Yamaha R S300, Service Manual

Page: 58 / 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
R-S300
58
OPERATION 2/2
★
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.
CB26
CB11
W10
CB12
CB17
CB21
W2
IC1
IC2
CB6 CB7
W1A
CB26
W1A
IC3
CB2
CB13
CB19
CB14
CB25
IC4
CB9
CB8
CB4
CB16
CB3
CB10
-15.8
-15.8
-21.9
0
-15.7
-16.8
16.9
15.7
22.7
-24.0
0
5.2
5.2
4.9
10.7
10.7
0
0
4.9
4.7
0
5.0
5.1
5.6
9.2
9.2
5.6
5.6
0
9.2
6.9
5.0
5.1
0.2
0.2
0
0
0
0
0
0
0
(0)
(0)
(0)
(0)
(0)
(3.7)
(4.0)
(0)
(7.4)
(1.0)
(1.1)
(7.6)
(7.6)
(7.6)
(7.4)
(3.9)
(0)
(0)
(7.6)
(7.4) (4.0)
0
0.2
4.3
4.3
0
0
9.2
(0)
(0)
(0)
(0.2)
(7.4)
(0.2)
(0)
9.2
0.2
9.2
0
0
0.7
0
0
0
4.9
4.9
4.9
5.1
0
0.8
-24.0
22.7
-21.9
0
0
1.1
-26.2
0
1.1
15.7
-15.7
-25.5
-22.6
-22.6
0
0
-16.9
16.9
0
0
0
0
0
-15.8
-15.8
Primary side ground
AC9.1
AC4.2
AC36.6
AC8.0
IC4 : TC4013BP
Dual D-type flip flop
4 RESET1
1 Q1
6
SET1
5 DATA1
CL
3
CLOCK1
CL
CL
CL
CL
CL
2 Q1
10 RESET2
13
Q2
8 SET2
9 DATA2
7 VSS
14 VDD
11
CLOCK2
12 Q2
CL
CL
CL
CL
CL
CL
1
2
3
4 11
12
13
14
5
6
7 8
9
10
Vss SET2
CK2
VDD
Q2
INPUTS OUTPUTS
: Don't care
: Level change
˙ : No change
RESET
L
H
H
L
L
L
Q2
DATA2
RESET2
SET1
RESET1
CK1
Q1
Q1
DATA1
SET
H
L
H
L
L
L
DATA
L
H
CK Qn + 1
H
L
H
L
H
Qn˙
Qn + 1
L
H
H
H
L
Qn˙
IC1 : R1190H055B-T1-FE
Voltage regulator
V
DD
CE
Pin No.
1
2
3
5
6
Symbol
V OUT
GND
CE
GND
V
DD
Description
Output Pin
Ground Pin
Chip Enable Pin ("H" Active)
4 DELAY Delay Pin (for setting Inrush Current Limit Time)
Ground Pin
Input Pin
Vref
Thermal Shutdown
6 1
3 2,5
Inrush
Current
Limit Peak
Current
Protection
Short
Protection
V
OUT
GND
4
DELAY
OPERATION (14)
OPERATION (13)
OPERATION (12)
R model
SUB-
TRANSFORMER
POWER
TRANSFORMER
VOLTAGE SELECTOR
220V – 240V 110V – 120V
to POWER TRANSFORMER
to FUNCTION (1)_W503
Page 55 J8
to FUNCTION (1)_W502
Page 55 K8
to MAIN (1)_W103
Page 59 L2
to DOCK_W301
Page 60 L6
to OPERATION (1)_W702
Page 57 E10
to POWER TRANSFORMER
to POWER TRANSFORMER
to POWER TRANSFORMER
to POWER cable
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