4. TROUBLE SHOOTING
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Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Schematic of WCDMA Band1, 8 Tx Block
L128
1.2n
C137
1.5n
100p
C143
C144
10n
2.7n
C133
33p
C132
DNI
L102
SW101
ENWY0003901
UFL-R-SMT10
G1
ANT
G2
C139
1.8n
L101
150n
C134
33p
C146
3.3n
C138
100p
DNI
L106
MS-156C
SW102
ENWY0008701
4
3
2
1
ANT
COMMON
G3
G4
1.8n
C135
1n
C120
4.7n
C163
L125
0.75p
C159
2.2n
DNI
L120
C152
1n
L116
0.5p
L113
0.5p
DNI
L115
3.9n
C151
220p
C150
DNI
L112
FL101
21
20
15
19
10
18
16
8
11
7
9
6
5
12
4
3
13
2
14
1
17
VDD
TRX_
3
SPI_CLK
TRX_
2
SPI_DRW
TRX_
1
GND1
GND6
GND2
TXH
GND4
GND3
AN
T
TXL
VSPI
TRX_6
GND5
TRX_5
SPI_S
S
TRX_4
PGND
VDD_2V85
L104
DNI
DNI
L105
L108
DNI
0.75p
L109
C136
1.8n
DNI
L103
2.7n
C147
DNI
L129
220p
C145
DNI
L135
U102
EAM62530601
B40251GY2045L
49
47
45
43
42
41
40
39
38
37
36
35
34
23
22
21
20
17
16
15
14
19
18
10
8
6
5
4
2
44
46
50
12
48
33
32
31
30
29
28
27
26
25
24
13
11
1
3
7
9
Tx_Band1
Tx_Band2
Tx_Band5
Tx_Band8
GND7 GND8 GND9 GND1
0
GND11 GND12 GND13 GND1
4
GND1
5
GND1
6
GND17 GND1
8
ANT_GSM1800
ANT_Band1
ANT_Band2
ANT_Band5
ANT_Band8
GND1
GND2
GND3
GND4
GND5
GND6
Rx_GSM1800_1
Rx_GSM1800_2
Rx_Band1_1
Rx_Band1_2
Rx_Band2_1
Rx_Band2_2
Rx_Band5_1
Rx_Band5_2
Rx_Band8_1
Rx_Band8_2
GND19
GND20
GND21
GND23 GND24 GND25 GND26 GND27 GND28 GND29 GND30 GND31 GND32
GND
RX_B1_H2
RX_B2_M2
RX_B5_L2X
RX_B8_L1X
SPI_DRW
SPI_S
S
SPI_CLK
VSPI
GSM_HB_TX
GSM_HB_TX
GSM_LB_TX
GSM_LB_TX
RX_GSM1800_M1
RX_GSM1800_M1X
RX_B8_L1
RX_B5_L2
RX_B2_M2X
RX_B1_H2X
revA(1.8nH) -> revB(1nH)
revA(1nH) -> revB(1.2nH)
revA(2.7nH) -> revB(1.8nH)
revA(1.5nH) -> revB(1.8nH)
revA(6.8nH) -> revB(3.3nH)
revA(5.6nH) -> revB(4.7nH)
revA(1.5pF) -> revB(0.75pF)
RF6361A
B1
GSM1800_RX
B8/EGSM
B5/GSM850
B2/GSM1900
revA(DNI) -> revB(2.2nH)
revA(2.7nH) -> revB(1nH)
revA(1pF) -> revB(0.5pF)
revA(0.75pF) -> revB(0.5pF)
revA(7p) -> revB(1.5nH)
revA(2.2n) -> revB(100p)
TP1
TP2
TP3
C148
4.7n
C149
8.2n
L114
DNI
C154
DNI
33p
C153
DNI
L117
VBAT
VBAT_PAM
C142
0.1u
R104
3.
3
C141
100n
R105
0
0
R106
EAN62491801
RF6261B
U103
17
18
19
20
21
10
11
12
13
14
15
16
9
8
7
6
5
4
3
2
1
B8_TX
B5_TX
GSM_LB_TX
B2_TX
B1_TX
GSM_HB_TX
B3_TX
HB_RFIN
SDI_EN
VCC
LB_RFIN
VSD
I
NC
SDI_GND
SDI_CLK
SDI_DAT
RF_GND
VCMO
S
FB_A
M
VBAT
T
RF_OUT
GND
SPI_DRW
SPI_SS
SPI_CLK
VSPI
PA_RF
PA_POW_DE
T
TX_H
TX_L
GSM_HB_TX
GSM_LB_TX
CP_OUT
revB(6.9nH)->revC(8.2nH)
revB(6.8nH)->revC(4.7nH)
TP4