Schematic Diagram - Yamaha AX-397 Service Manual

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