How it Works
Yamaha
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A-S2000
Service Manual
90 pgs15.06 Mb0
User Manual [ru]
212 pgs4.4 Mb0
User Manual
7 pgs1.23 Mb0
Owners Manual
60 pgs18.31 Mb0
User Manual
33 pgs12.98 Mb0
Schematic
9 pgs5.45 Mb0
Owners manual
43 pgs13.26 Mb0

Yamaha AS-2000 Schematic

ABCDEFGH I J
1
■ BLOCK DIAGRAM
A-S2000
BALANCE
FRONT
2
• See page 64-66 → SCHEMATIC DIAGRAM
3
4
• See page 59 → SCHEMATIC DIAGRAM
CD BAL L/R
RY101
PHONO
L/R
RY_MMHC
CD L/R
TUNER L/R
LINE1 L/R
LINE2 PB L/R
LINE2 REC OUT L/R
PRE OUT
MAIN IN
HOT (POSITIVE PHASE)
COLD ( NEGAT IVE PHASE )
Q1001-1016
MC
HEAD AMP
RY102
MM/MC
Q1017-1038
EQ AMP
IC301
BUFFER AMP.
RY_PHONO
POL/POR
RY103
RY_CD
RY_TU
RY_L1
RY_L2
BUFFER AMP.
RY UNBAL
IC201
INPUT BUFFER
HOT(+)
COLD(-)
INPUT SELECTOR
RY_BAL
RY306
RY305
HOT(+)
COLD(- )
VOLUME & TONE CONTROL
IC410
ATT.1
IC411
ATT.2
IC412
ATT.3
IC407
ATT.4
IC408
ATT.5
IC409
ATT.6
IC404
IC405
IC406
IC401
IC402
IC403
TONE CONT ROL DEVICES
FLAT
TONE CONT ROL DEVICES
FLAT
FUNCTION
RY_BYP
RY402
RY401
LINE AMP.
IC413
IC302
IC303
• See page 60-62 → 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
PRD PRI THM
RY501
FRONT
SPCH A L/R CH
RY201/R111
SPCH B L/R CH
RY202/R112
RY_SPA RY_SPB
to POWER AMP.
• See page 64-66 → SCHEMATIC DIAGRAM
SPEAKERS L/R CH
+
A
-
+
B
-
R CH
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
HPTRIM
SP_AB
6
HP_PRD48PSVA147PSVA2
1,64
62,63
IC502
MICRO
PROCESSOR
46
IC501
14
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
BALANCEBASSTRIM
REMOTE
7
FRONT
• See page 64-66 → SCHEMATIC DIAGRAM
FRONT PANEL
INPUT SEL
VOLUME
VR501
FUNCTION
• See page 60-62 → 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 63 → SCHEMATIC DIAGRAM
FUNCTION
• See page 60-62 → SCHEMATIC DIAGRAM
37
A
BCDEFGH I JK
L MN
SCHEMATIC DIAGRAMS
A-S2000
BALANCE
1
2
25.2
24.6
5.8
5.8
3
0
0.3
6.4
6.4
0.3
25.7
5.8
5.8
0.3
24.6
-24.5
0.6
0
1.0
-24.5
-25.0
-25.7
-0.8
1.0
0.4 1.0
-0.2
-25.1
CD BAL L
25.7
1.0
0.4
-0.2
-0.8
-25.4
CD BAL L
W2001
CB203
Page 66
H2
to FRONT (12)_CB59
Page 62
H8
to FUNCTION (3)_W3
-24.5
-25.7
0.5
24.6
0
-25.0
1.0
25.2
1.0
-0.8
-24.5
0.4
1.0
-25.1
1.0
-0.8
25.7
-0.3
-25.4
0.4
0
0
IC201
12.6
0
-12.5
4
JK202
24.6
5.8
5.8
0
0.3
6.3
6.3
0.3
25.7
5.8
5.8
0
0.3
5
Page 60 K2
to FUNCTION (1)_W3005
6
CB201
25.2
25.7
24.7
0.6
1.0
1.0
1.0
0.4
-0.2
0
-0.8
-25.1
-24.5
1.0
-0.8
0.4
-0.3
-25.4
24.7
7
5.8
5.8
0
0.3
CD BAL R
6.3
25.7
5.8
5.8
0.3
-25.7
0
-24.5
-25.0
0
0
IC201
0
-11.9
CB202
IC201: NJM2068MD-TE2 Dual operational amplifier
-11.9
Page 60 K2
to FUNCTION (1)_W3006
OUT1
–IN1
+IN1
–VCC
1
2
+–+
3
4
+VCC
8
OUT2
7
–
6
-IN2
5
+IN2
8
25.2
25.7
1.0
0.4
-0.2
-0.7
-25.4
-24.5
24.7
0
0.5
-24.5
-25.0
1.0
1.0
0.4 1.0
-0.2
-0.7
-25.1
JK201
9
24.7
5.8
5.8
0
0.3
6.4
6.4
0.3
25.7
5.8
5.8
0
0.3
10
-25.7
★ 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.
