LG D337 - Page 28

4. DOWNLOAD
- 28 -
Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. Trouble Shooting
3.1.1.3 Checking RF signal path
P i
Test
P
o
i
nt
TP2(B1)
: C1649
TP4
TP2(B8)
: C1634
TP (B )
TP3
:R1101
TP1
: C1101
TP4
:R1102
TP5
SKY77589
(U1100)
TP2(B2)
: C1616
TP
2
(B
5
)
: C1600
TP6
:R1105
Circuit Diagram
TP5
:R1104
TP1
TP2(B1)
TP2(B2)
TP2(B5)
TP2(B8)
TP3
TP4
- 9 -
TP5
TP6
0.5p
C1104
1
2
C1112
47p
1
2
DNIL1154
2
1
C1116 22p
1
2
22pC1115
1
2
22pC1110
1
2
C1109 22p
1
2
DNI
C1106
1
2
C1107
DNI
1
2
C1105 22p
1
2
4321
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
1KR1104
21
R1105 1K
21
C1108 220p
1
2
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
2mm
C1101
2
1
1.2N
C1102
2
1
3n
C1103
1
2
1.2p
L1104
2
1
2.2n
TP1
TP3
TP5
TP4
TP6
TP2(B5)
TP2(B2)
TP2(B8)
TP2(B1)