Microlab M-200, M-300, M-290, M-600 Schematics
321
E
4
+VB
D
C
B
A
JK1
AC IN
AC ADAPTER IN
U1A
VR1A
B50K
C1
1UF
C1'
VR1B
B50K
1UF
R9
4.7K
R9'
+VB
R12
100K
SW1
C11
104
8
R13
2
3
U4A
4
4558
-VB
4.7K
R11
8.2K
C9
1UF
T1
1 2 34
2
3
R1
100K
6
5
R1'
100K
39K
1
C12
104
D1
1N5402
D2
1N5402
-VB
4558
U1B
R14
10K
+VCC
-VCC
1
7
C25
3300UF
25V
C26
3300UF
25V
R15
10K
R21
470/0.5W
R22
470/0.5W
C2
682
R2
8.2K
C2'
682
R2'
8.2K
C13
224
6
57
ZD1
9.1V
ZD2
9.1V
C14
104
+VB
-VB
U4B
R3
3.3K
R3'
3.3K
C27
47UF
C28
47UF
C15
0.47UF
VR2
B10K
R23
2.7K
R4
6.8K
R4'
6.8K
472
C16
0.47UF
-VCC
C4
0.22UF
C3
C4'
0.22UF
C3'
472
LED1
R17
22K
R5
24K
R5'
24K
C7
104
C5
2.2UF
R6
510
C5'
2.2UF
R6'
510
C18
22UF
R18
560
C8
100UF/25V
1
U2
2
1
U3
2
C7'
104
+VCC
1
U5
2
C23
104
-VCC
Title
Date: 27-Mar-2003 Sheet of
File: F:\huang bf\AN\M200-800.ddbDrawn By:
+VCC
C6
224
R8
3.3
C6'
224
R8'
3.3
C22
100UF/25V
C19
224
R20
3.3
SP1
4 ohm
SP2
4 ohm
SP3
4 ohm
5
TDA2030A
4
3
5
TDA2030A
4
3
-VCC
C8'
100UF/25V
TDA2030A
5
4
3
C24
100UF/25V
C21
104
R19
39K
R7
39K
R7'
39K
M200/300/290/600 SUBWOOF
Number RevisionSize
A4
L.M.An
D
C
B
A
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