Yamaha AX-496 Service Manual page 21

A B
SCHEMATIC DIAGRAM
1
PHONO EQ AMP
12.5
0 5 8
0
7
0 6
2
0 2
1 0
0 3
4
-12.5
14.2
0 5 8
7 0
0 6
CD BUFFER
3
0 2
1 0
0 3
4
-14.1
4
0
0
0
CD/DVD DIRECT
AMP OFF
0
5
0 0 0
0
0
0
0
0
0
0 0 0
6
INPUT SELECTOR
16.4
16.4
7
-14.5 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
-0.8 4.8 5.5
0
5.5 15.3
CD/DVD DIRECT AMP ON
0.7
0.7
0 0
0 0
0 0 0
0 0
0
0 0
0
0
0
0 0.2
0
0
0 0 0
9.1
0
0
-9.1
0
0
MOTOR DRIVER
0 0
2SA1358 2SA1695 S4VB20 DIODES
2SC4466
Anode
–
~
~
+
B Cathode
C B
C
B C
E
E
F G
AX-396
14.3
0
0
0
0
0
0
-14.2
VOLUME AMP
CD/DVD DIRECT
AMP OFF
9.8 9.3
SYSTEM
0
CONTROL
0.9
0
0.6
0
0
NJM2068LD
1 2 3 4 5 6 7 8
NJM2068LD LB1641 TC4053BP LC78211
10
8
8
16
30
1
1 1
1
H I
To MAIN (1)
see page 29
0
0
0
0
PROTECTION
14.6
4.7
-1.3 -4.9
14.6
0
4.8
0
-1.0
To MAIN (1)
see page 29
0.7 0
0.7
To/From MAIN (3)
0 see page 29
0
5.4 11.4
4.7 5.4
6.0
4.8
5.4
2
6.0
3
4.7 0
1
0 11.3 11.4
10.7
1.7 0 0
7.1
6.4
6.4
0
0
0
RESET
4.7 4.8
LC78211
LB1641
3 2 8 10 9 7
4 VZ
IN 1 INPUT LOGIC IN 2
5 6
GND 1
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.
15
Schematic diagram is subject to change without notice.
42
1
J K L
AX-396
TONE CONTROL AMP
14.4
0
14.4
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
TC4053BP
28