59
A-S2000
A
BCDEFGH I JK
L MN
1
FUNCTION 1/3
W3006
CD BAL L
Page 59
2
W3005
25.1
-24.5
-24.8
24.6
1.1
25.7
1.1
0.5
-0.1
-0.6
-0.6
0.9
0.3
0
-0.9
-25.6
25.7
1.1
0.6
0
-0.6
-25.6
24.6
25.7
24.6
6.4
CD L
3
Page 65
to FRONT (10)_W1002
M5
CB301
12.0
-11.9
5.8
5.8
5.8
0
0.3
0.3
5.8
0
0.3
0.1
0.3
24.6
5.8
25.6
6.3
5.8
0.3
0.3
0.9
0.9
0.9
1.0
0
0.2
1.1
-24.5
-0.4
-0.9
-0.9 -25.0
-25.6
0.5
0
0
4
25.7
0
-11.9
-11.9
W3003
IN L
25.7
0.6
0.6
W3001
to BALANCE_CB202
Page 59
to BALANCE_CB201
Page 61
to FUNCTION (2)_CB403
I7
I5
J4
-11.9
-11.9
25.1
24.6
25.7
5
-11.8
-11.9
6
-11.9
-11.9
24.6
6.4
5.8
5.8
5.8
0
0.3
0.3
5.8
0
25.7
5.8
0.3
0.1
0.3
0.3
1.3
24.6
6.3
5.8
0.3
0.9
0.9
0.9
0.1
0.3
-0.3
0
-0.9
-0.9
-24.5
24.6
25.2
1.1
25.7
-0.9
0.9
0.3
0.3
-25.6
1.1
0.5
1.1
0.5
0.5
0
0
-0.6
-0.6
-25.1
-24.8
-24.5
1.1
-0.6
25.7
0.5
0
-25.6
-11.9
-11.9
0
-25.6
0.5
-25.6
0.5
Page 61 B6
to FUNCTION (2)_CB402
W3002
Page 61
B5
to FUNCTION (2)_CB401
-25.5
LINE 2
0
7
-11.8
0
0
-11.8
0
8
12.6
0
IC301
0
0
0
IC301
0
0
-12.5
0
0
0
0
0
0
12.6
IC302
IC302
-12.5
12.6
IC303
0
IC301: NJM2068MD-TE2
W3004
0
0
Page 64
B5
Dual operational amplifier
OUT1
–IN1
+IN1
–VCC
1
2
+–+
3
4
8
7
–
6
5
+VCC
OUT2
-IN2
+IN2
to FRONT (1)_CB519
0
0
0
0
-11.8
9
0
-11.8
0
0
0
0
0
-11.8
-11.8
IC303
-12.6
0
CB305
Page 65 B5
IC302, 303: OP275GSR Dual bipolar/JFET, audio operational amplifier
1
OUT A
2
-IN A
3
+IN A -IN B
4
V-
8
7
6
5
V+
OUT B
+IN B
to FRONT (10)_W1003
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.
60
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