dB
11dB
2mm
TP1
TP3
TP2