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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. BB Circuit Technical brief
GM310f service manual
3.10.2 Function KEY back-light illumination
S-GOLD3H-LC is control the Tr for Function KEY back-light illumination.
[Figure 3.10.2-1] Function KEY back-light LED circuit diagram
3.11 LCD back-light illumination
AAT3169 is high efficiency charge pump LED driver using proprietary mAhXLife technology. The load
and supply conditions determine whether the charge pump operates 1X, 1.5X, or 2X mode.
[
Figure 3.11-1] LCD charge pump circuit diagram
I
V
A
N
K
2
.
2
3
0
1
R
LD103
L
H
-
4
0
1
H
W
T
-
C
S
S
T
A
B
V
K
1
8
0
1
R
2
0
1
Q
E
5
7
0
4
C
T
K
4
0
1
R
K
2
.
2
K
2
.
2
2
0
1
R
1
0
1
R
K
2
.
2
T
A
B
V
K
1
9
0
1
R
L
H
-
4
0
1
H
W
T
-
C
S
S
LD104
2
1
1
R
K
0
1
E
5
7
0
4
C
T
K
1
0
1
Q
LD102
L
H
-
4
0
1
H
W
T
-
C
S
S
L
H
-
4
0
1
H
W
T
-
C
S
S
LD101
K
0
1
3
1
1
R
3
L
B
1
L
B
F
F
/
W
R
LD105
L
H
-
4
0
1
H
W
T
-
C
S
S
L
H
-
4
0
1
H
W
T
-
C
S
S
LD106
K
1
1
1
1
R
E
5
7
0
4
C
T
K
3
0
1
Q
K
7
.
2
5
0
1
R
4
1
1
R
K
0
1
6
0
1
R
K
7
.
2
T
A
B
V
2
L
B
2
0
1
A
V
EVLC5S02100
1
0
1
A
V
u
1
.
0
4
0
1
C
7
0
1
A
V
EVLC5S02100
EVLC5S02100
6
0
1
A
V
2
0
1
C
T
A
B
V
u
1
0
1
1
R
K
0
0
1
u
2
.
2
5
0
1
C
u
1
3
0
1
C
1
0
1
C
D
N
G
0
1
N
I
9
6
P
C
T
U
O
5
1
D
N
G
P
u
1
1
T
-
O
F
I
9
6
1
3
T
A
A
1
0
1
U
4
+
1
C
-
1
C
5
7
+
2
C
8
-
2
C
1
D
1
1
2
D
2
1
3
D
3
1
4
D
4
1
5
D
1
6
D
2
3
T
E
S
_
N
E
EVLC5S02100
5
0
1
A
V
4
0
1
A
V
EVLC5S02100
EVLC5S02100
3
0
1
A
V
1
D
E
L
M
2
D
E
L
M
3
D
E
L
M
4
D
E
L
M
5
D
E
L
M
T
H
G
I
L
D
E
L
M
L
R
T
C
_
L
B
_
D
C
L
Содержание GM310
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