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
57
MAIN 4/4
R-1330/NS-BP400
IC504
IC503
IC501
IC501
W301B
W301D
IC502
0
0
0 0 0
0
0
0
0
-4.8
0
4.9
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-4.8
0
0
0 0 0 0
0 0 0
0
0
0
0
0
0
-11.6
0
0
-11.6
4.9
5.0
-3.1 0
4.9
4.4
5.0
5.0
5.0 5.0
5.0 5.0 5.0
-2.4 -2.3
-4.8
0
0
0
-4.8
-4.8
-4.8 -4.8 -3.1
3.1
-4.8
-2.7 5.0
4.9
0 0 0 0 0 0
0
0
0
0
0
0
0
4.9
-4.8
-4.2
-4.2
-4.2
3.1
0
-2.4
-4.8
0
0
-2.4
-4.8
-4.8
4.4
4.9
4.9
0
5.0
4.8
10.0
10.0
10.0
-4.8
10.0
-4.8
0
-5.7
0
0
-4.3
-4.6
-4.8
-4.8
-4.8
5.3
5.3
5.5
5.4
4.8
5.4
5.4
-4.8
12.0
5.4
5.4
5.4
5.4 5.4
5.4
0
0
0
0
0
0
-10.6
-43.1
-43.7
-43.8
4.8
0
5.0
0.2
-5.7
0
0
0
0.2
0
4.8
0
4.8
0.2
0.2
-43.7
-37.1
0 0
-37.7
0
6.2
44.3 44.3
44.3
5.6
14.5
-28.2
5.4
5.4
-4.8
-38.6
-42.2
-33.1
-2.4
7.3
14.5
0
-28.7
-37.2
-43.7
6.2
9.0
14.5
14.5
5.6
-43.7
-37.1
0 0
-37.7
0
6.2
44.3 44.3
-28.2
2.7
2.7
3.3
2.5
29.8
-28.2
-27.6
-27.6
-47.3
0
44.3
5.6
-28.2
5.4
5.4
-4.8
-38.6
-42.5
-33.0
-2.4
7.3
14.5
0
-28.7
-37.2
-43.7
6.2
9.0
14.4
14.5
5.6
0
0
0
4.9
4.8
4.9
0
12.0
5.0
5.0
-4.8
12.0
11.7
0
0
0
0
5.0
-11.7
-4.8
-4.8
L OUT
POINT D XL501 (Pin 27 of IC502)
D
A
+ + - -
1 OUTPUT A
INVERTING INPUT A
NON-INVERTING
INPUT A
V-
B
2
3
4
8 V+
OUTPUT B
INVERTING INPUT B
NON-INVERTING
INPUT B
7
6
5
IC501 : LME49723MA
Dual high fidelity audio operational amplifier
IC503, 504 : IRS20957STRPBF
PIC
UV
DETECT
FLOATING INPUT
FLOATING HIGH SIDE
VDD
IN
10.2V
VSS
CSD
LO
VS
VCC
COM
CHARGE/
DISCHARGE
UV
DETECT
1
3
4
2
HV
LEVEL
SHIFT
HV
LEVEL
SHIFT
HV
LEVEL
SHIFT
UV
HIGH
SIDE
CS
Q
5V REG
20.4V
1
5.3V
HV
LEVEL
SHIFT
HV
LEVEL
SHIFT
INPUT
LOGIC
PROTECTION
CONTROL
UV
DETECT
DEDA-TIME
LOW SIDE CS
5.1V REFERENCE
SD DT
9
10
13
HO 14
VB 15
CSH
16
11
OCSET 7
VREF 6
DT 8
IC502 : YDA140-SZ
3 ch D class amp PWM modulation controller
analog FB
circuit
Various senser
circuit
digital FB
circuit
CLOCK
circuit
DC3AV
Loop gain
Control
circuit
Digital
circuit
DETH_A
AYINP_A
MCKIO
MOSOUT
A
SPOUT
A
DETLA
HIP_A
LOP_A
AXINM_A
AYINM_A
+70V
DETL_A
DETH_A
DTIME1
DTIME0
SELMP
REFR
AVSS_A
AXOUT_A
AXCRC_A
AXINM_A
AGND_A
AYOUT_A
AYINM_A
AYINP_A
AVDD_A
AVSS_B AVDD_C
PWLMT
ERROUT
ERRIN
MUTEN
MSSEL
DVDD
MCKIO
DGND
DVSS
SEL_C
SEL_B
SEL_A
SELCLIP
XO
XI
AX
OUT_B
AX
CRC_B
AX
CRC_C
AXINM_B AXINM_C
AG
N
D
_
B
AG
N
D
_
C
A
Y
OUT_B
A
Y
OUT_C
AX
OUT_C
PVSS_C LO
P
_
C
HIP_C PGND_C PVSS_C HIP_B PGND_B PVSS_B LO
P
_
B
HIP_A PGND_A DETL_C DETH_C DETL_B DETH_B LO
P
_
A
A
YINM_B
A
YINM_C
A
YINP_B
A
YINP_C
A
VDD_B
A
VSS_C
-70V
Driver IC
PWM
generation
circuit
analog FB
circuit
digital FB
circuit
Loop gain
Control
circuit
Digital
circuit
DETH_B
AYINP_B
MOSOUTB SPOUTB
DETLB
HIP_B
LOP_B
AXINM_B
AYINM_B
+70V
-70V
Driver IC
analog FB
circuit
digital FB
circuit
Loop gain
Control
circuit
Digital
circuit
DETH_C
AYINP_C
MOSOUTC SPOUTC
DETLC
HIP_C
LOP_C
AXINM_C
AYINM_C
+70V
-70V
Driver IC
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
PWM
generation
circuit
PWM
generation
circuit
to MAIN (1)_W301A
Page 56 M4
to MAIN (1)_W301C
Page 57 M5
to MAIN 1/4
to MAIN 1/4
SPEAKERS
MAIN (1)
MODULATOR
DRIVER
DRIVER