A
1
2
3
4
5
6
7
8
9
B
C
D
E
F
G
H
I
J
K
L
AV-S77
AV-S77C SCHEMATIC DIAGRAM (DSP)
44
DIR
PLL CONT
SELECTOR
DSP
ADC/DAC
LOGIC
RAM
Point
1
Pin 13 of IC3
Point
2
Pin 28 of IC6
IC1: NJM2904M
Dual OP-Amp
Q1
Q2 Q3
Q9
Q8
Q4
INPUTS
OUTPUT
V–
–
+
Q6
Q5
Q10
Q11
Q12
Q7
Q13
IC2: HD74HC02FPEL
Quad 2 Input NOR
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Y1
A1
B1
Y2
A2
B2
GND
VCC
Y4
B4
A4
Y3
B3
A3
IC6 : CS4227-KQ
6ch 20bit CODEC
10
9
8
7
6
5
4
3
2
1
11
24
25
26
27
28
29
30
31
32
33
23
12 13 14 15 16 17 18 19 20 21 22
44 43 42 41 40 39 38 37 36 35 34
SDIN2
SDIN3
CLKOUT
OVL
XTO
XTI
DEM
AOUT6
AOUT5
AOUT4
AOUT3
DATAUX
HOLD
SCL/CCLK
SDA/CDOUT
AD1/CDIN
AD0/CS
SPI/I2C
PDN
AIN3R
AIN3L
AIN2L
AIN2R
AIN1R
AIN1L
AINA
UX
CMOUT
NC
AGND1
VA+
AGND2
AOUT1
AOUT2
LRCKA
UX
SCLKA
UX
NC
DGND1
VD+
DGND2
SCLK
LRCK
SDOUT1
SDOUT2
SDIN1
VOLUME
CONTROL
VOLTAGE
REFERENCE
VOLUME
CONTROL
VOLUME
CONTROL
VOLUME
CONTROL
VOLUME
CONTROL
VOLUME
CONTROL
DEM
MONO
ADC
LEFT
ADC
RIGHT
ADC
INPUT
GAIN
ANALOG LO
W P
ASS AND OUTPUT ST
AGE
DAC#1
DAC#2
DAC#3
MUX
DAC#4
DAC#5
DAC#6
INPUT A
UX
DIGIT
AL FIL
TERS
SERIAL A
UDIO D
AT
A INTERF
ACE
DIGIT
AL FIL
TERS
CONTROL PORT
AUXILIARY INPUT
CLOCK OSC/
DIVIDER
3
8
37
38
34
33
32
36
35
30
27
18
31
20
28
29
2
1
44
43
41
39
4
5
6
7
40
19
16
21
22
23
24
25
26
15
14
13
12
11
10
9
CMOUT
AOUT1
AOUT2
AOUT3
AOUT4
AOUT5
AOUT6
AINAUX
AIN1L
AIN1R
AIN2R
AIN2L
AIN3L
AIN3R
AGND2
CLK
OUT
XTI
XT
O
HOLD
D
AT
AUX
LRCKA
UX
SCLKA
UX
DGND1
DGND2
PDN
LRCK
SCLK
SDIN1
SDIN2
SDIN3
SDOUT1
SDOUT2
OVL
DEM
AGND1
SCL/CCLK
SD
A/CDOUT
AD1/CDIN
AD0/CS
SPI/I2C
VD+
VA+
IC7 : IS61C1024-20J
128k x 8 High-speed CMOS Static RAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NC
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
VCC
A15
CE2
WE
A13
A8
A9
A11
OE
A10
CE1
I/O7
I/O6
I/O5
I/O4
I/O3
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A0 - A16
VCC
GND
CE1
CE2
OE
WE
I/O0 - I/O7
DECODER
I/O
DATA
CIRCUIT
CONTROL
CIRCUIT
COLUMN I/O
512 X 2048
MEMORY ARRAY
IC8~IC12: µPC4570G2
Dual OP-Amp
–
+
OUT1
–IN1
–VCC
+VCC
OUT2
1
2
3
4
5
+IN1
–IN2
+IN2
–+
6
7
8
IC14:
µ
PC29M33T-E1
Voltage Regulator
3
OUTPUT
1
INPUT
2
GND
Safety Drive
Limiter
Excessive Electric
Current Protection
Sudden Current
Protection
Starter Circuit
Driver
Standard Voltage
Overheat Protection
Amp.
