Yamaha R S300, Service Manual

Page: 59 / 76

A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
59
MAIN
R-S300
★
All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★
Components having special characteristics are marked ⚠ and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
W103
CB105
IC102
IC102
W104 W102
CB107
IC101
CB101
W105
SUBWOOFER OUT
OUT L
OUT L
AC67.3
AC50.6
26.5
0.3
0.3
0
5.0
26.5
0.3
0.3
0
5.0
29.4
29.4
0 0
1.1
-26.2
29.4
0
0
-26.2 0.2
29.4 -0.4
0
0
-46.2
(-34.5)
46.2
(34.5)
46.1
46.2
0
0.7
37.7
37.1
0
0
0
0
0.7
-45.6
-0.3
1.2
1.2
0.6
46.2
-1.0
-46.2
-0.4
0.6
0
46.2
-0.4
-46.2
0
0
0
0
0
0
0
45.9
-1.0
-0.4
-46.2
1.1
46.2
0.6
-0.4
0
-46.2
0.6
46.2
0
0
0
0
0
0
45.9
1.0
5.0
0
0 0
0
0
-15.5 15.5
0
0
0
0
0
1.0
1.0
1.8 5.0
5.0 5.0 -15.5 1.0
4.6
0
0 0
0 0 0 0 15.7 -15.6
5.0
5.0
-1.0
1.2
-1.0
-0.3
-1.1
1.1
-1.0
1.1
0
0.7
-44.8
0
0
0
0
0
-45.6
0.7
37.2
37.8
46.2
0.7
37.8
0
-44.8
0.7
-44.8
-45.4
-1.0
-44.8
-1.0
-45.4
37.1
46.2
-15.5
0
0
-15.5
0
0
IC101 : LM61CIZ
Temperature sensor
V+
–INPUT
+INPUT
V–
OUTPUT
IC102 : NJM4580E
Dual operational amplifier
8
2, 6
3, 5
1, 7
4
Notes)
Safety measures
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t/PUFUIBUUIFDBQBDJUPSTJOEJDBUFECFMPXBSFEBOHFSPVTFWFOBGUFSUIFQPXFSJTUVSOFEPGGCFDBVTFBOFMFDUSJDDIBSHFSFNBJOTBOEBIJHIWPMUBHFDPOUJOVFTUPFYJTU
UIFSF
#FGPSFTUBSUJOHBOZSFQBJSXPSLDPOOFDUBEJTDIBSHJOHSFTJTUPS LPINT8UPUIFUFSNJOBMTPGFBDIDBQBDJUPSJOEJDBUFECFMPXUPEJTDIBSHFFMFDUSJDJUZ5IFUJNF
SFRVJSFEGPSEJTDIBSHJOHJTBCPVUTFDPOETQFSFBDI
$$PO."*/ 1$#
5 k-ohms
10 W
5 k-ohms
10 W
SPEAKERS
IMPEDANCE
SELECTOR
LOW HIGH
A
B
A
B
ON/OFF
OUT
SUBWOOFER
POWER
MANAGEMENT
MAIN (1)
MAIN (2)
MAIN (3)
Note) Those parts marked with “#” are not included in the P.C.B. ass’y.
#
#
#
#
to POWER TRANSFORMER
to OPERATION (6)_CB706
Page 57 J8
to OPERATION (2)_W803
Page 57 E5
to FUNCTION (1)_CB506
Page 55 L4
to OPERATION (2)_CB805
Page 57 F4
to OPERATION (13)_CB26
Page 58 G2
sXX LOC UC R A G L
s101 TE101 WU98700
MST-224VD-03
WU98700
MST-224VD-03
WU98700
MST-224VD-03
WU98720
MST-224VD-03
WU98720
MST-224VD-03
s102 TE102 WU98690
MST-224VD-02
WU98690
MST-224VD-02
WU98690
MST-224VD-02
WU98710
MST-224VD-02
WU98710
MST-224VD-02
s103 C153
C154
C156
C157
C158
C159 X X WN16530
0.01/100
WJ61020
0.01/100
WN16530
0.01/100
s104
s120
s121
s122
s123
s124
C150
Destination Part List
C151
WJ61140
0.1/100 (J)
WJ61100
0.047/100 WJ61100
0.047/100 WJ61080
0.033/100 WJ61100
0.047/100
C115 UR27833
330/63
UR27833
330/63
UR27833
330/63
UR07847
470/63
UR27833
330/63
C124
C127 UR26747
47/50
UR26747
47/50
UR26747
47/50
UR34810
100/25
UR26747
47/50
C133 UR81810
100/6.3
UR81810
100/6.3
UR81810
100/6.3
UR03810
100/16
UR81810
100/6.3
C155 X X X WJ60890
1000P/100
X
C167 US163100
1000P/50
US163100
1000P/50
US163100
1000P/50
X US163100
1000P/50
s
120
s
121
s
121
s
122
s
123
s
124