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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
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4.15.8 Check RF Signal Path – Tx Path
Check Tx signal Path (AD6546(U100)
Æ
GSM PAM(U101)
Æ
FEM(FL101))
-FEM(FL101)
-PAM(U101)
-FEM(FL101)
Checking Points and Flow
TP5
TP3
TP4
TP2
TP1
TP5
TP3
TP4
TP1(DCS/PCS)
TP2(GSM850/900)
L102
100n
R116
39
FL102
3
2
4
1
COUPLING
IN
500HM
OUT
C140
DNI
SW101
G2
ANT
RF
G1
470
R108
DNI
C120
R110
270
R109
20
270
R111
FL100
3
2
4
1
COUPLING
IN
500HM
OUT
C110
5.6p
R106
12
SKY77336
U101
23
22
24
21
25
20
26
19
27
18
28
17
9
8
10
7
11
6
12
5
13
4
14
3
15
2
16
1
DCS_PCS_IN
DCS_PCS_OUT
BS
GND6
TX_EN
GND5
VBATT
VCC_OUT
VAPC
GND4
NC
GND3
GND1
GND2
GSM_IN
GSM_OUT
PGND1
PGND12
PGND2
PGND11
PGND3
PGND10
PGND4
PGND9
PGND5
PGND8
PGND6
PGND7
R117
150
51
R115
R118
150
C112
22n
FL101
836.5 ,1880MHz
20
19
13
11
18
15
8
14
7
12
6
9
5
4
10
3
16
2
1
71
T
N
A
GSM850RX1
GSM850RX2
GND4
GSM900RX1
VC2
GSM900RX2
GSM1800RX1
GND1
GSM1800RX2
GND2
GSM1900RX1
VC1
GSM1900RX2
GSM850_900TX
GND5
GSM1800_1900TX
GND3
NC1
NC2
100p
C114
C117
100p
100p
C124
VBAT
C125
100p
C129 100p
39p
C105
R107
470
C107
22u
L107
18n
C118
8.2p
ANT_FEED
GND
RF_ANT_SW2
RF_ANT_SW1
RF_PA_EN
RF_PA_BAND
TP5
TP
TP4
TP1
TP2
Содержание LG-S310
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