LG KF750 Service Manual page 177

4. TROUBLE SHOOTING
D. GSM PAM Check
1 5
1 6
1 7
1 8
1 9
2 0
2 2
2 4
2 1
TP25_RF
Vapc
2 3
(U100 pin 25)
2 5
2 6
2 7
2 8
LGE Internal Use Only
GSM/EDGE
PAM
(+Ant. SW)
(Top)
Figure 4-20. Test points of GSM900/DCS/PCS Tx
G N D 6
G N D 7
G N D 8
G N D 9
G N D 1 0
G N D 1 1
G N D 1 2
G N D 1 3
W C
D C S _ P C S _ N I
G S M _ N I
V A P C
V B A T T
B S 2
B S 1
S K Y 7 7 5 1 9
TP25_RF
Vapc
(U100 pin 25)
(Bottom)
P G N D
2 9
G N D 5
1 4
G N D 4
1 3
G N D 3
1 2
G N D 2
1 1
G N D 1
9
D M A 1
1 0
R X 1
7
R X 2
6
R X 3
5
R X 4
4
R S V D
3
M O D E
2
T X E N
1
A N T
8
U 1 0 0
Copyright © 2008 LG Electronics. Inc. All right reserved.
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TP26_RF
GSM900/DCFS/PCS
PAM Output
(C107)
C 1 0 7 2 2 p
TP26_RF
GSM900/DCFS/PCS
PAM Output
D
C 1
(C107)
Only for training and service purposes