Yamaha AS1000BL, Service Manual

Page: 56 / 85

IC412
IC411
IC410
CB405
W4005
CB406
CB403
CB404
W4004
IC414
IC414
CB401
CB407
CB408
CB402
IC404
IC404
IC405
IC405
IC406
IC406
A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
A-S1000
56
★
All voltages are measured with a 10M
Ω
/V DC electronic voltmeter.
★ 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.
FUNCTION 2/3
0
12.5
12.5
0 0 0 0 0 0
0
0
-12.4
0 0 0 0 0 0
0
0 0
0
0
0
0
0
0
0
0
0
0
0
0
0
12.5
-12.4
0
0
0
0
0
0
12.5
0
0
12.4
-12.3
12.5
12.3
0
0
0
0
-12.3
12.4
12.5
0
0
0
-12.1
-12.1
0
-12.2
0
0
0
0
0
0
0
12.5
12.5
12.5
0 0 0 0 0 0
0
0
-12.4
0 0 0 0 0 0
0
0 0 0
0
12.5
0
0
0
0
0
0
0
0
0
0
12.5
-12.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
12.5
12.5
0 0 0 0 0 0
0
0
-12.4
0 0 0 0 0 0
0
0 0
0
12.5
0
12.5
0
0
0
0
0
0
0
0
0
12.5
-12.4
0
0
0
0
0
0
0
0
0
0
0
0
0
24.6 25.6
25.6 24.6
-25.2
-24.6
25.2
24.6
25.6
0.4
1.1
0
0
0
0
0
1.0 1.1
1.0
1.0
0.5
0.4
-0.7
-0.7
-0.1
-0.1
25.1
24.6
1.0
1.0
-0.1
-0.7
-25.7
-12.1
11.7
-11.6
0
0
0
0
-10.9
11.0
10.9
11.0
0
0
-12.1
-12.1
-12.1
25.6
0.5
1.1
-0.2
-25.7
-0.7
0.5
5.9
5.9
-0.7
-0.7
-25.2
-25.7
-25.3
5.9
6.5
5.9
0
0.5 0.5
0
0.5
5.9
5.9
0.5
6.5
0.5
0
5.9
5.9
5.9
6.5
24.6 25.7
25.8 24.7
-25.4
-24.8
25.3
24.7
25.7
0.4
1.1
0
0
0
0
0
1.0
1.1 1.0
1.1
0.5
0.4
-0.7
-0.7
-0.7
-0.1
24.7
1.0
1.0
-0.1
-0.7
-25.8
12.6
12.6
0
0.6
0
-12.5
-12.5
-0.5
12.6
12.6
0
0.6
0
-12.5
-12.5
-0.5
25.6
25.6
0
0.6
0
-25.7
-25.7
-0.5
25.7
0.5
1.1
-0.2
-25.8
-0.7
0.5
5.9
5.9
-0.7
-0.7
-25.3
-25.8
-25.3
5.9
6.5
5.9
0
0.5
0.5
0
0.5
5.9 5.9
0.5
6.5
0.5
0
5.9
5.9
5.9
5.9
6.5
OUT L
IN L
IC410-412 : TC94A81UG
Electronic volume control
Zero crossing detection circuit
Decoder
24-bit shift register 39
38
37
36
35
34
33
1
32 31 30 29 28
L-SW-IN4
L-SW-OUT
L-ZX-IN
L-ZX-AGND
L-MVR-IN
L-MVR-AGND1
L-MVR-A
G
ND2
R-MVR-A
G
ND2
L-MVR-OUT R-MVR-OUT L-TVR-OUT R-TVR-OUT L-TVR-IN R-TVR-IN L-TVR-REF R-TVR-REF NC
40 L-SW-IN3
41 L-SW-IN2
42
43
45
L-SW-IN1
TEST
VDD
SS1
R-SW-IN4
R-SW-OUT
R-ZX-IN
R-ZX-AGND
R-MVR-IN
R-MVR-AGND1
R-SW-IN3
R-SW-IN2
R-SW-IN1
NC
VSS
Latch
Latch Latch Latch
Latch
Latch
Zero crossing detection circuit
Latch
Latch
Latch
Decoder
27 26 25 24 23
Latch
22
21
20
19
18
17
16
15
14
13
12
2
SS2
3
CS1
4
CS2
5
MUTEM
6
GND
8
MUTE
9
CK
10
DA
TA
11
STB
7
TC
Timing
gene
Test and
Power ON reset
Level shift
1
2
3
4
8
7
6
5
1OUT
1IN–
1IN+
V
CC–
V
CC+
2OUT
2IN–
2IN+
OUT
VCC–
VCC+
36 pF
37 pF
14 pF
7 pF
15
Ω
460 Ω
15 Ω
IN+
IN
IC404-406 : NE5532DR
Dual low-noise operational amplifiers
IC414 : BA15218F
Dual high slew rate, low noise operational amplifier
– +
+ –
1
2
3
4
8
7
6
5
OUT1
– IN1
+ IN1
VEE
VCC
OUT2
– IN2
+ IN2
1ch
2ch
A
+ + - -
1 OUTPUT A
INVERTING INPUT A
NON-INVERTING
INPUT A
V-
B
2
3
4
8 V+
OUTPUT B
INVERTING INPUT B
NON-INVERTING
INPUT B
7
6
5
IC404-406 : LME49723MA
Dual high fidelity audio operational amplifier
FUNCTION (2)
s400
s400
s400
s400
s400
s400
s403
s403
s403
s403
s403
s403
s401
s401
s401
s401
s402
s402
s404
s401
s401
s401
s401
s404
to FR
ONT (2)_CB504
P
age 59
C9
to FUNCTION (1)_W3003
P
age 55
K3
to FR
ONT (1)_CB517
P
age 59
K6
to MAIN (1)_W102
P
age 58
A3
to MAIN (2)_W202
P
age 58
A8
to FR
ONT (11)_W6
P
age 61
G4
to FUNCTION (1)_W3001
P
age 55
K4
to FUNCTION (1)_W3007
P
age 55
K4
to FUNCTION (1)_W3002
P
age 55
K6
to FUNCTION (1)_W3005
P
age 55
K6