Yamaha RX-V557 Service Manual page 87

A B C
SCHEMATIC DIAGRAM (POWER)
1
2
RX-457/HTR-5840/DSP-AX457 models
3
RX-557/HTR-5850/DSP-AX557 models
4
53.3
52.7
1.0
FRONT L
52.7 53.8
0
0
-0.6
-0.6 0
5
53.3
52.7
1.0
52.7 53.8
0
0
-0.6
-0.6 0
53.3
6
52.7
1.0
52.7 53.8
0
0
-0.6 -0.6
53.3
7
52.7
1.0
52.7 53.8
0
0
-0.6 -0.6
SURROUND L
53.3
8
52.7
1.0
CENTER
52.7 53.8
0
0
-0.6 -0.6
9
10
# All voltages are measured with a 10MΩ/V DC electronic volt meter.
# Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
# Schematic diagram is subject to change without notice.
D E F
12.0 18.9 5.0 10.3
0 0
1.0
5.0
0
0
-12.0 -20.1
12.0 18.9 5.0 10.3
0 0
1.0
5.0
0
0
-12.0 -20.1
53.3
52.7
1.0
52.7 53.8
0
0
-0.6 -0.6
Page 86 A4 Page 86 A4 Page 86 A1
to MAIN (1) to MAIN (1) to MAIN (1)
★ 電圧は、内部抵抗10MΩの電圧計で測定したものです。
★ s 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ございます。
G H
19.0
AC30.4
-0.1
-0.1
-20.1
10.3
3.3
0 to POWER TRANSFORMER
AC18.5
10.3
-0.2
0.2
-11.9
Page 86 E6
to MAIN (1)
19.0
AC30.4
-0.1
-0.1
-20.1
10.3
3.3
0 to POWER TRANSFORMER
AC18.5
10.3
-0.2
0.2
-11.9
Page 86 E6
to MAIN (1)
Page 91 G8
to CONVERSION
POWER (1) POWER (2)
I J K
IC301: LM61CIZ
Temperature Sensor
+Vs
Vout
GND
IC302: NJM7812FA
IC304: NJM7805FA
Voltage Regulator
INPUT
OUTPUT
COMMON
IC303: NJM79M12FA
IC305: NJM79M05FA
Voltage Regulator
COMMON
OUTPUT
INPUT
IC306: NJM2388F
LOW DROPOUT VOLTAGE REGULATOR WITH ON/OFF CONTROL
Vin 1 2 Vout
Bandgrap
+
Reference
-
ON/OFF
Cont 4
control
Over Voltage Thermal Over Current
Protection Protection Protection
GND 3
L M N
RX-V557/HTR-5850/DSP-AX557/RX-V457/HTR-5840/DSP-AX457
87