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Q Q
3 7 6 3 1 5 1 5 0
5.
SUB 1/3 Circuit Board
5-1
Remove the lower case. (See Procedure 1.)
5-2
Remove the PITCH knob of the TAPE SPEED
CONTROL on the upper case and the six (6) screws
marked [320g].
The SUB 1/3 circuit board can then be removed.
(Fig.4)
6.
MIX 1/3 Circuit Board
6-1
Remove the lower case. (See Procedure 1.)
6-2
Remove the SUB 1/3 circuit board. (See Procedure 5.)
6-3
Remove the knob on the upper case and the twelve
(12) screws marked [320h].
The MIX 1/3 circuit board can then be removed.
(Fig.4)
7.
MIX 2/3, 3/3 Circuit Boards
7-1
Remove the lower case. (See Procedure 1.)
7-2
Remove the four (4) screws marked [320I] on the
plate. The plate with the MIX 2/3 and 3/3circuit
boards can then be removed. (Fig.4)
7-3
Remove the holding plate of each jack. The each
circuit board can then be removed.
T E
L
1 3 9 4 2 2 9 6 5 1 3
[320g]
〈 FRONT 〉
MIX 1/3
[320h]
w w w
.
Fig.4
[320g]
[320i]
MIX 3/3
SUB 1/3
〈 REAR 〉
[320h]
x
a o
u 1 6 3
MIX 2/3
y
i
[320i]
[320h]
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8
IC BLOCK DIAGRAM
TC4069UBP
IG001720
(
Hex Inverter
1A
1
14
V
DD
1Y
2
6A
13
2A
3
12
6Y
2Y
4
11
5A
3A
5
10
5Y
3Y
6
9
4A
7
V
SS
8
4Y
AN6292NK
(
XJ637A00
Dual dbx NR
Q
Q
3
7
6
3
1
28
27
26
25
24
23
LINE AMP.
OFF
OFF
EN
DE
EN
DE
EN
DE
EN
OFF
OFF
+
1
2
3
4
5
6
.
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2
4
9
9
8
TC4066BP
IX631591
)
(
)
Quad Bilateral Swich
Input (Output)1
1
14
V
DD
Output (Input)1
2
Control1
13
Output (Input)2
3
12
Control4
Input (Output)2
4
11
Input (Output)4
Control2
5
10
Output (Input)4
Control3
6
9
Output (Input)3
V
SS
7
8
Input (Output)3
)
5
1
5
0
8
9
2
4
B CH.
21
22
20
19
18
17
16
15
+
CCA-B
EN
DE
EN
DE
BUFFER
OFF
OFF
CCA-A
+
DE
OFF
REC OUT
DE
EN
AMP.
LEVEL SENSOR
7
8
9
11
12
14
10
13
A CH.
m
c o
MT400
2
9
9
NJM2068LD
XM356A00
(
)
NJM4558L
(I
X614610
)
M5216L
XB419A00
(
)
M5218AL
(
XH471A00
)
Dual Operational Amplifier
A
B
1
2
3
4
5
6
7
8
+
+
+
IN
OUT
IN
IN
V
IN
OUT
V
B
B
B
A
A
A
BA7755A
XH519A00
(
)
Head Switcher
9
8
2
9
9
1
2
3
4
5
VCC
SW
GND
CTRL2
CTRL1
BA6137
(
XA534A00
)
LED Driver
+
+
+
+
+
+
Constant
Current
Circuit
1
2
3
4
5
6
7
8
9
D1
D2
D3
D4
GND
D5
Amp
IN
V
CC
Output
11
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