4. TROUBLE SHOOTING
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Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
L1154
100p
850,1900,2100MHz
FL1100
6
5
4
3
7
11
9
22
21
20
13
24
12
23
10
15
8
14
1
17
16
2
19
18
PCS_RX1
PCS_RX2
ANT
PCN_RX1
PCN_RX2
GND1
EGSM_RX1
GND2
EGSM_RX2
GND3
GND4
GSM850_RX1
GND5
GSM850_RX2
WCDMA_2100
WCDMA_850
WCDMA_1900
PCN_PCS_TX
GSM850_EGSM_TX
D
D
V
1L
RT
C
2L
RT
C
3L
RT
C
4L
RT
C
100n
L1101
L1105
15n
00
11
WS
4
2
1
3
1
G
A
C
2
G
33p
C1103
TP1
Schematic of GSM/DCS/PCS Tx Block
L1107
1.5n
L1152
22n
C1154
39p
L1109
12n
C1153
DNI
30
R1107
08
1
90
11
R
DNI
C1150
C1149
DNI
31
11
R
02
1
80
11
R
08
1
VBAT
C1132
10u
51
R1111
C1133
8.2p
U1101
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
02
1
21
11
R
C1152
5.6p
R1110
2.2K
GSM_PA_RAMP
DCS_PCS_TX
GSM_TX
GSM_PA_EN
GSM_PA_BAND
0603
0603
0603
2mm
8dB
5dB
1608
TP2
TP2