IC15: TC74HC153AF
Dual 4 to 1 Data Selectors
15
STROBE
2G
2
B
SELECT
14
A
SELECT
13
12
11
10
9
OUTPUT
2Y
1
STROBE
1G
3
4
5
6
7
OUTPUT
1Y
16
VCC
8
GND
DATA INPUTS
DATA INPUTS
2C3
2C2
2C1
B A
2C0
2Y
2G
B A
1C3
1C2
1C1
1C0
1Y
1G
B A
B A
SELECT
INPUTS
B
X
L
L
H
H
A
X
L
H
L
H
STROBE
G
H
L
L
L
L
OUTPUT
Y
L
C0
C1
C2
C3
1
30
31
50
51
80
81
100
YSS918D-F
TC74HC153AF
1
4
8
1
7
14
1
11
12
22
23
33
34
44
1: OUT
3: IN
2: COM
1
16
8
IS61C1024-20J
YM3436
CS4227-KQ
2SC3326
DTA143EKA
PIN CONNECTION DIAGRAM OF TRANSISTORS,
DIODES AND ICS.
ISS355
µ
PC29M33T-E1
HD74HC02FPEL
NJM2904M
µ
PC4570G2
B
E
C
Anode
Cathode
1
16
32
★
All voltage are measured with a 10MΩ /V DC electric volt meter.
★
Components having special characteristics are marked
s
and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
Page 43 E8
Page 42
TO MAIN
E1
MAIN L
(FRONT L)
LFE (SW)
REAR L
MAIN L
4.8
4.9
0
0
0
0
0
0
0
0
0
0
4.1
0
4.1
4.8
0
0
4.1
4.8
0
4.1
0
0
0
0
0
0
4.8
0.1
4.8
0
0
2.2
0.1
0
0
0
4.8
0
4.8
4.8
2.3
0
0
0.7
4.8
4.8
0
2.1
4.8
0
0
0
0
2.1
4.8
1.4
4.8
0
0
0
2.4
4.8
2.3
4.8
0
4.7
0
0
0
0
0
4.8
0
2.3
2.3
2.3
2.2
0
2.4
2.4
2.4
2.4
2.4
4.8
4.8
3.3
~
~
0
0
0
2.3
-0.1
0
3.2
4.8
4.8
4.8
0
0
0
0
1.7
0
0
1.8
1.8
1.8
2.4
0
4.8
0
2.4
2.4
2.4
2.4
2.4
~
~
~
~
~
0.1
0.1
0.1
4.8
4.8
4.7
2.4
0
~
~
0.2
~
0
0.7
0.7
0.1
0.1
0.1
~
~
~
~
~
0
0
0.7
0.7
0.1
0.1
0.1
0.1
0.1
0.1
4.8
4.8
4.7
4.7
4.7
4.7
4.7
2.4
2.4
4.7
2.4
0
2.4
2.4
2.4
0
0
0
0
0
3.2
~
0
2.1
0
2.3
0
2.4
2.4
2.4
2.4
~
0
0
0.4
0
4.7
0
4.8
0.4
2.4
2.4
0
0
1.5
2.4
0
0
2.2
2.3
2.3
2.3
2.3
1.6
2.3
1.6
3.2
2.4
2.4
1.5
0
2.4
0.7
4.7
0.2
0
3.2
0
0
0
0
0
0
4.8
4.8
0
0
2.4
2.4
1.8
~
~
2.4
2.4
~
3.2
0
0
0
0
4.8
0
4.8
0
0
4.8
2.4
2.4
0
4.9
0
0
2.4
2.4
0.4
2.4
2.4
3.2
0
0
0
0
4.8
0
4.8
3.3
0
4.9
0
0
4.8
4.9
2.4
2.4
0
4.9
2.4
2.4
2.4
2.4
2.4
2.4
2.4
12.0
-11.7
2.4
2.4
2.4
2.4
2.4
2.4
12.0
12.0
-11.7
-11.7
2.4
0
4.9
2.4
2.4
0
4.9
2.4
2.4
0
0
0
0
0
12.0
0
0
0
0
0
-11.7
0
0
0
12.0
0
0
-11.7
0
0
0
0
1
2