Service manual

ABCDEFGH I J
1
2
3
4
5
6
7
A-S700
29
PHONES
SPEAKERS
C871,872
JK801
C121,122
SPEAKER B
RELAY
SPEAKER A
RELAY
HP RELAY
A
B
RY101
RY102
RY103 R177,178
POWER
AMP
C119,120
C143
C144
+B
–B
G
D116-119
–22V
+LB
–LB
G
C160C161
SW101
SW101
D120
R171
R172
G
Q102
–VP
C803
+
D110
ACL
ACL
ACH
ACH
ACL2
R227
ACL2
ACL
Q254
D275
T251
D259
POWER
DETECTOR
/RESET
Q252
POWER RELAY
+5.5V
IC601
Q605
G
+5S
+5M
+5BU
D605
D604
D603
POWER SAVE
RY251
s10
C261
IC251,252,253
D114
POWER RELAY
HP RELAY
SPEAKER B RELAY
SPEAKER A RELAY
70
18,63,65
MUTE CONTROL
81
66
67
POWER SAVE
PURE DIRECT ON
CD DIRECT ON
55-60
INPUT INDICATORS
72
76
77
MICROPROCESSOR
M30302
IC602
XL601
16MHz
13
15
LINE1
LINE2
RY251
F252
F251/J252
TE251
MUTE
CONTROL
MUTING
Q815,816
NJU7313AM
19,22,25
8,9,12
25,26 REC A
23,24 REC B
3,28
2,29
4,27
11,20
5,26
7,24
10,21
1,2
3,4
5,6
9,10
11,12
13,14
7,8
INA
INB
INC
INE
INF
ING
IND
SWITCH
IC501
INPUT
IC804
IC805
IC505
IC506
IC507
IC508
PHONO EQ
ATT
11dB
PHONO
TUNER
CD
LINE2
PB
LINE3
PB
LINE1
PRI
80
PRV
90
PRD
91
THML
92
THMR
93
POWER DETECT
20
/RESET
12
IR REMOTE
AC IN
POWER
TRANSFORMER
IMPEDANCE SELECTOR
HIGH/LOW
U801
IC101 IC102
VOLUME UP/DOWN
IC806
INPUT SELECTOR
SW803
D801-809
94
84,85
78,79
REC OUT
SW805
89
74
75
SPEAKER OFF/A/B
SW804
POWER SW
SW806
19
POWER INDICATOR
D810
REC OUT SELECTOR
BD3841FS
IC502
REC OUT
CD DIRECT AMP SW801
ON
CD DIRECT IN
MUTING
Q804,805
OFF
CD DIRECT ON
MUTE CONTROL
VIN
ON
OFF
IC801
VOUT
ON
PDOUT
PURE DIRECT
ON
OFF
VOLUME
VR805
VR801-804
SW802
OFF
TIN-
TIN+
MIX IN
IC802
PURE DIRECT ON
TONE CONTROL
BALANCE
LOUDNESS
TOUT
MUTE CONTROL
MUTING
Q802,803
MAIN
• See page 47 →
SCHEMATIC DIAGRAM
FUNCTION
• See page 45 →
SCHEMATIC DIAGRAM
OPERATION
• See page 46 →
SCHEMATIC DIAGRAM
OPERATION
• See page 46 →
SCHEMATIC DIAGRAM
OPERATION
• See page 46 →
SCHEMATIC DIAGRAM
OPERATION
• See page 46 →
SCHEMATIC DIAGRAM
■ BLOCK DIAGRAM