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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
SW102
4
3
2
1
ANT
COMMON
G3
G4
SKY77544
SMRH0006201
U104
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
2.2K
R105
C171
1n
1n
C173
33p
C174
19
90
1
R
03
1
01
1
R
1n
C176
C178
1n
75
R111
39p
C182
19
21
1
R
47p
C155
10u
C216
47
R117
+VPWR
100n
L135
03
1
81
1
R
ANT_SEL0
ANT_SEL1
ANT_SEL2
ANT_SEL3
GSM_PA_RAMP
GSM_TX
DCS_PCS_TX
0603
ENWY0008701 (2.3X2.3X1.4)
DCS(1710-1785 MHz)
PCS(1850-1910 MHz)
GSM900(880-915MHz)
80
61
GSM850(824-849MHz)
7dB
11dB
2mm
R131
0
FL107 SFSY0037501
SAFEB897MAM0F00
5 3 2
4
1
IN
OUT
G1
G2
G3
C121
DNI
C104
100p
FL102
SDMY0002801
B7953
9
5
8
4
7
2
3
6
1
RX1
ANT
TX
GND1
GND4
GND2
RX2
GND3
GND6
C231
6.8n
C135
DNI
C136
DNI
C124
100p
C122
100p
0.5p
C230
SKY77701
SMPY0022701
U102
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VMODE_1
CPL_IN
VMODE_0
GND
VEN
CPL_OUT
C143 1.5p
L142 3.9n
L113
2.2n
R132
DNI
U103
SMPY0022801
SKY77702
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VMODE_1
CPL_IN
VMODE_0
GND
VEN
CPL_OUT
L140
2.7n
100p
C101
100p
C103
L119 1n
4.7u
C107
C139 1.5p
R101
49.9
C241
10n
L104 3.3n
C115
3n
C111
0.5p
1.8n
L105
DNI
C116
+VPWR
DNI
L106
C117
DNI
C118
33p
L107 2.7n
C119 33p
DNI
C125
4.7u
C127
DNI
C131
+VPWR
100
R102
R103
100
R104
68
SAYFP1G95AA0B00
SDMY0001901
FL103
7
5
8
4
9
2
3
1
6
ANT
RX
TX
GND1
GND6
GND2
GND5
GND3
GND4
C242
1n
SAFEB1G95KA0F00
SFSY0028101
FL105
5 2
4
1
3
G3
IN
OUT
G1
G2
100p
C132
C134 100p
C138 100p
L115
18n
L110
27n
L137 33p
DNI
L111
C141 33p
C105 33p
1.8n
L112
C233
0.5p
L120 2.7n
33p
C144
33p
C145
33p
C148
C147
2.2p
C140 1.5n
C106
15n
C114
3.9n
U101
SMPY0021901
ACPM-5208
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VBP
ISO
VMODE
GND
VEN
CPL
DNI
C249
C108
100p
2.2n
L136
FL114
SDPY0004701
ACMD-7407
7
5
8
4
9
2
3
1
6
ANT
RX
TX
GND1
GND6
GND2
GND5
GND3
GND4
C235 1.5n
+VPWR
C142 6.8p
C232
DNI
10p
C234
L141 3.9n
C129 100p
C236
4.7u
100p
C237
C238
100p
FL115 SFSY0034901
B9419
5
2
4
3
1
IN
OUT
_OUT
G1 G3
C239
3n
L138
4.7p
8.2n
L139
1n
C240
U100
EUSY0365401
BGA711L7
7
4
3
5
2
6
1
RFIN
RFOUT
EN
RREF
GS
VCC
D
N
G
P
10n
C244
10p
C245
VREG_TCXO_2.85V
FL113 SFSY0034701
SAFEA1G88KB7F00
5 2
4
1
3
G3
IN
OUT
G1
G2
100p
C246
C247
DNI
DNI
C248
C113
2.7n
27K
R125
ANT_SEL2
WCDMA_2100_ON
WCDMA_PA_R0
WCDMA_PA_R0
WCDMA_PA_R0
W_LNA_EN
W_850_900_ON
RX_WCDMA_2100
WCDMA_2100_TX_OUT
WCDMA_2100_RTX
WCDMA_850_900_TX_OUT
PDET_IN
RX_WCDMA_850_900_M
RX_WCDMA_1700_1900_P
RX_WCDMA_1700_1900_M
W_1700_1900_ON
WCDMA_1700_1900_TX_OUT
WCDMA_1700_1900_RTX
WCDMA_850_900_RTX
RX_WCDMA_850_900_P
REV.B
W900
REV.B
W1900
0603
W1900 Rx (1930-1990MHz)
W1900 Tx (1850-1910MHz)
REV.B
REV.B
REV.B
REV.B
REV.B
W2100
W900
W850 TX(824 - 849 MHz)
W900 TX(880 - 915 MHz)
W2100 TX(1920 -1980 MHz)
0603
0603
1608
1608
about 9.5 dB
W2100
W1900
TP1
TP2
TP2
TP2
TP3
TP3
TP3
TP4
TP4
TP4
Содержание E900
Страница 1: ...Service Manual Model LG E900 Internal Use Only Service Manual LG E900 Date September 2010 Issue 1 0 ...
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