Yamaha RX-V550 Service Manual page 83

A B C
SCHEMATIC DIAGRAM (POWER)
1
2
POWER AMP.
FRONT L
3
4
5
6
7
SURROUND L
8
CENTER
9
10
# All voltages are measured with a 10MΩ/V DC electronic volt meter.
★ 電圧は、内部抵抗10MΩの電圧計で測定したものです。
# 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. ★ 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。
D E F
1.0
5.0
0
54.0
53.5
1.1
54.6
53.5
0
0
-0.6
-0.6 0
54.0
53.5
1.1
53.5 54.6
0
0
-0.6 -0.6 0
54.0
53.5
1.1
53.5 54.6
0 0
-0.6 -0.6
54.0
53.5
1.1
53.5 54.6
0 0
-0.6 -0.6
54.0
53.5
1.1
53.5 54.6
0
0
-0.6 -0.6
Page 82 A5 Page 82 A5
to MAIN (1) to MAIN (1)
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。
G H
11.8 19.1 5.0 11.2 4.9 11.2
0 0 0
0 0
-11.7 -20.0 -4.9 -11.9
IC301: LM61CIZ IC302: NJM7812FA
Temperature Sensor Voltage Regulator
+Vs
Vout
GND
IC303: NJM79M12FA
IC305: NJM79M05FA
Voltage Regulator
54.0
53.5
1.1
53.5 54.6
0
0
-0.6 -0.6
Page 82 A1
to MAIN (1)
I J K
19.1
AC30.4
-0.1
-0.1
-20.0 to Power
Transformer
AC18.3
11.2
0
0
-11.9
Page 82 F7
to MAIN (1)
IC304, 306: NJM7805FA
Voltage Regulator
INPUT INPUT
OUTPUT
OUTPUT
COMMON
COMMON
COMMON
OUTPUT
INPUT
Page 84 G2
to SUBTRANS
L M N
RX-V550/HTR-5750/RX-V450/HTR-5740/DSP-AX450
RX-550/HTR-5750
U, C, T, K R L A, B, G, E
(WC83940) (WC83950) (WD07280) (WC83960)
s1 SW291 X WB49370 WD07370 X
s2 CB291 X V937780 V937780 X
s3 CB292 X V937790 V937790 X
s4 CB293, 294 X WC05070 WC05070 X
s5 W291 X V941190 V941190 X
s6 F3 X T4AL250V T4AL250V X
KB00079 KB00079
s7 C360 6800/25 6800/25 6800/25 6800/25
RX-V450/HTR-5740/DSP-AX450
J, U, C, T, K R L A, B, G, E
(WC83970) (WC83980) (WD07290) (WC83990)
s1 SW291 X WB49370 WD07370 X
s2 CB291 X V937780 V937780 X
s3 CB292 X V937790 V937790 X
s4 CB293, 294 X VP20650 VP20650 X
s5 W291 X V941190 V941190 X
s6 F3 X T4AL250V T4AL250V X
KB00079 KB00079
s7 C360 4700/25 4700/25 4700/25 4700/25
x: NOT USED
O: USED / APPLICABLE
[R, L models only]
to Power Transformer
83