Block Diagram - Yamaha A-S801 Service Manual

A B
A-S801

■ 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
−
UNBAL → BAL
6dB
3
CD Direct IN
INL/R 14(SL/SR IN2) →CD L±
INL/R 15(SW/C IN2)→CD R±
Digital
IC303
PCM5101APWR
DAC
DIGITAL
4
• See page 57-58→
OPTICAL IC301
PCM9211PTR
SCHEMATIC
DIR
COAXIAL DIAGRAM
39 40
XL301
24.576MHz
FUNCTION
• See page 59-60 →
SCHEMATIC DIAGRAM
5
NJM4580E(TE2)
MUTE
SUBWOOFER
OUT
MAIN 90Hz/12dB oct
• See page 63-64 →
SCHEMATIC DIAGRAM
6
7
36
C D
IC401
Volume
Zone2
(+24dB ∼-95dB/0.5dBstep)
L,R
Zone2 L,R
SL,SR
CD L±
2ch
VOL IC
SUB2 OUT
SUB2 L,R SUB2 L,R CD R±
(REC4と同端子) C,SW
Multi1
Zone2 L,R
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
SERIAL
DATA
IC502
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
100
POWER POWER
MANAGEMENT MANAGEMENT
Operation Key
Volume
IR Unit
E F
OPERATION
• See page 61-62 →
SCHEMATIC DIAGRAM
CD DirectL ± or
SL,SR OUT 0dB
BAL → UNBAL
Zone2 L,R OUT
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
POWER AMP
+B
OPERATION
DISPLAY
-B
IR REMOTE
SW501
CD Direct/ Phono EQ/SW PREOUT AMP
SELECTOR
IC306
TUNER
DAC Analog
+5T
+3.3A
(A-S301∼701)
CD Direct/ Phono EQ/SW PREOUT AMP
SELECTOR
G H
MAIN
• See page 63-64 →
SPEAKER OUT
SCHEMATIC DIAGRAM
CD DIRECT AMP
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 TRANSFOMER
D111
Q6
+7V
VOLTAGE SELECTOR [R]
D14
-7V
Q7
I J
＋
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