Yamaha AS-1000 Schematic
ABCDEFGH I J
1
■ BLOCK DIAGRAM
A-S1000
FRONT
• See page 59-61 →
SCHEMATIC DIAGRAM
2
RY101
PHONO
L/R
RY_MMMC
CD L/R
3
TUNER L/R
LINE1 L/R
LINE2 PB L/R
LINE2 REC OUT L/R
Q1001-1016
HEAD AMP
MM/MC
MC
RY102
Q1017-1038
EQ AMP
IC301
RY_PHONO
POL/POR
RY103
RY_CD
RY_TU
RY_L1
RY_L2
INPUT
SELECTOR
INPUT BUFFER
VOLUME & TONE CONTROL
IC410
ATT.1
IC411
ATT.2
IC412
ATT.3
IC404
IC405
IC406
FUNCTION
TONE CONT ROL DEVICES
RY_BYP
RY402
FLAT
LINE AMP.
IC413
• See page 55-57 →
SCHEMATIC DIAGRAM
HOT(+)
COLD(-)
RY_DIR
RY404
MAIN DIRECT
RY403
FLOATING BALANCED
POWER AMPLIFIER
SPEAKER DRIVER
HOT (POSITIVE PHASE) SIDE
SPEAKER DRIVER
COLD (NEGATIVE PHASE) SIDE
FRONT
SPCH A L/R CH
RY201/R111
SPCH B L/R CH
RY202/R112
RY_SPA
RY_SPB
BUFFER AMP.
4
PRE OUT
MAIN IN
IC302
IC303
PRD PRI THM
IC414
RY501
• See page 59-61 →
SCHEMATIC DIAGRAM
SPEAKERS L/R CH
to POWER AMP.
R CH
PHONES
+
A
-
+
B
-
PRD
THM
RY_DIR
RY_BYP
RY_UNBAL
5
RY_PHONO
LED_PWR
54
34
32RY_BAL
26RY_CD
27RY_TU
28RY_L1
29RY_L2
55RY_MMMC
56
25
REM
53 2,3
39
SP_AB
6
HP_PRD48PSVA147PSVA2
1,64
62,63
IC502
MICRO
PROCESSOR
46
IC501
15
5I_BAS
4
I_TRE
2I_SEL
12
I_LRBAL
BALANCE UNBALANCE
60 PRV1 PRV
17
16 RY_PWR
35
RY_HP
4
RY_SPA
5
RY_SPB
41-43A/B/C
9-113,4
1I_VOL
36,37MVOL+/-
+20V/-20V
+25V/-25V
For EQ AMP
For MC AMP
INDEPENDENT REGULATED POWER SUPPLY
(for AUDIO)
PDET
+25V/-25V
For LINE AMP1
For LINE AMP2
SUB-TRANSFORMER
T1
+25V/-25V
For VOLUME1
+12/-12V
+33V
-33V
+12V/-12V
For VOLUME2
(for POWER AMP
/ VOLTAGE AMP STAGE)
PRV
D305
PRV
D304
CONVERTER
POWER TRANSFORMER
LOW IMPEDANCE DRIVE
HEADPHONE AMP.
