Only For Training And Service Purposes - LG GM200 Service Manual

(2) Checking Mobile SW & PAM
CIRCUIT
2 4
G N D 1 4
2 3
G N D 1 3
2 2
G N D 1 2
2 1
U 5 0 2
G N D 1 1
2 0
G N D 1 0
1 9
G N D 9
S M 0 0 0 5 2 0 1
R H
1 8
G N D 8
1 7
A N T
S K Y 7 7 5 3 1
TEST POINT
Figure 4.2.2
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Only for training and service purposes

2
V L O G C I
3
V R A M P
4
T X _ E N
5
B S 1
6
B S 2
7
G N D 2
8
G N D 3
9
G N D 4
SW501
R 5 0 6 1 0 0
R 5 0 7 1 K
R 5 0 8 1 0 0
R 5 0 9 1 0 0
R 5 1 0 1 0 0
TP2
WAVEFORM
PCS1900 RX
ANT_SW1
TP1
TP3
ANT_SW2
TP1
TP2
PA_EN
Graph 4.2.2 PAM Control Signal
- 73 -
4. TROUBLE SHOOTING
TP3
o h m
P A _ B A N D ( G I P O _ 0 7 ) 0
T X _ R A M P
o h m
P A _ E N ( G I P O _ 0 6 ) 0
o h m
( G I P O _ 0 6 ) 6
A N T _ S W 1
o h m
( G I P O _ 0 6 ) 5
A N T _ S W 2
TP1
Low
TP2
Low
TP3
Low
LGE Internal Use Only