Yamaha NS-BP400, Руководство по обслуживанию

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★
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.
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
● ⚠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。
A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
R-1330/NS-BP400
56
MAIN 3/4
IC306
IC306
IC302
IC302
IC301
IC301
IC303
IC305
W301A
W301C
0
0
0
0
0
0
0
0
0
0 0 0
5.0 5.0 5.0
2.1
0 7.0 7.0 6.8
0
2.1
0 0 0 0 0 0 0 0 0
-6.8
7.0
0 0 0 0
0
0
0 0 0
5.0 5.0
-2.0
7.6
7.0
7.6
0
0
0
12.0
0 0
0
-11.7
0
0
0
12.0
0
0
0
-11.3
0
0
0
11.6
0
0
0
-11.7
0
-11.6
0
0
-11.6
0
0
0
-6.8
-7.4
-11.7
IPOD IN
CD IN
L OUT
IC301, 306 : NJM2068MD
Dual operational amplifier
OUT
1
OUT
2
–IN
1
+IN
1
+IN
2
-IN
2
–V
CC
+V
CC
1
2
3
4
8
7
6
5
+ – + –
InA1
1
InA2 InA3 InA4 InA5 InA6 InA7 InA8 InA9
8dB to 3dB
/0.5dBstep
8dB to 3dB
/0.5dBstep
Gain
Gain
50k ohms
x18
GND OutA1 OutA2 OutA3 LATCH DATA CLOCK
InB1 InB2 InB3 InB4 InB5 InB6 InB7 InB8 InB9 GND OutA1 OutB2 OutB3 ADR V+ V-
IC303 : NJW1111V
9-in 3-out stereo audio selector
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Control Logic
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
8dB to 3dB
/0.5dBstep
Gain
8dB to 3dB
/0.5dBstep
Gain
8dB to 3dB
/0.5dBstep
Gain
8dB to 3dB
/0.5dBstep
Gain
InA1
Bias Control Logic
IC305 : NJW1194V
2-channel electronic volume input selector and tone control
InA2
InA3
InA4
InB1
InB2
InB3
InB4
OutB
OutA
V- V+ GND
Ach Tone Filter
ADR0 ADR1 DATA CLOCK LATCH
Zero Cross Detection
V-
Bch Tone Filter
InA1 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
InA2
InA3
InA4
GND
GND
GND
Tone_Ba2a Tone_Ba2b
Tone_Ba1b
Tone_Tr1b
GND
GND
GND
InB4
InB3
InB2
InB1
V-
V+
ADR0
ADR1
OutB
DCCAP_B
Tone_Ba1a
Tone_Tra
OutA
VDDOUT
LATCH
DATA
DLOCK
DCCAP_A
TONE
TONE
V+
–INPUT
+INPUT
V–
OUTPUT
IC302 : NJM4580E
Dual operational amplifier
8
2, 6
3, 5
1, 7
4
to MAIN 1/4
to MAIN 1/4
INPUT
OUTPUT
SUBWOOFER
MAIN (1)
SELECTOR
E VOLUME
PHONO EQ
to MAIN (1)_W301B
Page 57 B3
to MAIN (1)_W301D
Page 57 B3