FLOATING POWER SUPPLY
POWER SWITCH
for MICROPROCESSOR
RY1
HP END
INDEPENDENT
D335
D336
D300
AC IN
SPEAKER
TREBLE
BALANCEBASS
REMOTE
7
FRONT
• See page 59-61 →
SCHEMATIC DIAGRAM
FRONT PANEL
INPUT SEL
VOLUME
VR501
FUNCTION
• See page 55-57 →
SCHEMATIC DIAGRAM
PRV
D301
D306
RY_HP
L CH
for HOT
L CH
for COLD
R CH
for HOT
R CH
for COLD
IC51
IC52
+B3/-B3
+B4/-B4
+B1/-B1
+B2/-B2
PSVA1
PSVA2
+12V
to SPEAKERS RELAY
-12V
JK501
MAIN
• See page 58 →
SCHEMATIC DIAGRAM
FUNCTION
• See page 55-57 →
SCHEMATIC DIAGRAM
35
A
BCDEFGH I JK
L MN
SCHEMATIC DIAGRAMS
A-S1000
FUNCTION 1/3
1
W3006
Page 61
2
CB302
to FRONT (12)_CB59
Page 57
25.0
s310
s310
25.5
0
25.5
0.6
0.6
W3003
W3007
-0.8
25.5
1.0
0.4
-0.2
-25.3
24.4
3
Page 60
to FRONT (10)_W1002
M5
CB301
5.9
CD L
5.9
0
s311
11.9
-12.1
25.4
6.5
5.9
5.9
0
0.5
0.5
4
24.4
-24.2
-2.42
-25.3
0
0
-24.7
1.0
1.0
-0.8
-24.3
1.0
0.2
-0.8
W3001
to FUNCTION (3)_W3
Page 56
to FUNCTION (2)_CB403
Page 56 B7
to FUNCTION (2)_CB408
H2
H8
M5
-12.1
-12.1
INPUT
24.3
0
-25.5
-0.5
-25.5
-0.5
Page 56
B7
to FUNCTION (2)_CB402
5
-12.1
s310
s310
W3002
W3005
Page 56
B5
to FUNCTION (2)_CB401
-0.7
25.4
1.0
0.4
-0.2
-25.3
-12.1
24.3
6.0
6.0
0
s311
6
-12.1
-12.1
25.4
6.5
6.0
6.0
0
0.5
0.5
0.5
24.3
-24.2
-24.2
0
0
-24.7
1.0
1.0
-0.7
-24.3
1.0
0.4
0.2
-25.3
Page 56
to FUNCTION (2)_CB407
LINE 2
0
-12.0
7
0
0
-12.0
0
8
12.5
0
IC301
0
0
IC301
-12.4
0
0
0
0
0
0
0
0
0
12.5
IC302
IC302
-12.4
12.5
IC303
0
11.9
0
-11.9
0
IC304
0
0
0
12.6
W3004
Page 59
to FRONT (1)_CB519
0
0
-12.0
0
0
0
0
-12.0
-12.0
0
0
-12.0
9
0
0
IC303
-12.4
0
0
IC304
-11.8
0
0
CB305
-12.4
Page 60 M7
to FRONT (10)_W1003
B6
K7
-INPUT
+INPUT
IC301-303: NJM2082M-TE1
Dual J-FET input operational amplifier
A OUTPUT
A-INPUT
A+INPUT
V-
8
V+
2,6
3,5
4
V-
A
2
+
–
3
4
IC304: NJM2068MD-TE2
Dual operational amplifier
OUT1
1
–IN1
2
+–+
3
+IN1
4
–VCC
V+1
8
B OUTPUT
7
B
B-INPUT
6
+
–
B+INPUT
5
1,7
OUTPUT
+VCC
8
OUT2
7
–
6
-IN2
5
+IN2
10
FUNCTION (1)
★ All voltages are measured with a 10MΩ/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.
55
A-S1000
A
BCDEFGH I JK
L MN
1
2
3
4
5
6
FUNCTION 2/3
K6
Page 55
to FUNCTION (1)_W3002
Page 55 K6
to FUNCTION (1)_W3005
CB401
CB407
IN L
s400
0
0
00000
12.5
12.5
0
0
0
0
0
0
0
0
0
0
0
0
-12.4
0
000
00000
12.5
12.5
12.5
0
12.5
0
0
0
0
0
0
0
0
0
-12.4
0
000
00000
12.5
12.5
0
12.5
0
12.5
0
0
0
0
0
0
0
0
-12.4
0
000
0
IC410
0
0
0
0
IC412 IC411
0
0
000
0
0
0
0
s401s401
0
0
0
0
0
0
0
0
0
0
0
s400
s400
0
0
0
0
0
0
0
0
0
0
0
s400
s400
0
0
12.5
0
IC404
0
-12.4
0
s403
0
0
IC404
0
s403
12.3
12.5
12.5
0
0
-12.3
12.5
0
IC405
0
0
-12.4
0
0
s402
s404
0
12.4
5.9
0
0.5
25.6
24.6
6.5
