Alto OEX-400, Service Manual

Page: 11 / 37

1 2 3 4 5 6 7 8
A
B
C
D
8 7 6 5 4 3 2 1
D
C
B
A
D27
LED
R243
2k
POWER
DSP-OUT-L
3
2
1
U27A
4580M
R87
10K
C215
3N3 R212
27K
R86
10K
C214
56P
R236
10R
C62
47u/25V R167
2K2
R228
15K
R237
56K
R242
12K
3
3
1
1
2
2
TR1
J176
D4
1N4148
D5
1N4148
D3
1N4148
C63
47u/25V
R182
39K
R183
39K
+VCC
-VCC
MUTE
MAIN-BUS
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
CN1
HEADER 8X2
1
2
3
4
5
6
SW1
4BIT ENCODER
R185
680R
R186
680R
R187
680R
R188
680R
+5V
DSP-OUT-R
DSP-OUT-L
DSP-IN
+5V
10 11
U31E
74HC14
8 9
U31D
74HC14
12 13
U31F
74HC14
1 2
U31A
74HC14
3 4
U31B
74HC14
5 6
U31C
74HC14
TRIG
2
Q
3
R
4
CVolt
5
THR
6
DIS
7
VCC
8
GND
1
U30
NE555
CLK
12
J
14
K
13
CD
15
SD
11
Q
10
Q
9
U29B
74HC109
CLK
4
J
2
K
3
CD
1
SD
5
Q
6
Q
7
U29A
74HC109
1 2 3
P
SW2A
SW 6PIN
4 5 6
P
SW2B
SW 6PIN
+5V
C203
220N
R129
1M
C222
100N
FOOTSW
C233
1uF/35V
R90
10K
R246
220R
+5V
C225
100N
R89
10K
+5V
D7
1N4148
D9
1N4148
C224
100N
R131
1M
MUTE
DSP-IN
5
6
7
U28B
LM393
R193
470R
C223
100N
R206
7.5K
D6
1N4148
R245
820K
D8
1N4148
R244
2M2
R130
1M
R88
10K
3
2
1
U28A
LM393
C232
1U/50V
D18
RED
R169
4K7
+VCC
-VCC +5V
8
4
U27C
4580M
8
4
U28C
4580M
C184
0.1u
C185
0.1u C187
0.1u
C186
0.1u
+VCC
-VCC
1
3
2
VR23
W50K
1
2
3
J14
CON3
D23
1N4002
D24
1N4002
D25
1N4002
D26
1N4002
C216
1000U/35V
C231
1000UF/35V
C229
1000U/25V
C226
10U/25V
C228
1000U/25V
C227
10U/25V
Vin
3
ADJ
1
+Vout
2
U32
LM317T
VIN
2
ADJ
1
VOUT
3
U34
LM337T
C217
100N
C218
100N
C220
100N
C221
100N
R240
1.1K
R238
100R
R239
100R
R241
1.1K
+5V +VCC
-VCC
Vin
1
GND
2
+5V
3
U33
LM7805CT
C230
470U/16V
C219
100N
DSP-OUT-R
R211
27K
R85
10K
5
6
7
U27B
4580M
+5V
D28
1N4148
D29
1N4148
R250
1K
R251
2K
-VCC
AUX-RETURN-L
AUX-RETURN-R
1
2
3
4
5
6
7
8
9
10
J15
CON10
1
2
3
4
5
6
7
8
9
10
J16
CON10
+5V +5V
+VCC
+VCC
-VCC
FX-CLIP
FX-CLIP
+VCC5
-VCC5
- 9 -