Sw-P240 Schematic Diagram - Yamaha NS-P240 Service Manual

Home theater sound speaker system
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B
NS-P240/NS-P246

SW-P240 SCHEMATIC DIAGRAM

1
0
0
0
2
3
IC1, 2, 7 : KIA4558P
Dual OP-Amp
OUT
1
1
8
+V
CC
–IN
2
7
OUT
1
2
+
+
+IN
3
6
–IN
1
2
–V
4
5
+IN
CC
2
4
5
MAIN (3)
10
6
C
11.6
0
0
0
0
0
5KA
15K
SLR-56MG
MAIN (2)
AC25.2
AC25.2
D
E
MAIN (1)
LIMITTER
0
0
-11.6
0
PROTECTION
34.2
34.2
11.6
-34.4
-11.6
F
POWER AMP
11.6
0
0
0
0
0
0
-11.6
-11.6
0
0
0
0.5
0
0
11.6
IC3 : TA7317P
Protector
8
9
Muting
Constant voltage
circuit
power supply circuit
Power supply
ON/OFF
detecting circuit
1
Schmidt
Overcurrent
OR circuit
circuit
detecting circuit
Discharging
2
Current voltage
Substrate
circuit
detecting circuit
3
7
4
5
GND
* All voltages are measured with a 10M Ω /V DC electronic volt meter.
* Components having special characteristics are marked Z and
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
* 電圧は、内部抵抗10MΩの電圧計で測定したものです。
* Z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
0
0
IC4 : STK404-050
Power Amp
TR7
TR6
R1
R4
TR1
TR2
R5
TR8
Relay drive
6
C2
circuit
C1
R2
TR5
D1
TR3
R3
R6
TR4
SUB
1
2
3
4
5
6
7
8
9
10

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Ns-p246

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