LG GT540 Service Manual page 86

ANT101 ANT102
L139
R112 6.8p C128
2.2n 100p
C160 C157
R113
100p DNI
DNI
GND
R117
GSM_PA_RAMP
2.2K
0603
C149
39p
R104
DCS_PCS_TX
51
DCS(1710-1785 MHz) 7dB
PCS(1850-1910 MHz)
R110
GSM_TX
82
GSM850(824-849MHz)
11dB
GSM900(880-915MHz)
2mm
0603
VBAT
C153
C179
C113
C155
10u 47p
C162
C164
TP1
ANT_SEL3
ANT_SEL2
ANT_SEL0
ANT_SEL1
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Only for training and service purposes
SW100
G1
A
C
G2
C159 33p
L107
100n
PGND16
PGND15
PGND14
1
DCS_PCS_IN PGND13
2
GND1
3
GSM_IN
4
VAPC
5
VBATT
6
BS2
U100
7
BS1
8
_TXEN
WCDMA3
29
PGND1 WCDMA2
30
PGND2 WCDMA1
31
PGND3
32
PGND4
33
PGND5
0603 34
PGND6 PGND12
PGND11
1n
PGND10
1n
1n
1n
WCDMA_1900_RTX
WCDMA_900_RTX
WCDMA_2100_RTX
44
43
42
41 C119 100p
L112
DNI
22
GND5
21
GND4
20
GND3
19
GND2
18
C117 100p
ANT
17
16
15 L111
DNI
40
39
38
56p
L110
5.6n
56p
L109
DNI
- 87 -
4. Trouble Shooting
RX_GSM_850_M
8.2n
2 3
FL104
L100
G1 O1 L108
1 GSM(869-894 MHz)
IN 18nH
68n
G2 O2
5 4
881.5MHz 8.2n
RX_GSM_850_P
8.2n
RX_GSM_900_M
2 3
FL103
L113
1 G1 O1 GSM(925-960 MHz)
L101
IN
68n
G2 O2
18nH
5 4
8.2n
RX_GSM_900_P
942.5MHz
C124 2.7n
RX_DCS_M
2 3
FL102
L114
1 G1 O1 DCS(1805-1880 MHz)
L102
IN
8.2n
G2 O2
10n
5 4
2.7n
C120
RX_DCS_P
1842.5MHz
1.2n
RX_PCS_M
2 3
FL101
L115
PCS(1930-1990 MHz)
G1 O1 L103
1
5.6n
IN
12n
G2 O2
5 4
1.2n
RX_PCS_P
1960MHz
LGE Internal Use Only