Yamaha AX-496 Manual de servicio - Página 19
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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