LG KP500 Service Manual page 106
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5.15.6 Checking FEM & Mobile SW
RF
6 C
0 0
6 R
9 0
GND600
GND601
D
I N
0
6 C
1 0
6 R
0 1
0
D
I N
6 R
1 1
0
6 L
1 0
2 1
H n
6 C
9 0
D
I N
Checking Points
FL600
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Mobile SW & FEM Circuit Diagram
TP5
6 C
2 0
6 C
u 1
3
p 9
TP2
TP1
SW600
6 C
6 0
6 L
3 0
7 1
2 G
A
T N
F R
1 G
2
2 .
H n
8 1
p 0
Figure 28. Mobile SW & FEM Circuit
TP4_R605 (FE2)
TP3_R604 (FE1)
TP5
TP2
Figure 29 Mobile SW & FEM
EGSM/GSM850
FE1
OFF
FE2
ON
Table 5. FEM TX Control Logic
- 107 -
VRF_2V85
TP3
3 0
6 C
4 0
6 C
5 0
4
p 7
4
p 7
FL600
DGM1110M014
SFAY0011101
DCS/PCS
ON
ON
5. Trouble shooting
V
1 C
V
2 C
P
N I
4 1
P
N I
3 1
G
S
8 M
0 5
E _
G
S
M
X T
L
H
D
S C
P _
S C
X T
H
H
F
1 E
F
2 E
G
S
8 M
0 5
E _
G
S
M
X R
L
L
D
S C
P _
S C
X R
H
L
TP4
U600
GND25
27
GND24
28
GND23
29
GND22
30
GND21
31
GND20
32
GND19
33
GND18
34
GND17
35
GND16
36
6 L
4 0
GSM_OUT
9
1
H n
GND5
10
6 C
1 1
6 C
2 1
GND4
11
RSVD2
D
I N
D
I N
12
GND3
13
GND2
14
GND1
15
6 C
4 1
SW600
TP1
LGE Internal Use Only
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Troubleshooting
