Alto MC500.4, Service Manual

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2
3
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56
A B C D
6
5
4
3
2
1
D C B A
PT-MC500.
4
AC POWER
POW
E
R
SW
IT
CH
CI
RCUI
T
BREAKER
POW
E
R 1
BRI
DGE
C
OUT
P
UT
1
POW
E
R 2
BRI
DGE
C
OUT
P
UT
2
POW
E
R 3
BRI
DGE
C
OUT
P
UT
3
POW
E
R 4
BRI
DGE
C
OUT
P
UT
4
CH1
C
H2
CH3
C
H4
A
C
17V
1 2 3
CH1 INP
U
T
1 2 3
CH2 INP
U
T
CH1
LEVEL CH2
LEVEL
CH1 AMP
CH1 AMP
F
ILTER
F
ILTER
1 2 3 4 5 6 7 8 9
10
11 12 13 14 15 16 17 18 19 20
ON
CH1 / CH2
MODE SW
IT
CH
1
C
L
IP LIM
IT-C
H
1
10
C
L
IP LIM
IT-C
H
2
3
FILTER
_FEQ
-C
H
1
8
FILTER
_FEQ
-C
H
2
2
FILTER
-O
N
/O
FF-C
H
1
9
FILTER
-O
N
/O
FF-C
H
2
4
PA
R
A
LLEL+
5
PA
R
A
LLEL-
6
PA
R
A
LLEL-LED
7
BRI
DGE
ON/
OF
F
M
O
D
E SW
ITC
H
SETTIN
G
S
OUTPUTS CH1/CH2
CH1 CH2
BRIDGE
FAN BRI
DGE
C
G1
+
12V
CL
IP
LIM
IT
CL
IP
LIM
IT
35Hz
/75Hz
35Hz
/75Hz
2
1 3
CH1
H
eat Pro
tectio
n
2
1 3
CH1
H
eat Pro
tectio
n
1 2 3
CH3 INP
U
T
1 2 3
CH4 INP
U
T
CH3
LEVEL CH4
LEVEL
CH3 AMP
CH4 AMP
F
ILTER
F
ILTER
1 2 3 4 5 6 7 8 9
10
11 12 13 14 15 16 17 18 19 20
ON
CH3 / CH4
MODE SW
IT
CH
1
C
L
IP LIM
IT-C
H
3
10
C
L
IP LIM
IT-C
H
4
3
FILTER
_FEQ
-C
H
3
8
FILTER
_FEQ
-C
H
4
2
FILTER
-O
N
/O
FF-C
H
3
9
FILTER
-O
N
/O
FF-C
H
4
4
PA
R
A
LLEL+
5
PA
R
A
LLEL-
6
PA
R
A
LLEL-LED
7
BRI
DGE
ON/
OF
F
M
O
D
E SW
ITC
H
SETTIN
G
S
OUTPUTS CH3/CH4
CH3 CH4
BRIDGE
CL
IP
LIM
IT
CL
IP
LIM
IT
35Hz
/75Hz
35Hz
/75Hz
2
1 3
CH3
H
eat Pro
tectio
n
2
1 3
CH4
H
eat Pro
tectio
n
ALTO MC500.4 BLOCK DIAGRAM