Alto OEX-400 Service Manual page 8

1 2
R97
12K
C73
22P
U8B
6
CH4/5-IN
D
5
4580M
R31
22K
R164
12K
C74
22P
C45
U10A
47u/25V
2
TAPE-IN
1
3
4580M
R33
22K
C
C43
1
47u/25V
R15
2
3 3K9
C42 R16
X9
3K9
47u/25V
XLR-M
C44
X10 4 47u/25V
T
5
R37
2
22K
R
3
1
S
R38
C50
SCJ-0658-1-Y
47u/25V 22K
TAPE IN
C52
X11
4 47u/25V
TAPE OUT
5
R39
2
22K
3
1
R40
C51
SCJ-0658-1-Y
B
47u/25V 22K
TAPE OUT TAPE IN
C53 R74
LCH IN
47u/25V 22K
R75
C54
RCH IN C194 C195
47u/25V
100P 100P 22K
X12 R170
2.2K
UNBAL-4P
2.2K
R171
-VCC -VCC4
R144
10
C132 C134 C136
0.1u 0.1u 0.1u
A
C133 C135 C137
0.1u 0.1u 0.1u
R145
10
+VCC U7C +VCC4 U8C U9C
4580M 4580M 4580M
1 2
3
3 1
R14
VR13
R13
B50K
3K9
3K9
C35
EQ HI
C85
47u/25V
10KHZ
4N7(M) 2
C34
3
47u/25V
R113
7
LO 8K2 U9A
4580M
100HZ
C95
VR14 C90
R112 R114
4.7u/50V
B50K 4N7(M) 8K2
8K2
3 1
3 1
VR17 R18
R17
B50K
3K9
3K9
C46
EQ HI
C86
47u/25V
10KHZ
4N7(M)
2
3
R118
8K2 U11A
LO
4580M
100HZ
C96
R117 VR18 C91 R119
4.7u/50V
B50K 4N7(M)
8K2
8K2
3 1
R66
10K
C75
22P
U8A
2 C97
1
J10 J11 3
47u/25V
1 1
4580M
R67
2 2
10K
3 3
C78
4 4
5 5 22P
6 6
7 7
R76
8 8
10K
9 9
C76
10 10
22P
U7A
11 11
12 12 2 C99
1
CON12 CON12 3
47u/25V
4580M R78
10K
C79
22P
R77
10K
C77
22P
U7B
6 C98
7
5
47u/25V
4580M R81
10K
C80
22P
TAPE-IN
TAPE-OUT
3
4 5
C37
R115
C107
C106
22P
8K2
47u/25V
R135
22P
36K
2
R127
VR15
U9B 6
1M
W50K
7
4580M
R32
1 5
22K
C36
47u/25V
R62
10K
J4
R98
PRE/POST
20K
C38
R116
C108
C111
22P
8K2
47u/25V R136
22P
36K
2
R128
VR19
U11B 6
1M
W50K
7
4580M
R34
1 5
22K
C47
47u/25V
FX-SEND
VR20
R69 R99
2
W50K
10K 20K
J5
PRE/POST
R68
CH4/5-IN
10K
X13
4
T
5
2
R
3
J12
1
S
CON4 SCJ-0658-1-Y
OUT1
1
2
R80 X14
4
3
5
4
2
20K
3
1
SCJ-0658-1-Y
OUT2
X15
4
5
2
3
1
SCJ-0658-1-Y
R79
AMP MO OUT----NC
20K
-VCC
-VCC5
R146
10
C144 C138
0.1u 0.1u
C145 C139
0.1u 0.1u
R147
10
U13C U10C +VCC5 U11C
4580M
+VCC
4580M 4580M
4 5
- 6 -
6 7
C109
22P
C39
47u/25V
R161
MAIN-BUS
62K
R63
10K
2 C40
1
3
47u/25V
U12A
4580M
2
VR16
W50K
FX-SEND
C112
R35 22P
C48
C196
22K
47u/25V R165
1N5
2K2
2
R168
1
R71
3
10k
10K
U13A
R36
R70
4580M
22K
10K C113
22P
R72
10K
6
5
MAIN-BUS
U12B
4580M
-VCC1
C140 C142
0.1u 0.1u
C141 C143
0.1u 0.1u
+VCC1 U12C
4580M
6 7
8
C110
22P
R65
18K
R64
6 C41 D
7
10K
EFFECT-IN
5
47u/25V
U14B
4580M
2
U14A
1
4580M
3
C114
22P
R73
10K
R162
10K
6
7
DSP-IN
5
U13B
C
4580M
7
MAIN-IN-EQ
C49
47u/25V
B
A
8