Yamaha R S300, Service Manual

Page: 57 / 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
57
OPERATION 1/2
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.
CB806
CB901 CB803
CB805
W801
CB801
CB807
IC801
IC801
IC802
IC802
IC901
IC901
IC901
CB902 CB951
W851
CB706
JK701
CB804
W803
W802
W704B
W705
W703A
W703B
W702
W704A W701B
W701A
CB701
IC701
0
0
0
0
0
0
0
0
0
0
0
15.7
-15.6
-15.5
0
5.0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15.7
-15.6
0
0
0
0
0
0
0
-15.2
-15.2
15.7
-15.6
0
0
0
0
0
15.7
-15.6
0 0 0 0
15.7
0
0
0
-15.6
0
0
0
0
0
0
0
0
0
5.0
5.0
0
0
0
0
0
5.0
5.0
5.0
0
-21.9
-15.8 -15.8
0
5.0
5.0
5.0
5.0
0
0
0
0
0
5.0
5.0
5.0
0
5.0
5.0
5.0
-15.9
-17.5 -19.0 -19.0 -19.0 -19.0 -21.8 -21.8 -21.8 -21.8 -18.9 -18.9 -18.9 -16.2
-19.0
-18.9 -16.2 -19.0 -18.9 -18.9 -16.1 -16.1 -18.9 5.0 -14.7 -20.3 -20.3
-21.8
-18.9 -16.2 -16.1
-20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -21.9
-18.9 -17.5 -19.0 -19.0 -14.7 -21.8 -21.8 -21.8 -19.0 -19.0 -18.9 -19.0 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4 -19.5 -15.9
-17.5
-17.5
-21.8
-21.8
-21.8
-19.0
-19.0
-19.0
-19.0
-16.2
-19.0
-21.9
-17.5
5.0
2.2
2.2
0
0
5.0
5.0
5.0
-19.0
-14.7
-21.8
-21.8
-21.8
0
-19.5
-19.5
-19.5
-19.5
-21.3
-21.3 -21.1
-19.0
-19.0
5.0
5.0
5.0 0
0 0 0 0
5.0
-21.1
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
0
0
0
5.0
0
0
0
0
0
-20.4
-19.0
-19.0
-18.7
-19.0
-18.9
-20.4 -17.5 -19.0 -16.1 -16.2 -18.9 -20.3 -20.3 -14.7 -16.1 -16.1
0
5.0
5.0
1.2
0.6
0
5.0 3.1
5.0
0
0
0
0
OUT L
TONE OUT
TONE IN
VOL OUT
FM MODE
U, C, R, A, L
IC802, 901 : NJM2068MD-TE2
Dual operational amplifier
OUT 1
OUT
2
–IN
1
+IN
1
+IN
2
-IN 2
–V
CC
+V
CC 1
2
3
4
8
7
6
5
+ – + –
52
Display
controller
Serial
receive
circuit
Digit
output
circuit
Clock
generator
DIG11/
SEG42
51
DIG12/
SEG41
50
DIG13/
SEG40
49
DIG14/
SEG39
48
DIG15/
SEG38
47
DIG16/
SEG37
46
DIG17/
SEG36
45 SEG35
XOUT 6
Vcc1 8
Vcc2 18
Vss 5
Vp 64
XIN 7
CS
SCK 3
SDATA 4
RESET 1
SEG00 44
9 SEG34
SEG26 17
19 SEG25 Segment
output
circuit
Display code
RAM
(8-bit x 60)
CGROM
(35-bit x 166)
CGROM
(35-bit x 16)
code
select
Code
write
Code/
command
control
circuit
DIG00 63
53 DIG10
IC701 : M66003-0131FP-R
18 digit 5 x 7 segment VFD controller/driver
2
data
timing
clock
dot data
write
scan pulse
Segment/
Digit
select/
output
circuit
PHONES
LOUDNESS
TREBLE BASS
INPUT
BALANCE
VOLUME
OPERATION (8)
OPERATION (7)
OPERATION (4)
OPERATION (3)
OPERATION (1)
OPERATION (2)
OPERATION (6)
OPERATION (5)
OPERATION (10)
OPERATION (11)
PURE DIRECT
indicator
POWER
indicator
PURE DIRECT
SPEAKERS
A B
VFD DRIVER
(power)
to FUNCTION (1)_CB504
Page 55 H2
to FUNCTION (2)_W401
Page 55 D8
to FUNCTION (1)_CB505
Page 55 J2
to FUNCTION (1)_CB513
Page 55 L3
to MAIN (1)_CB101
Page 59 A8
to MAIN (1)_W104
Page 59 K10
to FUNCTION (1)_CB503
Page 55 I2
to OPERATION (13)_CB11
