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Block Diagram - Yamaha A-S501 Service Manual

Integrated amplifier
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A
B

■ BLOCK DIAGRAM

1
IC601
VOL IC
NJM2068MD-TE2
EQ AMP
EQ AMP
IC402
YD953A0
PHONO
REC OUT suppression
REC OUT suppression
TUNER
LINE1
LINE2 IN
(REC)
OUT
INPUT SELECTOR
2
LINE3 IN
Zone2 L,R
(REC)
OUT
CD
IN14
IN15
3
CD Direct IN
INL/R 14(SL/SR IN2)
INL/R 15(SW/C IN2)
CD R
Digital
IC303
PCM5101APWR
DAC
DIGITAL
4
• See page 61 →
OPTICAL
IC301
PCM9211PTR
SCHEMATIC
DIR
COAXIAL
DIAGRAM
39
40
XL301
24.576MHz
FUNCTION
• See page 62-63 →
SCHEMATIC DIAGRAM
5
NJM4580E(TE2)
MUTE
SUBWOOFER
OUT
MAIN
90Hz/12dB oct
• See page 66-69→
SCHEMATIC DIAGRAM
6
7
C
D
Volume
(+24dB
-95dB/0.5dBstep)
Zone2 L,R
SL,SR
CD L
SUB2 OUT
SUB2 L,R
SUB2 L,R
CD R
(REC4と同端子)
C,SW
Multi1
0dB
SL,SR IN
VOL L,R
FL,FR
FL,FR
Main L,R
CD Direct
SBL,SBR
SBL,SBR
SBL,SBR
Multi2 SL/SR/C/SW IN2
(SL/SR IN2
CD L
, SW/C IN2 CD R )
Logic
CD L
SERIAL
DATA
MOTOR DRIVEN
MOTOR DRIVEN
VOLUME
VOLUME
(A-Sx01)
(A-Sx01)
MICROPROCESSOR
YG398A0
A/D
IC103
+5MTR
+5MTR
L+R
(+5V)
(+5V)
LPF
M
M
DRIVER
DRIVER
POWER
POWER
MANAGEMENT
MANAGEMENT
Operation Key
Volume
IR Unit
E
F
A-S501
A-S301
OPERATION
• See page 64-65 →
SCHEMATIC DIAGRAM
SL,SR OUT 0dB
C,SW OUT 0dB
CD Direct R OUT
FL,FR OUT 0dB
VOL L,R OUT
TONE
16.5dB
-12dB
+ +
-6dB
VOL L, R OUT
SBL,SBR OUT 0dB
LOUDNESS
L,R OUT
min
Multi1
LOUDNESS
SBL,SBR IN
L,R
LOUDNESS素子
I / DC / THERMAL PROTECTION
HP DETECTION
POWER RELAY
IC1
+5M
+5M
Q507
+5S
+5S
A/D
IC502
POWER AMP
+B
100
OPERATION
-B
IR REMOTE
SW501
CD Direct/ Phono EQ/SW PREOUT AMP
SELECTOR
DAC Analog
(A-S301∼701)
CD Direct/ Phono EQ/SW PREOUT AMP
SELECTOR
G
H
MAIN
• See page 66-69 →
SCHEMATIC DIAGRAM
SP A Lch
POWER AMP
29.0dB
SP B Lch
MUTE
SP A Rch
SP B Rch
HEAD PHONE
SPEAKER
RY101
RELAY
A
RY102
Q126
B
RY103
HEAD PHONE
Q128
Q136
HEAD PHONE
RELAY
SUB TRANSFORMER
RY1
D24
Q2
POWER RELAY
IMPEDANCE SELECTOR
SW101
MAIN TRANSFORMER
D111
Q6
+7V
VOLTAGE SELECTOR [R]
D14
IC306
+3.3A
-7V
Q7
I
J
A-S501/A-S301
SPEAKER OUT
A
L CH
B
A
R CH
B
AC IN
110-120・220-
240V/50・60Hz
220-240
110-120
IC302, IC309
OPTICAL/M-VOL DRIVER
+5V
+5V
DC OUT
for YBA-11+5V /500mA
IC305
DIR
+3.3D
+3.3D
/DAC Digital
37

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