LG GD330 - Music

- 46 -
LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Fig4-28. SW & FEM placement Fig4-29. SW & FEM schematic
CHECKING FLOW
Mobile SW
(Unplug RF cable)
Yes
No
No
Yes
Replace SW400
Check U401
Mobile S/W, FEM
is ok
Check SW400
between TP1 and TP2
Is short
FEM
(Plug RF cable)
Check Control Signal
TP3, TP4 is ok
TP3
TP4
TP1
TP2
SW400
U401
FL400
4.2.2.1 Mobile Switch & FEM Circuit
E1
00
-96
30
2
104
WS
TNA
1G
2G
3G
p33
614C
I
ND
22
4
C
424C
p51
3B
R
0062-0348MM
0
04W
S
GND1
3
GND2
4
5
GND3
6
GND4
IN
1
2
OUT
514
C
p
001
124C
I
ND
3
24
C
p65
2
2
9
D
NG
32
5
1TUO_XR0081MSG
6
2
TUO_X
R
0081
MSG
X
T_
0091_00
81
MSG
51
1TUO_XR0091MSG
7
8
2
TUO_X
R0
091
MSG
1
1TUO_XR058MS
G
2
2
TUO_X
R
058
MSG
XT_
0
09_058MSG
71
1TUO_XR009MSG
3
4
2
TUO_XR009
MSG
CN
12
91
1CV
2
CV
02
004LF
BF580
C-SHSL
11
TN
A
1
D
NG
9
42
01
DNG
2DNG
01
21
3
D
NG
4DNG
31
5
D
NG
41
6DNG
61
81
7
D
NG
8DNG
TP1
TP2
TP3
TP4