Page 58 B2
to MAIN (1)_W105
Page 59 A4
(For service)
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Ohm 0 + 1.0 k + 1.0 k + 1.5 k + 2.2 k + 3.3 k + 4.7 k
V 0 – 0.22 0.23 – 0.64 0.65 – 1.06 1.07 – 1.55 1.56 – 2.09 2.10 – 2.62 2.63 – 3.94
A/D conversion
value
(5.0 V=255)
0 – 11 12 – 32 33 – 54 55 – 79 80 – 107 108 – 134 135 – 156
KEY1
(94 pin of the
microprocessor)
PRESET
<
PRESET
>
FM AM TUNING << TUNING >> –
Ohm 0 + 1.0 k + 1.0 k + 1.5 k + 2.2 k + 3.3 k + 4.7 k
V 0 – 0.22 0.23 – 0.64 0.65 – 1.06 1.07 – 1.55 1.56 – 2.09 2.10 – 2.62 2.63 – 3.94
A/D conversion
value
(5.0 V=255)
0 – 11 12 – 32 33 – 54 55 – 79 80 – 107 108 – 134 135 – 156
KEY0
(95 pin of the
microprocessor)
DIMMER
(U, C, R, A, L models)
FM MODE
INFO
MEMORY CLEAR –
SPEAKERS
A
SPEAKERS
B
TP (G model)
Destination Part List
P.C.B. sXX LOC UC R A G L
(12) s11 C7 WJ36120
0.047/400 WD05420
0.047/630 WJ36120
0.047/400 WJ36120
0.047/400 WJ36120
0.047/400
s12 C10 WB69630
0.1/400
WF08150
0.047/630 (J)
WF08150
0.047/630 (J)
WF08150
0.047/630 (J)
WF08150
0.047/630 (J)
s13 C12 X WD04730
3300/50
X X X
s14 C14 UU24933
3300/25
X UU24933
3300/25
UU24933
3300/25
UU24933
3300/25
(14) s15 CB8
CB9 X WN10300
TP00351-31
X X X
s16 CB10 X V937790
4P
X X X
(12) s17 D15 X WS69820
HZU15B3 TRF-E
X X X
(13) s18 D23 X WS70040
HZU30B
X X X
(14) s19 F4 X VV07160
2.5A250V X X X
(12) s20 J9 X X X X X
s21 J10 VN50000
.
X VN50000
.
VN50000
.
VN50000
.
s22 Q9 WC52940
KTC3875S (Y)
X WC52940
KTC3875S (Y)
WC52940
KTC3875S (Y)
WC52940
KTC3875S (Y)
s23 R12 RD35747
47K
X RD35747
47K
RD35747
47K
RD35747
47K
(13) s24 R40 X RD35710
10K
X X X
(12) s25 R45 X HV75322
2.2
X X X
(14) s26 SW1 X VZ07550
SL14-22AM5F
X X X
(12) s28 F1 WB22110
5.00A125V
WB22110
5.00A125V
VV07160
2.5A250V VV07160
2.5A250V VV07160
2.5A250V
s29 T1 YC772A0
YC772
YC773A0
YC773
YC774A0
YC774
YC774A0
YC774
YD161A0
YD161
(13) s41 C29
C30 WN16530
0.01/100
WN16530
0.01/100
WN16530
0.01/100
WJ61020
0.01/100
WN16530
0.01/100
(13) s30 C31
C32 UR04968
6800/25
UR25947
4700/35
UR25947
4700/35
UR04968
6800/25
UR25947
4700/35
s42 C37
C38 UR04833
330/25
UR04833
330/25
UR04833
330/25
UR04847
470/25
UR04833
330/25
(2) s43 C815
C816 UR03810
100/16
UR03810
100/16
UR03810
100/16
UR03822
220/16
UR03810
100/16
(13) s45 D20
D21 WS69850
HZU16B2 WS69850
HZU16B2 WS69850
HZU16B2 VU17310
UDZS16B
WS69850
HZU16B2
s46
s47
s48
s49
s50
D22 WS69980
HZU22B3 WS69980
HZU22B3 WS69980
HZU22B3 VU17340
UDZS22B
WS69980
HZU22B3
(2) CB807 X X X VL84470
3P
X
(12) C6 WJ60500
0.01/50 (J)
WJ60500
0.01/50 (J)
WJ60500
0.01/50 (J)
WJ61020
0.01/100
WJ60500
0.01/50 (J)
(6) C728
C729
C730 WJ60500
0.01/50 (J)
WJ60500
0.01/50 (J)
WJ60500
0.01/50 (J)
WJ61020
0.01/100
WJ60500
0.01/50 (J)
(2) IC802 X3505A0
NJM2068MD
X3505A0
NJM2068MD
X3505A0
NJM2068MD
X9127A0
NJM5532M
X3505A0
NJM2068MD
s49
s49
s49
s50
s47
s50