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Ear Part
1
D
1/ 2VCC
*R3
*R b1
1K
1K
C1
2.2uF50V
2
R1
5
4
1K
8
7
3
C3
1
1000P
MIC1
C K-6.35
1/ 2VCC
C
*R4
*R b2
1K
1K
C2
2
R2
5
4
2.2uF50V
1K
8
7
C4
1000P
3
1
MIC2
C K-6.35
VCC
B
*R 26
R 27
47K
47K
*Q1
C1815
A
1
2
3
VCC
U1A
1/ 2VCC
3
UJM4558
C7
*R9
1
1K
2
VR 1A
4. 7uF/ 16V
C9
R7
10K
1uF/ 50V
A20K
R5
33K
C5
100P
R8
10K
VR 1B
U1B
5
C8
7
A20K
6
4. 7uF/ 16V
UJM4558
R6
33K
C6
100P
+5V
R 16
C 17
100uF/ 10V
R 28
10K
0. 1u
Q2
1015A
Q3
C1815
R 29
C 31
47K
10uF/ 16V
±
¸
2
3
4
VCC
U2A
1/ 2VCC
3
U2B
1
2
5
C X1
R 11
UJM4558
6
15K
10uF/ 16V
UJM4558
R 10
R 12
51K
47K
C 13
0. 47uF/ 16V
C 10
100P
R 15
R 25
15K
10K
C 15
220uF/ 16V
R 17
R 18
10K
12K
270P
C 22
3. 3uF/ 16V
C 16
4700P
C 23
U3
C 21
1
16
560P
C 24
18K
2
15
0.056u
3
14
4
13
5
12
C 25
R 19
C 18
6
11
0.056u
10K
0. 1u
7
10
8
9
10K
R 20
C 20
C 27
5. 6K
R 22
560P
15K
R 21
0. 1u
C 28
4700P
C 29
R 23
22uF/ 16V
4. 7K
4
5
Q4
VCC
C1815
+5V
R 30
1. 5K
D1
5. 6V
C 32
22uF/ 16V
7
C 12
R 13
1K
10uF/ 16V
C 11
100P
R 14
22K
MIC OUT
JP1
1
GND
4P2D54
2
+12V
3
4
C 14
4. 7uF/ 16V
R 24
10K
R 31
33E
C 26
VR2
3900P
C20K
C 34
220uF/ 16V
R 32
22K
C 30
4700P
R 33
22K
C 33
100uF/ 16V
C OMPANY
TITLE
GVG
FILE
REV
SHEET :
SHEET
OF
DATE
DESIGN
DR AW N B Y CHECKED B Y AP PR OVED B Y
5
6
D
C
VCC
B
C 36
0. 1u
1/ 2VCC
C 35
0. 1u
A
GV-DMA9 30 .SC H
A/0
6
37
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