Yamaha AX-397, Service Manual

Page: 21 / 36

A B C D E F G H
1
2
3
4
5
6
I J K
7
8
AX-397
21
■
SCHEMATIC DIAGRAM (FUNCTION)
* 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。
IC302, 501, 502, 531, 532:
NJM2068MD-TE
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
IC453: TC4053BP
Triple 2 Channel Analog Multiplexers/Demultiplexers
IC452: NJU7312AM
Analog Function Switch
2
3
4
5
6
7
8
9
10
11
12
14
30
1
29
28
27
25
24
23
22
21
20
19
17
15
CONTROL
LEVEL
SHIFTER
LA
TCH
LEVEL
SHIFTER
LA
TCH
L1
L2
L3
L4
L-COM1
L5
L6
L-COM2
L7
L8
L-COM3
ST
VDD
VEE
13 NC
R1
R2
R3
R4
R-COM1
R5
R6
R-COM2
R7
R8
R-COM3
DATA
CK
VSS
18 NC
16
26
CD/DVD DIRECT AMP ON
CD/DVD DIRECT AMP OFF
CD/DVD DIRECT AMP ON
CD/DVD DIRECT AMP OFF
TO MAIN (1) W2 Page 22 B-6
TO MAIN (2) W151
Page 22 I-1
TO MAIN (3) CB201
Page 22 A-4
TO MAIN (1) CB1
Page 22 B-3
TO MAIN (5) CB221
Page 22 A-1
TO MAIN (6) CB226
Page 22 A-2
15.0
0
0 0
14.0
14.1 14.1
14.0
0.1 0.1
0 0
15.5 15.5
0
0.1
-14.7
-13.2
13.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 0
0
0 0.6
0.8
0.8 0.6
0.4
0.4
0
1.4
1.4
15.2
15.2
0
0 0 0
0 0 0
0 0 0 0
0
0
0 0 0 0
0 0 0
0 0 0
0 0
15.6
-15.7
0
9.6
9.6
9.6
9.6
9.6
-9.5
-9.5
0
0
0.7
0.7
0
0
0
0
2.1 5.1
2.1 5.1
2.1 0.2
2.1 5.1
2.1 5.1
2.1 5.1
5.0 5.0
5.0
5.0
0
0
0
0
0
0
6.9
0
0 0
0
0
0.2 0.2
0.1 0.1
1.0 1.0 1.7 5.0 5.0 0 5.0 5.0 5.0 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1
5.1 5.0 0 0 0 0 0 0 1.7 1.7 0.1
0
5.0 5.0
5.0 2.2 2.4 0
5.0
5.0
4.9
0
5.0
0.1
0.1
0.1
0
0
0
0
0
0
0
0
-14.5
0
0.2
0.2
-14.5
14.8
14.8
0.1
0.1 14.7
0.1
0.1
-14.2
5.0
5.0
5.0 -6.9
4.3
1.7
0.7
6.3
6.3
6.3
5.7
5.7
5.1
6.9
12.1
12.1
12.1
11.4
7.3
5.0
5.0
5.0 1
2
CH1
2
CH2
IC421: LB1641
Motor Driver
2 3
P1
5 IN 1
1
GND
4 VZ
6
IN 2
OUT
1
8
VCC 2
10
OUT
2
9
P2
INPUT LOGIC
PRE DRIVER
7
VCC 1
16
VDD
LOGIC LEVEL
CONVER
TER
12
OX
7
VEE
6 INH
OUT C IN
13 IX OUT C IN
2 OY OUT C IN
1 IY OUT C IN
5
OZ
OUT C IN
3 IZ OUT C IN
4 Z-COMMON
15
14 X-COMMON
Y-COMMON
9
C
10 B
11 A
8
VSS
INHIBIT
(Pin 6)
L
L
L
L
L
L
L
L
H
CONTROL INPUTS “ON” CHANNEL
0X (Pin 12), 0Y (Pin 2), 0Z (Pin 5)
1X (Pin 13), 1Y (Pin 1), 1Z (Pin 3)
0X, 0Y, 0Z
1X, 0Y, 0Z
0X, 1Y, 0Z
1X, 1Y, 0Z
0X, 0Y, 1Z
1X, 0Y, 1Z
0X, 1Y, 1Z
1X, 1Y, 1Z
NOTE
C
(Pin 9)
L
L
L
L
H
H
H
H
*
B
(Pin 10)
L
L
H
H
L
L
H
H
*
A
(Pin 11)
L
H
L
H
L
H
L
H
*
* Don’t Care
Point
w
CH 1 : Emitter of Q309
CH 2 : Collector of Q304
↑
AC POWER ON
(Connect the power cable)
↑
AC POWER OFF
(Disconnect the power cable)
↑
AC POWER ON
(Connect the power cable)
Point
q
(Pin 20 of IC301)