Alto OEX-400, Service Manual

Page: 6 / 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
2-STAGE EQ
LOW HI
4
5
2
3
1
X4
LEFT(MONO)
4
5
2
3
1
X5
RIGHT
M
IA
N
-B
U
S
D
FX
(D
SP
)
2-STAGE EQ
CH INPUT
(CH1~3)
X6
TAPE IN TAPE OUT
4
5
2
3
1
X8
PRESETS
MUTE
DSP FOOT
M
A
IN
-B
U
S
DSP BOARD
7-STAGE EQ
63
H
Z
16
0H
Z
40
0H
Z
1K 2.
5K
6.
3K
16
K
MAIN LEVEL
MASTER METER
MONITOR METER
MONITOR LEVEL
X4
T
R
S
X7
T
R
S
X5
T
R
S
MONITOR OUT
PHONES OUT
LEVEL
DSP/FX AUX1 POST
X1
X2
X3
X1-3A
XLR&TRS
5
6
4
3
1
2
T
R
S
X1-3B
XLR&TRS
1
2
3
X9
XLR
LOW HI
LEVEL
DSP/FX AUX1 POST
2-STAGE EQ
LOW HI
LEVEL
DSP/FX AUX1 POST
BAL/UNBAL
CH INPUT
CH4/5
BAL/UNBAL
CH6/7
STEREO INPUT
STEREO UNBAL INPUT
AUX RETURN LEVEL
D
FX
(D
SP
)
LOW BOOST
1
2
3
4
J13
CON4
POWER MODEII
RMS 300W
X14
T
R
S
MASTER SPK OUT2
STEREO OUTPUT
STEREO OUTPUT
AUX RETURN
X6
T
R
S
FOOTSWITCH
FX SEND
X13
T
R
S
MASTER SPK OUT1
POWER_CONNECT
POWER SUPPLY
+22V
-22V
OEX-400_MIXER
+15V
+5V
-15V
- 4 -
3. Block Diagram