A
Q
P
O
N
M
L
K
J
Q
P
O
N
M
L
K
J
H
G
F
E
D
C
B
A
H
G
F
E
D
C
B
12
11
10
9
8
7
6
5
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
H
C
AC1
AC2
AC3
AC4
AC5
AC6
AC7
AC8
AC9
µPC29M33T-E1(XU965A00)
REG33V
3
4
1
2
µPC2406AHF(XU886A00)
REG6V
1 : INPUT
2 : GND
3 : OUTPUT
1 : COMMON
2 : INPUT
3 : OUTPUT
3
2
1
PQ05RF2(XH672A00)
REG15V
2 : OUT
1 : IN
3 : GND
4 : ON/OFcont.
4
3
2
1
NJM7808FA(XD801A00)
REG8V
1 : OUTPUT
2 : COMMON
3 : INPUT
3
2
1
NJM7908FA(XD802A00)
REGULATOR -8V
1 : OUTPUT
2 : INPUT
3 : COMMON
3
2
1
NJM78M05FA(XJ604A00)
REG5V
1 : INPUT
2 : GND
3 : OUTPUT
3
2
1
D3SBA20(VT359600)
DIODE STACK 40A 200V
1S1885(VF514000)
1SR139-400T31(VU652800)
DIODE
1
2
MA2056A(V2909500)
ZENER DIODE 5.6V
1 : ANODE
2 : CATHODE
1 : ANODE
2 : CATHODE
1
2
TO SERVICE PERSONNEL
Critical Components Information
Components having special characteristics are marked
and must be replaced with parts having specifications
equel to those originally installed.
!
See parts list for details of circuit board
component parts.
Note :
J
U/C
H.BS
FUSE
TRANS
F1
F2
DISTINATION
XV350A0
3.15A 250V
2A 250V
XV351A0
3.15A 250V
2A 250V
XV352A0
T2.5AL 250V
–
MD4S OVERALL CIRCUIT DIAGRAM 2/2 ( MIX1/2,MIX2/2
(INPUT)
,SUB2/3 )
MIX 1/2
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
to SUB3/3-CN902
to MAIN-CN110
DIR [ 1- 4 ]
1
3
4
5
6
7
8
KEC-92345
LINE
INPUT
MIX 2/2 ( INPUT )
to MAIN-CN108
REGULATOR
REGULATOR
REGULATOR
to SUB 1/3-CN802
SUB 2/3
Power Transformer
AC IN
KEC-92346
KCE-92345
IN
OUT
THRU
MIDI
1
2
1
2
3
4
L
R
L
R
L
R
TRACK
DIRECT OUT
AUX SEND
2TR IN
STEREO
OUT
MONITOR
OUT
to MAIN-CN109
to MAIN-CN101
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
POWER
ON/OFF
: Ceramic Capacitor
1
K 5
6.8K
6.8K
6.8K
47
47
7.5K
7.5K
3
MD4S
MD4S
MD4S
w
w
w
.
x
i a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
