Block Diagram - Yamaha A-S500 Service Manual

A B

■ BLOCK DIAGRAM

1
→
FUNCTION
SCHEMATIC DIAGRAM
2
IC601
EQ AMP
PHONO
NJM2068MD-TE2
3
CD
DOCK
DOCK
→
+5V
SCHEMATIC DIAGRAM
NJM4580E
PB
(IN)
LINE2
REC
(OUT)
4
PB
(IN)
LINE3
REC
(OUT)
LINE1
TUNER
5
MUTE
SUBWOOFER
OUT
–60 →
MAIN
SCHEMATIC DIAGRAM
6
7
C D
OPERATION
PURE DIRECT
IC401
56
57 INPUT SELECTOR
SW801
VOLUME
14
16
VR951 VR903
58
MOTOR DRIVEN
59
VOLUME
IC309 VR851
REC OUT SELECTOR
62
(A-S500)
63
INH 1
+15
M
78
INH 2
79
76 DRIVER
REC
77
IC851
LB1641-E
74
75
72
73
80
81
MICROPROCESSOR
64
65
IC103
SERIAL DATA
NJM4580E
L+R
LPF
90Hz/12dB oct
POWER
MANAGEMENT
SP A/B REC
A-S500 model
E F
A-S500 A-S300
→
SCHEMATIC DIAGRAM
MUTE
IC802
PRE AMP
IC901
0 dB
0.5-1.0 dB
TONE CONTROL
VR902 VR901
I / DC / THERMAL PROTECTION
OUTLET RELAY (J model)
POWER RELAY
IC1
5.6V
MICROPROCESSOR
IC502
IR RECEIVER
STBY IND
A/D
R5F364A6NFA
POWER AMP
100
OPERATION
DISPLAY
IR REMOTE
SW501
PRE AMP
INPUT VOLUME Q406
SELECTOR
DIRECT Q407
SW
SELECTOR
PRE AMP
G H
SPEAKERS
POWER AMP
SP A Lch
29.0dB
SP B Lch
L CH
SP A Rch
SP B Rch
HEADPHONE
SPEAKER
RELAY
R CH
RY104
A
RY105
B
Q128
RY103
Q126
HEADPHONE Q136
RELAY
POWER RELAY (J model)
SUB-TRANSFORMER
RY2
T1
OUTLET
(J model)
TE1
D24
DB105
POWER RELAY
MAIN
IMPEDANCE SELECTOR
TRANSFORMER
SW101
F1 RY1
+B
C134
D111
C135
-B
220-240
110-120
Q6
+15V
SW1
VOLTAGE SELECTOR
+7V
D14
Q7
+7V
-15V D26
I J
A-S500/A-S300
A
B
A
B
MAIN
–60 →
SCHEMATIC DIAGRAM
PHONES
JK701
AC IN
(R model)
+5V
DOCK
PORT
35