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LG GD580 Service Manual page 126

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4.14.4 Checking VCC
TP1
AB3000
AB3000
C
4
3
1
u
C
1
2
V
D
D
_
A
B
1
1
E
X
T
L
D
O
F
1
2
V
D
D
_
D
D
1
2
V
D
D
_
E
A
1
1
V
D
D
_
C
B
1
2
V
D
D
_
H
Check Point
VRADA_2V8
Check Point
VDIGRAD_1V8
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
AB3000
Main Board (Bottom side) : Power for Radio ASIC
AB3000
6
C
4
1
4
C
4
1
2
1
u
2
2 .
u
(TP1)
(TP2)
Common Input Power is OK
See The Next Part
TP1
TP1
R
4
0
9
0
R
4
3
4
R
4
0
0
8
V
0
TP2
TP2
R
4
2
3
0
R
4
1
9
0
2.8V OK?
No
Yes
1.8V OK?
No
Yes
- 127 -
4. Trouble Shooting
TP2
V
R
A
D
A
_
2
V
8
V
B
A
T
V
D
D
D
_
1
V
5
V
D
D
E
_
1
V
8
V
D
G I
R
A
D
_
1
V
8
D
D
C
_
2
V
6
5
V
D
D
H
_
2
V
7
5
V
D
D
F
_
2
V
5
V
D
D
G
_
2
V
8
5
V
D
D
K
_
2
V
7
5
Check the AB3000
Check the AB3000
LGE Internal Use Only
V
B
A
T
V
R
A
D
A
_
2
V
8
V
D
D
D
_
1
V
5
V
D
D
E
_
1
V
8
V
D
G I
R
A
D
_
1
V
8
V
D
D
C
_
2
V
6
5
V
D
D
H
_
2
V
7
5
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