Microlab A-6301 Schematics
654321
+VB
JK1
D
AC IN
R01
22K
R01'
22K
SW1
FUSE1
1A 250V
R
RCA
C
B
A
L
RCA
1 2 3 4 5 6
VR1A
B50K
C1
1UF
VR1B
B50K
C1'
1UF
R9
4.7K
R9'
4.7K
R11
8.2K
C9
1UF
4xRL205
T1
D3 D2
R1
47K
R1'
47K
U1A
082
2
1
3
-VB
U1B
082
6
7
5
+VB
C11
104
8
R12
2
1
3
U4A
4
4558
R10
100K
-VB
+VCC
D1D4
-VCC -VB
47K
C12
104
C23
3300UF
25V
C24
3300UF
25V
R13
10K
R22
150/0.5W
R23
150/0.5W
JK4
ZD1
9.1V
ZD2
9.1V
R14
10K
C13
224
+VB
C25
100UF/25V
C26
100UF/25V
6
5 7
U4B
C14
104
R24
1.8K/0.25W
R2
8.2K
R2'
8.2K
C2
682
C2'
682
LED1
C16
0.47UF
R3
3.3K
R3'
3.3K
R15
1K
VR2
B10K
LED2
R4
6.8K
R4'
6.8K
VR3A
B50K
VR3'B
B50K
C15
0.47UF
C4
0.22UF
C3
333
C4'
0.22UF
C3'
333
R17
22K
R5
22K
R5'
22K
C07
102
102
102
C21
104
C02
C02'
C7
104
C5
3.3UF
R6
510
C5'
3.3UF
R6'
510
C22
100UF/25V
C8
100UF/25V
5
1
U2
2
3
5
1
U3
2
3
C7'
104
+VCC
TDA2030A
5
1
4
U5
2
3
-VCC
Title
B
Date: 2-Dec-2003 Sheet of
File: F:\my file\My Design\A-6301.DDB Drawn By:
+VCC
TDA2030A
4
R7
39K
R8
3.3
TDA2030A
4
R7'
39K
R8'
C22
100UF/25V
3.3
R20
3.3
-VCC
C8'
100UF/25V
C21
104
R19
22K
C18
22uF
R18
680
A-6301
Number RevisionSize
JR1
0.5/0.5W
C6
224
C6'
224
C19
224
JR1'
0.5/0.5W
JR2
0.5/1W
SP1
6 ohm
SP2
6 ohm
SP3
4 ohm
D
C
B
A
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