5.9
5.9
5.9
5.9
6.5
0
0.5
0.5
25.6 24.6
5.9
6.5
5.9
0
0.5
0.5
5.9
5.9
s403
0
0
IC405
0
s403
0
-12.2
-12.3
0
0
0
12.4
0
-12.1
12.5
-12.1
OUT L
s404
5.9
0
0.5
25.7
24.6
6.5
5.9
5.9
5.9
5.9
5.9
6.5
0
25.8
0.5
0.5
6.5
5.9
5.9
5.9
0
5.9
0.5
0.5
s401s401
0
0
0
0
0
0
0
0
0
0
0
12.5
0
IC406
0
0
-12.4
s403
0
0
IC406
0
s403
s402
s400
1.0 1.1
0
0
0
0.5
1.0
0
24.7
0
0
0.5
25.1
24.6
1.0
1.0
0.4
-0.1
-0.7
-24.6
-0.7
-25.2
-25.3
-25.7
24.7
1.0
1.0
0.4
-0.7
-0.7
-24.8
-0.7
-25.3
-25.8
25.2
24.6
1.1
25.6
1.0
0
0.5
-0.1
0
-0.7
-0.7
-25.2
25.3
24.7
1.1
1.1
1.1
0
0.5
0
-0.1
-0.7
-0.7
-25.3
-25.4
1.0
0.4
-0.2
-0.7
-25.7
25.7
1.0
0.4
-0.2
-0.7
-25.8
25.6
1.1
-0.1
-0.7
-25.7
25.7
1.1
-0.1
-0.7
-25.8
s401
0.5
11.0
11.7
11.0
0
IC414
0
0
s401
CB405
W4005
A3
Page 58
to MAIN (1)_W102
C9
-12.1
-12.1
-12.1
-12.1
-11.6
0
IC414
0
0
-10.9
10.9
CB406
Page 59
to FRONT (2)_CB504
A8
0.5
Page 58
to MAIN (2)_W202
CB403
K3
s401 s401
Page 55
to FUNCTION (1)_W3003
CB404
25.6
-12.5
12.6
12.6
0.6
0
0
-0.5
-12.5
-25.7
25.6
0.6
0
Page 61 G4
0
-0.5
-25.7
to FRONT (11)_W6
CB408
Page 55 K4
CB402
to FUNCTION (1)_W3007
7
K4
Page 55
to FUNCTION (1)_W3001
-12.5
12.6
12.6
0.6
0
0
-0.5
-12.5
W4004
K6
Page 59
to FRONT (1)_CB517
8
FUNCTION (2)
9
10
56
★ All voltages are measured with a 10MΩ/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.
IC404-406: NE5532DR
Dual low-noise operational amplifiers
1OUT
1IN–
1IN+
V
CC–
V
1
8
CC+
2OUT
2
7
2IN–
3
6
2IN+
4
5
36 pF
IN+
IN
460 Ω
37 pF
14 pF
IC404-406: LME49723MA
Dual high fidelity audio operational amplifier
V
CC+
+
OUTPUT A
1
15 Ω
7 pF
15 Ω
OUT
V
CC–
INVERTING INPUT A
NON-INVERTING
INPUT A
2
A
B
++--
3
-
4
V
V
8
OUTPUT B
7
INVERTING INPUT B
6
NON-INVERTING
5
INPUT B
IC410-412: TC94A81UG
Electronic volume control
L-MVR-AGND1
L-MVR-IN
L-ZX-AGND
L-ZX-IN
L-SW-OUT
L-SW-IN4
L-SW-IN3
L-SW-IN2
L-SW-IN1
TEST
VDD
L-MVR-AGND2
33132 31 30 29 28
34
35
36
37
38
39
40
41
42
43
45
Zero crossing
2
SS1
L-MVR-OUT
L-TVR-OUT
Latch
Latch
detection
circuit
Latch
Test and
Power ON reset
3
SS2
CS14CS2
L-TVR-IN
L-TVR-REF
R-TVR-REF
NC
27 26 25 24 23
Latch LatchLatch
Decoder
Timing
gene
5
MUTEM
Latch
24-bit shift register
Level shift
6
7
TC
GND
R-TVR-IN
Decoder
8
MUTE
R-TVR-OUT
Zero crossing
Latch
9CK10
R-MVR-AGND2
R-MVR-OUT
Latch Latch
detection
circuit
11
STB
DATA
R-MVR-AGND1
22
R-MVR-IN
21
20
R-ZX-AGND
19
R-ZX-IN
18
R-SW-OUT
17
R-SW-IN4
16
R-SW-IN3
15
R-SW-IN2
14
R-SW-IN1
NC
13
VSS
12
IC414: BA15218F
Dual high slew rate, low noise operational amplifier
OUT1
– IN1
+ IN1
1
2
1ch
+–
3
EE
V
4
VCC
8
OUT2
7
2ch
– IN2
6
–+
+ IN2
5
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