LG GD580 - Page 126

- 127 -
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4. Trouble Shooting
Main Board (Bottom side) : Power for Radio ASIC
4.14.4 Checking VCC
AB3000
TP1
TP2
2.8V OK?
No
Yes
1.8V OK?
Yes
No
Check the AB3000
Check the AB3000
Check Point
VDIGRAD_1V8
(TP2)
Common Input Power is OK
See The Next Part
Check Point
VRADA_2V8
(TP1)
AB3000
A
B3000
TP1
TP2
57V
2
_KDD
V
804R
0
0
9
0
4
R
5
7
V2
_H
D
D
V
8V2_
A
D
AR
V
2
14C
u
2
.
2
8V1
_
DAR
G
I
D
V
4
14
C
u
1
T
A
B
V
58V
2
_
GD
DV
91
4R
0
8V1_E
D
DV
0
324R
5
V
1_DD
DV
5
V
2_F
D
DV
4
3
4
R
0
u
1
634C
2
1B
11
A
21
D
2
1
F
1
1B
21C
A
_
D
DV
O
D
LTX
E
D_D
D
V
E_D
DV
C
_DDV
H
_
D
DV
5
6V2
_
C
D
DV
8
V
1_E
D
DV
T
A
B
V
8
V
1_DARG
I
D
V
8
V2_AD
A
RV
5
7V
2
_
H
DD
V
5
6
V
2_
C
D
DV
5V1
_
DD
DV
TP1
TP2
AB3000