Yamaha MX-D1 - Amplifier, Service Manual

Page: 37 / 53

A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
MX-D1
SCHEMATIC DIAGRAM (MAIN L, MAIN R)
37
x: NOT USED
O:USED / APPLICABLE
IC101, 115: NJM072M
Dual OP-Amp.
– +
OUT 1
–IN
1
–V
CC
+V CC
OUT
2
1
2
3
4 5
+IN 1 –IN 2
+IN
2
– +
6
7
8
IC105: NJM78M05FA
Voltage Regulator
VOUT
VIN
GND
IC106: NJM79M05FA
IC124: NJM79M15FA
Voltage Regulator
COMMON
OUTPUT
INPUT
IC109: LM61CIZ
Temperature Sensor
Vout
+Vs
GND
IC121, 122: AN7712SP-E1
Voltage Regulator
3 OUT
1
2
3
1
IN
2
COM
Starter Circuit
Output Driver
Standard Voltage
+
–
Vref
Amp.
Input Short-circuit Protection
Excessive Electric
Current Protection
Output Pass
Transistor
Overheat Protection
R1
R2
Sudden Current
Protection
INPUT
OUTPUT
COMMON
IC123: NJM78M15FA
Voltage Regulator
VDD/VCC
LEVEL
SHIFT
S
Q R Q
S
6 VS
7 HO
5 VS
9 VDD
10 HIN
IC129: IR2110
High and Low Side Driver
S
Q R
13 VSS
12 LIN
11 SD
VDD/VCC
LEVEL
SHIFT
PULSE
GEN
HV
LEVEL
SHIFT
PULSE
FILTER
UV
DETECT
R
R
3 VCC
1 LO
2 COM
UV
DETECT
DELAY
IC130: TC4053BF
Analog Multiplexers/Demultiplexers
16
11
8 7
14
12
13
2
1
X-COM
0X
1X
0Y
1Y
VEE VSS
A
VDD
10 B
I/O c O/I
I/O c O/I
I/O c O/I
I/O c O/I
5
3
0Z
1Z
9 C I/O c O/I
I/O c O/I
4
15
Z-COM
Y-COM
6 INH
LOGIC LEVEL CONVER
TER
Point 4 TP194 - R223 (Power Off)
Point 5 TP301 - D146
Point 6 TP217 - D158
Point
7
Pin 1 - 3 of IC110
Point 8 Pin 1 - 3 of IC111
Point 9 R201 - L101
★ All voltages are measured with a 10M Ω /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.
★ 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。
CAUTION!
To make the circuit operation easy to understand, the DC voltage value of each
line is indicated in each area.
Note that each common line is not necessarily a GND line.
注意！
回路動作を理解しやすくするために、各エリアごとにそれぞれの基準ラインに対するDC電
圧値を表示してあります。
それぞれの基準ラインはGNDラインとは限りませんので、ご注意ください。
P
age 35
to FUNCTION (1)
K6
P
age 35
to FUNCTION (1)
I6
P
age 35
Lch:
to FUNCTION (4)
L3
Rch:
to FUNCTION (5)
L5
P
age 35
Lch:
to FUNCTION (3)
F4
Rch:
to FUNCTION (3)
F6
P
age 35
Lch:
to FUNCTION (4)
L3
Rch:
to FUNCTION (5)
L5
ANALOG
FEEDBACK
CONTROLLER
DRIVER
DRIVER
ACTIVE POWER CONTROL
ISOLATOR
DRIVER
CROSS
FEEDBACK
Page 36
Lch: to OPERATION (1) A4
Rch: to OPERATION (1) A5
P
age 36
Lch:
to OPERA
TION (1)
M5
Rch:
to OPERA
TION (1)
M6
Common Line
基準ライン
Common Line
基準ライン
(GND Line)
Common Line
基準ライン
(OUTPUT Line)
Common Line
基準ライン
(-B Line)
Common Line
基準ライン
(GND Line)
Common Line
基準ライン
Common Line
基準ライン
14.8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
88.3
104.5
120.2
0
0
0
0
0
0
3.5
1.2
-1.6
-5.0
-5.0
5.1
2.5
-0.2
-0.1
-0.1
-1.2
-3.5
-5.0
5.1
3.3
5.0
3.9
3.3
3.3
-0.2
5.1
4.7 14.9
14.9
-15.0
-15.0 -23.5
23.4 1.0
0
0
0
0
0
0
0
0
5.1
4.2
4.9
4.4
4.4
0.1
5.1
5.4
5.7 5.7
6.4
11.4
0.1
4.4
5.0 5.0 5.1
0 0
-1.4
4.4
5.0
0 0
-1.4
11.9
11.9 11.9
11.9
119.7
119.7
119.6
118.8
119.8
119.6 119.6
120.8
120.8
120.8
120.8
120.8
120.8
120.8
120.8
119.8
119.8
4.5
4.5
4.5
4.5
5.7
5.7
11.9
11.9
11.9
11.9
0
0
4.5
5.7
5.7
5.7
4.5
4.4
4.4
0
0
0
0
0 0
0 0 0
4.5
0
0
4.4
0.1
5.1
5.4
5.8 5.8
6.4
4.2
-88.3
-104.5
-120.5
11.4
11.4
11.9 11.9
11.9
11.9
0
0
0
0
4.5
5.7
0
0
0
0
0
0
0
11.9
11.9
11.9
11.9
15.4
15.4
0.3
0.3
-119.8
0
0
0
0
0
0
0
11.4
0
2.5 5.1
1.4
0
5.1
-5.0
-5.0
0
-5.0
0
0
0
0
0
0 0
0
0
0
0
0
0
0.1
0.1
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
14.8
-15.1
0
0
0.3
10.5
10.5 12.6
-12.9
-12.9
-12.9
-10.7
-10.7
-9.9
12.6
13.9
13.9
13.9
13.9
13.9
-13.6
-13.6
-13.6
9.9
9.9
0.7
14.8 -15.1
14.8
-15.1
0
0 0.2 0.2
0 -0.1 -0.1
-5.0
5.1
0
0
0
0
4.7
4.7
5.0
5.0 23.4
-23.5
4.7
4.7
4
5
6
7
8
9
119.6
0 0
0 0
23.4
-23.5
271.2 271.2
135.8
135.8
141.4
141.2
136.7
136.7
135.8
32.9
32.9
32.9
32.9
0
0
0
0
0.2
4.7
0
0.4
0
5.5
15.5
150.8
141.2
150.8 136.7 15.5
15.5
0
0 0
5.9
6.2
5.5
5.5 5.5
15.5
15.5
15.5
13.5
15.5
13.5
0.7
0
0.7
0
15.5
15.5
6.2
6.2
5.9
5.9
10.2
14.8
14.8
14.8
14.8