- 132 -
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Main Microphone path as below:
MIC
Æ
FB506
Æ
C249,C250
Æ
MSM7200A
Can you
scoping some
sound signal at
C249,C250?
Change the MIC
NO
YES
YES
make some sound or
voice to MIC
Work well?
Start
MIC_BIAS(C254)
is 1.8V?
Change the Main B’d
NO
Make a call
4.10.4. Microphone for main MIC
[MSM7200A]
YES
END
2
E
2
D
1
E
1
D
1
C
T8
U4
E5
G8
E4
B8
A8
A9
B9
G9
H9
G7
D6
E6
A7
B7
D7
E7
A5
A6
B5
B6
LI
N
E
_
L
_
IN
LI
N
E
_
L
_
IP
L
INE
_R_IN
L
INE
_R_IP
AUX
IN
AUX
IP
MIC1N
MIC1P
MIC2N
MIC2P
HP
H_V
R
E
F
HP
H_L
HP
H_R
E
AR1_O
N
E
AR1_O
P
LINE
_O
N
LI
N
E
_
O
P
CCO
M
P
AUX
O
UT
MICBIAS
TV
OU
T
T
V
DAC_R_S
E
T
R
E
P
I
W
R
L
_
M
Y
R
U
_
P
Y
L
L
_
M
X
L
U
P
X
100n
C2
4
5
1u
C2
4
6
C2
4
8
1
u
C
2
47
100n
C
2
49
100n
C
2
50
100n
100n
C2
5
1
100n
C2
5
2
I
N
D
C2
4
3
C
2
53
100n
22u
C2
5
4
100n
C2
5
6
C2
5
7
4
7
p
R2
1
6
4.7K
S
A
I
B
_
C
I
M
V
0
C2
4
2
FM_
R
FM_
L
L
X
2
X
_
H
C
U
O
T
R
X
1
X
H
C
U
O
T
LI
N
E
_
O
N
LI
N
E
_
O
P
RCV_
N
RCV_
P
HPH_
L
HPH_
R
MI
C
_
1
N
HS
_
M
IC
D
Y
1
Y
_
H
C
U
O
T
U
Y
2
Y
_
H
C
U
O
T
MI
C
_
1
P
Clo
s
e
t
o
D4
for the TEST
Deleted Rev C
1
0
5
C
I
M
B
P
-
H
5
R
H
0
1
4
0
U
P
S
4
3
2
1
P
1
G
2
G
O
S
A
I
B
_
C
I
M
V
2
0
1
8
0
0
0
H
B
F
S
6
0
5
B
F
N
1
_
C
I
M
P
1
_
C
I
M
C
.
v
e
R
d
e
t
e
l
e
D
Содержание Vodafone GM750
Страница 1: ...Service Manual Model GM750 Internal Use Only Service Manual GM750 Date September 2009 Issue 1 0 ...
Страница 225: ... 226 LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...
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