Yamaha AX-496, Руководство по обслуживанию

Страница: 21 / 42

A
1
2
3
4
5
6
7
8
9
B C D E F G H I J K L
AX-396
28
SCHEMATIC DIAGRAM
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
BC
E
2SA1695
2SC4466 2SA1145
2SA970
2SC2705
2SC1815
2SA1015
2SC2240
2SA893A
2SC1890A S4VB20 2SA1358 2SC4488 2SD1915F
2SC1740S
DTC144ES
2SA933S
E E
C
C
B
B
E
C B
+
–
~
~
E
C
B
DIODES
Anode
Cathode
NJM2068LD
1
8
LB1641 LC78211
1
10
TC4053BP
1
8
16
M37478M4-408SP
1
21
42
1
15
30
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
8 7 6 5 4 3 2 1
OUT
1
–
Vcc
+IN
2
–
IN
2
OUT
2
+Vcc
+IN
1
–
IN
1
NJM2068LD
LC78211
TC4053BP
LB1641
AX-396
★
All voltage are measured with a 10M
W
/V DC electric volt meter.
★ Components having special characteristics are marked
s
and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
Point
1
and
2
Emitter of Q108
Collector of Q104
Point
3
Pin 20 of IC101
To MAIN (1)
see page 29
To MAIN (1)
see page 29
To/From MAIN (3)
see page 29
12.5
-12.5
14.2
-14.1
0
0
0
0
0
0
0
0
0
0
0
0
0
-0.8 4.8 5.5
5.5 15.3
0
0
0
0
0.7
0.7
0
0
0 0 0 0
0 0
0
0
0 0 0
0
0 0
0 2.2 2.2
0 0
-9.1
-9.1
9.1
9.1
0.2
0
0
0
0
0 0 0
0
0
0
0
16.4
16.4
-14.5
0
0 0
0
0
0 0
0 0
0 0 0
0
0 0
0.5
0.7 0.3 0.7
0 1.7
15.2 15.2
0
0
0
0
0
0
-14.2
14.3
0
0
0
0
0
0
0
0
0
0
0
-14.3
-14.3
14.4
14.4
0
0
0
0
0
0
4.8
4.7
0.7
0.7
9.3 9.8
-1.0
-1.3
-4.9
14.6
14.6
0
0
0
0
0
1
2
0
6.0
6.0
5.4
5.4
5.4
4.8
4.7
6.4
6.4
7.1
10.7
11.4 11.3
11.4
4.7
4.8
4.7 4.7
4.7
4.8
4.7
4.7 4.7 4.7
4.8 4.8 4.7 4.8 4.8 4.7
4.7 4.7 0.9
1.7
4.7
4.7
4.8 4.8 0.2 4.8 4.8
4.8
2.1 2.3 0
0
0
0
0.9
0.6
0
0
0
0
0 0
0
3
1.7
4.8
4.8 4.8 4.8 4.8 4.8 4.8
4.7
4.8
4.8 2.9 4.8 4.8
4.8
CD/DVD DIRECT
AMP OFF
CD/DVD DIRECT AMP ON
CD/DVD DIRECT
AMP OFF
PHONO EQ AMP
CD BUFFER
INPUT SELECTOR
MOTOR DRIVER
SYSTEM
CONTROL
RESET
PROTECTION
VOLUME AMP
TONE CONTROL AMP
8
7
5
6
8
7
5
6
2
1
4
3
2
1
4
3
8
7
5
6
2
3
4
1