Microlab M-920 Schematics

4321

+VCC

R5
510

R5'
510

LED1

C5

3.3UF

C5'

3.3UF

R14
510

C22
100UF/25V

C12
22UF

5

1

TDA2030

4

U2

2

C21

104

3

5

TDA2030

1

2

C23

104

1

2

Title

A4

Date: 4-May-2005 Sheet of
File: C:\Documents and Settings\wangzhao.MICROLAB\桌面\桌面\Copy of TMN-1 sch.DDBDrawn By:

4

U3

3

C22'
100UF/25V

+VCC

TDA2030
5

4

U4

3

-VCC

BM-2.1 SUBWOOFER SYSTEM

Number RevisionSize

-VCC

R15
22K

R6
22K

R6'
22K

JR1

0.5
C6

CC224

R7

2.2

JR1'

0.5
C6'

CC224

R7'

2.2

C13
CC224

R16

2.2

SP1
6 ohm

SP2
6 ohm

SP3
4 ohm

L.M.An

D

C

B

A

C2

R11
10K

472

R2

8.2K

C2'
472

R2'

8.2K

R3

3.3K

R3'

3.3K

C8
224

R12
10K

6

5 7

C9
104

+VCC

C14
3300UF
25V

C14'
3300UF
25V

-VCC -VB

U1D
LM324U1C

R17
560

R17'
560

C3

0.22UF

C3'

0.22UF

C10

0.47UF

+VB

R4

6.8K

R4'

6.8K

R13
10K

C15
100UF

C15'
100UF

C4
102

C4'
102

C11
102

R19

3.3K

JK1

F1

130C

VR2

B50K

VR1A
B50K

VR1B
B50K

R8

4.7K

R8'

4.7K

C1

0.22UF

C1'

0.22UF

T1

R9

8.2K

D

C

B

SW1

AC IN

A

1 2 3 4

R1
47K

R1'
47K

13
12

U1A
LM324

14

2
3

9

10

+VB

-VB

LM324

4

11

1

U1B

R10
12K

LM324

8

4xRL205

D1

D4

D2D3

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