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A
B
AV-S77C SCHEMATIC DIAGRAM (MAIN)
1
MAIN L
0
0
0
0
-5.1
0
2
0
SELECTOR
0
0
-10.4
-5.1
0
0
0
0
-10.4
MUTING
0
11.9
0.7
0
0
0
3
11.9
0.7
0
J model
4
only
5
6
s
5.0
9.6
0
7
TO OPERATION
Page 43
G7
IC301, 302, 305, 307~312, 316: µPC4570HA
IC303: TC4052BF
Dual OP-Amp
Analog Multiplexers/Demultiplexers
VDD
16
1
2
-
+
+
-
A
10
1
2
3
4
5
6
7
8
9
Vcc Vo
-Vm
+Vm
V
+Vm
-Vm
Vo
Vcc
1
1
1
EE
2
2
2
9
B
8
6
INH
8
VSS
9
C
D
E
FROM DSP
Page 44
I4
11.9
0
0
0
5.1
5.1
0
0
0
INPUT
0
-11.6
0
0
0
4.7
0
4.7
11.9
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DSP
0
0
SELECTOR
0
0
0
0
0
0
12.0
-11.7
12.0
0
0
0
0
0
~
~
-0.2
-0.2
-10.6
-0.2
-0.2
~
-0.2
0
10.9
10.9
SIGNAL SENSOR
s
s
s
16.0
-0.2
16.0
-0.2
0
s
0
-26.0
s
-20.4
-25.4
-26.0
-14.7
s
-25.4
-29.6
-14.7
-29.6
s
IC304: TC9482N
Digital Volume
2
1
28
27
L–OUT A
3
L–IN A
4
1dB VR
LATCH
8dB VR
LATCH
L–A–GND A
5
13
X-COMMON
L–OUT B
6
12
0X
I/O c O/I
L–IN B
7
1dB VR
3 TO 7
14
I/O c O/I
1X
LATCH
DECODER
I/O c O/I
15
2X
8dB VR
4 TO 13
11
3X
LATCH
DECODER
I/O c O/I
L–A–GND B
8
1
0Y
I/O c O/I
L–OUT C
9
5
I/O c O/I
1Y
L–IN C
10
1dB VR
I/O c O/I
2
2Y
LATCH
4
I/O c O/I
3Y
8dB VR
3
Y-COMMON
LATCH
L–A–GND C
11
SHIFT REGISTER
STROBE
CS1
7
12
(32BIT)
GENERATOR
VEE
GND
13
LEVEL SHIFT
CK
14
F
G
11.9
0
0
0
-11.5
DIGITAL VOLUME
0
0
0
11.9
0
12.0
0
0
11.9
0
0
0
-11.5
-11.6
0
0
0
12.0
0
0
0
4.8
5.5
s
s
12.1
15.8
16.2
0
s
-0.2
-0.2
-17.7
s
0
-11.7
-17.4
s
IC313: NJM78M12FA
Voltage Regulator
26
R–OUT A
IC306: LC78212
Analog Function Switch
R–IN A
25
1
30
L1
R1
24
R–A–GND A
2
29
L2
R2
R–OUT B
23
3
28
L3
R3
22
R–IN B
4
27
LCOM1
RCOM1
R–A–GND B
21
L4
5
26
R4
R–OUT C
6
25
20
L5
R5
L6
7
24
R6
19
R–IN C
8
23
LCOM2
RCOM2
R–A–GND C
18
L7
9
22
R7
10
21
L8
R8
# All voltage are measured with a 10MΩ /V DC electric volt meter.
11
20
LCOM3
RCOM3
# Components having special characteristics are marked s and must be
V
19
LEVEL SHIFTER
DD
replaced with parts having specifications equal to those originally
V
16
SS
14
CS2
D1
17
LATCH
ZZ
12
installed.
V
EE
15
18
ZZ
CL
STB
RES
16
SHIFT REGISTER
# Schematic diagram is subject to change without notice.
17
13
S
CE
15
DATA
ZZ
H
I
0
11.9
0
0
0
-11.4
MAIN L
0
(FRONT L)
0
-11.4
0
-11.5
0
0
0
11.9
11.9
0
0
0
REAR L
-11.5
0
0
0
11.9
11.9
0
0
0
LFE (SW)
0
-0.2
0
MAIN L
(FRONT L)
s
5.5
11.5
6.1
6.1
0
AC
26.8
IC314: NJM78M05FA
Voltage Regulator
INPUT
V
IN
V
OUT
OUTPUT
GND
COMMON
J
K
L
AV-S77
PIN CONNECTION DIAGRAM OF TRANSISTORS,
DIODES AND ICS.
2SC2878
2SA1674
2SK304
DTA114ES
E
E
S
C B
G D
C B
1SR139
S1NB20
1SS133
MTZJ5.1B
MTZJ6.2B
+
MTZJ27.0B
Anode
–
~
~
Cathode
NJM78M05FA
NJM79M12FA
TC4052BF
NJM78M12FA
8
16
3: IN
3: OUT
1
1: OUT
1: COM
2: COM
2: IN
TC9482N
LC78212
15
14
30
28
1
1
IC315: NJM79M12FA
Voltage Regulator
COMMON
OUTPUT
INPUT
42
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