LG D337 - Page 66

4. DOWNLOAD
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Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
0.5p
C1104
1
2
DNIL1154
2
1
L1103 1.5n
2
1
C1116 22p
1
2
22pC1115
1
2
22pC1110
1
2
C1109 22p
1
2
L1108 82n
2
1
DNI
C1106
1
2
C1107
DNI
1
2
C1105 22p
1
2
GND2
GND5
GND11
TRX1
ANT
TRX2
GND10
TRX3
VRAMP
PGND3
PGND2
PGND1
TRX4
TRX5
TRX6
PGND6
PGND5
PGND4
PGND7
PGND8
PGND9
PGND10
PGND11
PGND12
PGND13
PGND14
PGND15
PGND16
GND1
GND12
GND3
GND4
GND6
GND7
GND8
TX_HB_IN
TXEN
TX_LB_IN
BS2
BS1
VBATT
VCC
GND9
MODE
U1100
SKY77589
16
15
14 13 12 11 10
17
9
8
7
6
4
3
28
1
44
43
42
41
40
39
38
37 36 35
32
33
34
24 23
22
29
30
31
18
21
25
20
26
19
27
5
2
R1102 1K
21
R1101 1K
21
L1106 DNI
2
1
1KR1104
21
R1105 1K
21
33pC1117
1
2
L1116 DNI
2
1
L1117
DNI
2
1
33pC1111
L1114 DNI
DNIL1115
2.2nL1112
2
1
TX_MODULE_TRX3
TX_MODULE_TRX2
TX_MODULE_TRX1
TX_MODULE_TRX4
GSM_PA_EN
ANT0_SW_SEL_0
ANT0_SW_SEL_1
ANT0_SW_SEL_2
B2
B1
B8
B5
( DGMS Guide )
MC-C00002-14 : ESD Protection Circuit
C1101
2
1
1.2N
C1102
2
1
3n
C1103
1
2
1.2p
L1104
2
1
2.2n
TP3
TP2 (DCS/PCS)
TP1
TP2 (GSM850/EGSM)
4. Trouble Shooting
3.4.1.3 Checking RF signal path
Circuit Diagram
TP1
TP3
TP2 (DCS/PCS)
TP3
TP2 (GSM850/EGSM)
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