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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. Trouble Shooting
4.11 Bluetooth Trouble
Bluetooth IC (STLC2593) gets power from PMIC (AB3000) and clock (MCLK) from RFIC.
(RF3000) After checking them, Bluetooth RF path should be examined.
4.11.1 Bluetooth Power path
start
1. Check
BT IC Block
TP1: 1.8V , TP2 : 2.75V
1
Go to 4.11.2
OK
NG
Check AB3000
(U300)
Main PCB TOP
TP1
TP2
1
0603
0
1
2
C
u
1
.
0
6
L
5
L
4
L
8
F
7
F
4
D
6
E
7
N
4
J
2
M
2
C
1
C
8
M
3
C
2
B
1
L
C
_
R
V
S
R
_
T
B
2
L
C
_
R
V
S
R
_
T
B
D
_
R
V
S
R
_
T
B
M
S
D
_
R
V
S
R
_
T
B
N
_
R
V
S
R
_
T
B
F
R
_
R
V
S
R
_
T
B
L
R
T
C
_
G
E
R
_
T
B
D
V
H
_
T
B
D
L
C
_
D
D
V
_
T
B
1
C
N
2
C
N
3
C
N
4
C
N
5
C
N
6
C
N
5
7
V
2
_
K
D
D
V
8
V
1
_
E
D
D
V
u
1
.
0
2
1
2
C
0603
TP1
TP2