Yamaha R-S300 Service Manual page 58

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