Microlab M-500, M-560, M-820 Schematics
321
4
+VB
D
C
B
A
AC IN
JK1
SW1
U1A
4558
C1
1UF
C1'
1UF
C11
104
8
R13
U4A
4
4558
D21N4002
1
2
3
R1
100K
6
5
R1'
100K
39K
C12
104
-VB
U1B
+VCC
-VCC
R14
10K
1
7
C25
3300UF
25V
C26
3300UF
25V
VR1A
B50K
VR1B
B50K
R9
4.7K
R9'
+VB
4.7K
R11
8.2K
2
C9
3
1UF
R12
100K
-VB
T1
D11N4002
D31N4002
D4 1N4002
1 2 34
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
B50K
VR3B
C16
0.47UF
-VCC
C4
0.22UF
C3
333
VR3A
C4'
0.22UF
C3'
333
B50K
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\M-500.ddb Draw n B y:
+VCC
C6
224
R8
3.3
C6'
224
R8'
3.3
C22
100UF/25V
C19
224
R20
3.3
SP1
6 ohm
SP2
6 ohm
SP3
6 ohm
SYSTEM
L.M.An
5
TDA2030A
4
3
5
TDA2030A
3
C8'
100UF/25V
TDA2030A
5
3
4
-VCC
4
C24
100UF/25V
C21
104
R19
39K
R7
39K
R7'
39K
M500 /560/820 SUBWOOFER
Number RevisionSize
A4
D
C
B
A
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