Schematic Diagram - Yamaha AX-496 Service Manual

A B

SCHEMATIC DIAGRAM

1
PHONO EQ AMP
12.6
0 5 8
0
7
0 6
2
2
0
1 0
0 3
4
-12.7
14.2
0 5 8
7 0
0
6
CD BUFFER
3
0 2
1 0
0 3
4
-14.3
4
0
0
0
CD/DVD DIRECT
AMP OFF 0
5
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 0
6
INPUT SELECTOR
14.7 14.7
14.7 14.7
0
7
4.8
-14.8
-14.8
0 0
0
8
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SD1915F 2SA1145 2SC4488
2SC1740S 2SA970
DTC144ES 2SC2705
2SA933S 2SC1815
2SA1015
2SC2240
2SA893A
2SC1890A
E
E E
C B
C
B
9
C D E
0 0 0
0
CD/DVD DIRECT AMP ON
0.7
0 0
0
0.7
0
0 0
0
0
0
0
0
0
0 0
MOTOR DRIVER
4.8
0
2SA1358 2SA1695 S4VB20 DIODES
2SC4466
Anode
–
~
~
+
B Cathode
C B
C
B C
E
E
F G
AX-496
14.2
0
0
0
0
0 0
-14.2
VOLUME AMP
SYSTEM
CONTROL
0.9
0
0.6
0
0
NJM2068LD LB1641 TC4053BP LC78211
10
8
8
16
30
1
1 1
1
H I
To MAIN (1)
see page 27
0.1
0.1
-0.1
-0.1
CD/DVD DIRECT AMP &
PURE DIRECT OFF
PROTECTION
14.6
-2.0
4.8 -5.0
14.6
0
4.8
To MAIN (1)
-1.7 0
see page 27
0.7
0
To/From MAIN (3)
see page 27
5.4 12.8
5.4
4.7
6.1
4.8
5.4
2
6.1
3
4.8 0
1
0 12.8 12.8
12.1
1.7 0 0
6.5
6.5
0
0
0
RESET
4.8 4.7
LC78211
NJM2068LD
1 2 3 4 5 6 7 8
M37478M4-408SP
All voltage are measured with a 10MW/V DC electric volt meter.
Components having special characteristics are marked s and must be replaced
21 with parts having specifications equal to those originally installed.
Schematic diagram is subject to change without notice.
15
42
1
J K L
AX-496
TONE CONTROL AMP
14.3
0
14.3
0 5 8
7
6 0
0
0
0
2
0
1
3 4
-14.3
0
-14.3
Point 1 and 2
Emitter of Q108
Collector of Q104
Point 3
Pin 20 of IC101
LB1641
3 2 8 10 9 7
4 VZ
IN 1 5 INPUT LOGIC IN 2
6
GND
1
26