Yamaha R-S300 Service Manual page 60

A B C
R-S300
DOCK
1
2
3
No replacement part available.
DOCK
4
0
5.1
4.6
0
0
0
0
0
0
0
0
0
0
0
0
5
0
0
0
5.1
0
0
5.1
0
0
0 0
6
7
8
9
10
★ 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.
60
D E F
5.3
IC301
0
0
0
IC304
15.0
0
0
IC309
0
0
IC309
0 0
-15.1
IC302
CB302
Page 55 I8
to FUNCTION (1)_CB511
G H I
Page 55 L6
to FUNCTION (1)_CB508
1.1
0 0 4.9
IC311
0
4.9
5.1
IC306
IC306
J K L
5.5
0
5.3
5.1
4.6
4.6 4.6 4.6
0
0
5.0
0
11.2
Page 58
0
to OPERATION (12)_CB21
W301
W302
M N
IC301: TC7SET32FU
2-input OR gate
IN B 1 5 V
CC
IN A 2
GND 3 4 OUT Y
IC309: NJM4580E
Dual operational amplifier
V+
8
2, 6 1, 7 OUTPUT
–INPUT
+INPUT
3, 5
V–
4
IC311: NJM2388F05
Low dropout voltage regulator with ON/OFF control
V V
IN OUT
Bandgap
Reference
ON/OFF
Cont
control
Over Voltage Thermal Over Current
Protection Protection Protection
GND
C7