Yamaha A-S500 Service Manual page 56

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A
B
C
A-S500/A-S300
OPERATION 2/2
1
2
3
4
5
AC8.4
CB17
10.2
to POWER TRANSFORMER
4.3
4.7
10.2
0
0
6
7
OPERATION (1)
8
9
10
56
D
E
F
CB21
Page 61
L7
to DOCK_W301
G
H
I
A-S300
OPERATION (7)
R model
CB10
220V – 240V
110V – 120V
VOLTAGE SELECTOR
to POWER TRANSFORMER
5.2
5.6
CB2
4.7
5.0
9.2
5.6
5.1
5.6
5.6
9.2
0
0
9.2
IC1
Page 53
J8
to FUNCTION (1)_W503
IC1: R1190H055B-T1-FE
Voltage regulator
Thermal Shutdown
V
V
DD
6
1
OUT
Vref
Inrush
Peak
Short
Current
Current
Protection
Limit
Protection
CE
3
2,5
GND
4
DELAY
Pin No.
Symbol
Description
1
V
OUT
Output Pin
2
GND
Ground Pin
3
CE
Chip Enable Pin ("H" Active)
4
DELAY
Delay Pin (for setting Inrush Current Limit Time)
5
GND
Ground Pin
6
V
Input Pin
DD
J
K
TRANSFORMER
to AC IN
Page 55
B6
W1A
to OPERATION (2)_W809A, W809B
(J model)
W1B
5.1
5.0
(7.5)
(1.1)
(7.5)
5.0
0.2
5.1
5.0
(3.6)
0.2
0
(3.2)
5.0
(1.0)
(7.5)
(7.3)
0
IC2
0
0.2
0
(0)
0
0
(0)
(3.2)
(0)
0
0
(0)
9.2
Primary side ground
3.6
7.0
0.2
(7.3)
IC3
0
0
0.7
0.2
0
(0)
0
0.8
0
IC4: TC4013BP
Dual D-type flip flop
RESET1
4
SET1
6
1
Q1
DATA1
5
2
Q1
CL
CL
CL
CL
3
CLOCK1
CL
CL
Q1
1
14
VDD
10
RESET2
SET2
8
Q1
2
13
Q2
13
Q2
9
CK1
3
12
DATA2
Q2
12
Q2
CL
CL
4
11
RESET1
CK2
CL
CL
5
DATA1
10
RESET2
CLOCK2
11
CL
CL
SET1
6
9
DATA2
7
V
SS
Vss
7
8
SET2
VDD
14
★ 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.
L
M
N
POWER
to POWER TRANSFORMER
(U, C, R, T, A, B, G, L models)
Page 59
B2
to MAIN (5)_CB8
(J model)
(0.2)
(0.2)
(7.3)
(0)
(0)
(0)
(0)
SUB-
TRANSFORMER
(7.5)
AC9.1
(0)
(3.6)
(0)
(7.3)
0
(0)
4.4
4.5
9.2
9.2
0
INPUTS
OUTPUTS
RESET
SET
DATA
CK
Qn + 1
Qn + 1
L
H
H
L
H
L
L
H
H
H
H
H
L
L
L
L
H
: Don't care
L
L
H
H
L
: Level change
L
L
Qn˙
Qn˙
˙ : No change
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
● 本回路図は標準回路図です。改良のため予告なく変更することがあります。

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