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AUDIO
4
751899 SCH 2 of 6
C3
10µF
1
J1:1
D1
R9
R1
100k
47.5k
UNBAL 4
+5V
R10
R2
D2
100k
47.5k
J1:2
2
C4
10µF
C5
10µF
1
J2:1
D3
R3
R11
100k
47.5k
+5V
UNBA L 3
R12
R4
D4
100k
47.5k
J2:2
2
C6
10µF
C7
10µF
1
J3:1
47.5k
R13
R5
100k
D5
UNBA L 2
+5V
47.5k
D6
R14
R6
100k
C8
J3:2
10µF
2
C9
10µF
1
J4:1
D7
R7
R15
47.5k
100k
+5V
UNBA L 1
R8
D8
R16
47.5k
100k
C10
J4:2
10µF
2
MC L
MC
MC R
MM L
J5:7
3
+15V
MM
J5:8
J5:5
3
-15V
MM R
J5:6
C1
10µF
J5:2
DAC L
3
R17
J5:3
J5:1
3
DAC
J5:12
J5:10
C2
10µF
J5:11
DAC R
3
R18
14
8
8
14
1
7
7
1
2
6
6
2
K1
K8
D18
UNBAL4
BAL1
D10
14
8
8
14
1
7
7
1
2
6
6
2
K2
K9
D16
UNBAL3
BAL2
D11
14
8
8
14
1
7
7
1
2
6
6
2
K3
K10
D17
UNBAL2
BAL3
D9
14
8
1
7
2
6
K4
UNBAL1
D12
8
14
7
1
6
2
K5
+5V
D13
R21
2.21
+15V
C14
10µF
R22
2.21
8
14
-15V
7
1
6
2
C15
C13
K6
+5V
D14
C11
R25
10µF
1k
8
14
L INP BU S
7
1
6
2
R19
R23
100k
221k
K7
+5V
D15
C12
R26
10µF
1k
R INP BUS
R20
R24
100k
221k
29
C2600
+15V IN
-15V IN
C20
C23
.1µF
.1µF
+5V
+5V
+15V IN
-15V IN
+5V
C21
C24
.1µF
.1µF
+15V IN
-15V IN
C22
C25
.1µF
.1µF
+15V IN
-15V IN
+5V
5
C26
C18
47µF
100pF
7
C16
100pF
6
U1:2
K11
D19
-15V IN
3
C27
C19
47µF
100pF
B-
1
C17
B+
100pF
2
U1:1
+15V IN
-15V IN
3
C28
10µF
B-
C40
1
B+
100pF
2
U2:1
R29
+15V IN
100k
R35
R41
C46
10k
100pF
10k
C34
100pF
5
C29
C41
10µF
100pF
7
6
U2:2
R30
R36
100k
10k
R42
C47
10k
100pF
C35
100pF
-15V IN
3
C30
C42
10µF
100pF
B-
1
B+
2
U3:1
R31
+15V IN
100k
R37
10k
R43
C48
10k
100pF
C36
100pF
5
C31
C43
10µF
100pF
7
6
U3:2
R32
R38
100k
10k
C49
R44
10k
100pF
C37
100pF
-15V IN
3
C32
C44
10µF
100pF
1
B-
B+
2
U4:1
R33
+15V IN
100k
R39
10k
R45
C50
10k
100pF
C38
100pF
5
C33
C45
10µF
100pF
7
6
U4:2
R34
R40
100k
10k
C51
R46
100pF
10k
C39
100pF
5
22µF
4
1
L INP
3
2
R27
K12
R47
4.75k
22.1k
D20
+5V
MAIN
R48
22.1k
3
2
22µF
4
1
R INP
5
K13
R28
4.75k
30
C54
R49
10µF
22.1k
J7
2
+
C55
R50
10µF
22.1k
3
-
L
1
G
R63
R71
D47
D53
100k
100k
B A L 1
C56
R51
10µF
22.1k
J8
2
+
C57
R52
10µF
22.1k
3
-
R
1
G
R72
R64
D48
D54
100k
100k
C58
R53
10µF
22.1k
J9
2
+
C59
R54
10µF
22.1k
3
-
L
1
G
D49
D55
R65
R73
100k
100k
B A L 2
C60
R55
10µF
22.1k
J10
2
+
C61
R56
10µF
22.1k
3
-
R
1
G
R66
R74
D50
D56
100k
100k
C62
R57
10µF
22.1k
J11
2
+
C63
R58
10µF
22.1k
3
-
L
1
G
R75
D57
R67
D51
100k
100k
B A L 3
C64
R59
10µF
22.1k
J12
2
+
C65
R60
10µF
22.1k
3
-
R
1
G
R76
D52
D58
R68
100k
100k
C52
R69
215
1
L
J6:1
R61
D45
22.1k
F IX E D OUT
R62
D46
22.1k
C53
R70
J6:2
215
2
R
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