Microlab M-880 Schematics
JACK1
FRONT R
JACK1'
FRONT L
BASS IN
JACK2
REAR R
JACK2'
REAR L
C9 1UF
R9
47K
R9'
47K
R11 8.2K
VR1B
B50K
VR3B
B50K
R12
100K
VR1A
B50K
2
3
A
+VB
-VB
VR3A
B50K
1
2
1
2
1
2
C23
104
U2
U3
+VCC
U5
-VCC
1
2
2
5
TDA2030A
4
*
3
5
TDA2030A
4
*
3
-VCC
C8'
100UF/25V
TDA2030A
5
4
*
3
5
TDA2030A
U7
*
3
5
TDA2030A1
U8
*
3
2C8'
100UF
+VCC
R7
47K
R7'
47K
C24
100UF/25V
4
4
-VCC
SP1
6 ohm
*
C6
224
R8
3.3
SP2
6 ohm
*
C6'
224
R8'
3.3
C21
C22
104
100UF/25V
SP3
6 ohm
R19
47K
+VCC
C19
224
R20
3.3
2R7
47K
2R7'
47K
*
SP4
6 ohm
*
2C6
224
2R8
3.3
SP5
*
2C6'
224
2R8'
3.3
6 ohm
+VB
U1A
4558
2
1
3
C1
R1
1UF
100K
-VB
U1B
6
C1'
R1'
1UF
100K
C11
104
8
R13
1
U4A
4
4558
C12
104
D1
1N5402
D2
1N5402
2C1
1UF
2C1'
1UF
7
5
R14
47K
10K
+VCC
*
C25
3300UF
25V
C26
3300UF
25V
*
-VCC
+VB
U6A
8
4558
2
1
3
4
2R1
-VB
100K
U6B
6
7
5
2R1'
100K
R21
680/0.5W
R22
680/0.5W
2R9
47K
C2
822
R2
8.2K
C2'
822
R2'
8.2K
C13
224
R15
10K
2R2
8.2K
2R2'
8.2K
2R9'
47K
R3
3.3K
R3'
3.3K
6
57
U4B
C14
104
+VB
ZD1
C27
9.1V
47UF
ZD2
9.1V
C28
47UF
-VB
2C2
822
2C2'
822
2R3
3.3K
2R3'
3.3K
C15
0.47UF
VR2
B10K
R23
2.7K
R4
6.8K
R4'
6.8K
2R4
6.8K
2R4'
6.8K
C16
0.47UF
-VCC
C4
0.22UF
C3
472
C4'
0.22UF
C3'
472
R17
22K
LED1
2C4
0.22UF
2C3
472
2C4'
0.22UF
2C3'
472
R5
22K
R5'
22K
C5
22UF
C7
C8
100UF/25V
104
R6
560
C5'
22UF
R6'
560
C7'
104
C18
22UF
R18
560
2C7
2C8
100UF
104
2R5
2C5
22K
22UF
2R6
560
2R5'
22K
2C5'
22UF
2R6'
560
2C7'
104
AC IN
SW1
T250/1A
F1
*
+VCC
-VCC
2C25
3300UF
25V
2C26
3300UF
25V
2R21
680/0.5W
2R22
680/0.5W
2ZD1
9.1V
2ZD2
9.1V
+VB
-VB
2C27
47UF
2C28
47UF
M-880 /6004 SUBWOOFER
SYSTEM
2D1
T1
A
*
1N5402
*
2D2
*
1N5402
Microlab Technology Inc.
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