Yamaha AX-596, Service Manual, Page: 13 / 26

A
1
2
3
4
5
6
7
8
9
B C D E F G H I J K L
AX-596
★ All voltage are measured with a 10MΩ /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.
16
SCHEMATIC DIAGRAM
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SC1815
2SA1015
2SC1890A
2SC4488 2SD1915F
2SC1740S
DTC114ES
DTC144ES
2SA933S
E E
C
C
B
B
E C
B
DIODES
Anode
Cathode
NJM2068LD
NJM4558L
1
8
LB1641 LC78211
1
10
M34748E8SP
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 / NJM4558LD
LC78211
Point 1 and 2
Emitter of Q322
Base of Q316
Point 3
Pin 20 of IC308
LB1641
1
2
3
4
5
6
7
8
9
10
11
30
29
28
27
26
25
24
23
22
21
20
19
16
12
18
17
14
15
13
LEVEL SHIFTER
LATCH
CONTROL
SHIFT REGISTER
ZZ
ZZ
ZZ
L1
L2
L3
L4
LCOM1
L5
L6
L7
L8
RES
S
V
DD
V SS
V
EE
LCOM2
LCOM3
R1
R2
R3
R4
RCOM1
RCOM2
RCOM3
R5
R7
R8
D1
CL
CE
R6
With the POWER switch
turned ON, connect the
power cord to the AC outlet.
Disconnect the power cord
from the AC outlet.
To MAIN (1)
see page 17
CD/DVD DIRECT
AMP OFF
CD/DVD DIRECT
AMP ON
CD/DVD DIRECT AMP &
PURE DIRECT OFF
To MAIN (1)
see page 17
To/From MAIN (1)
see page 17
K
4
G
1 1
3
2
12.7
0
0
0
0
0
0
0
0
0 0
0
0
0
0
-12.8
13.0
13.1
-13.0
-13.0
-13.0
-13.1
-13.6
-13.6
-13.6
-13.6
13.8
13.8
13.5
13.5
12.9
12.9
0.1
0.1
0.1
0.1
-0.6
-0.6
-0.6
0.6
0.6 0.6
0.6
-0.6
0
0
0
0
0.7
0.7
12.9
12.9
12.9
-13.0
-13.0
-13.0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
12.9
-13.0
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 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
0 0 0 0
4.8
4.8
14.8
14.5
14.5
14.8 14.8
-14.7
-14.7
0
0
0 0
11.8 9.9
0.7 0.4
0 0.5 0.7 0.5
1.7 1.7
17.4 17.4
11.8 12.4 13.0
0
0 0
0
0
0
13.7
-13.8
0
0
0.1
0.1
0.1
0.1
13.4
-14.5
0
-0.1
0
0.7
4.9
4.8
14.5
14.6
14.6
14.6
0
0
0
0
0
0
0 0
0
0 4.8
4.8
4.9 4.4 0 4.8
4.8 4.8 4.8 4.8 4.8 0.1 4.8
4.8
4.4 4.6
4.8
4.8 4.8 4.8
4.9 4.9 2.2 2.4 2.9 0.6 1.7 4.8
0
0
0 0
0.6
0.6
0.5
0.4
9.9
1.7
1.0
0
0
14.6
14.5
13.9
4.8
4.8
4.8 4.8 4.8 2.6 4.8 4.8
4.4
4.4
4.4 4.4 4.4 4.4 4.4 4.4
4.4
4.4
0
4.9
0
0
0
6.1
6.6 7.3
13.8 13.7
13.1
6.1
5.5
5.5
5.5
5.5
5.5
5.5
-14.6
4.9
4.8
4.8
4.8
13.6
0
0
0
0
0
0
0
0
0
0
14.1
-14.2
-14.6
INPUT SELECTOR
CD BUFFER
PHONO EQ AMP
MOTOR DRIVER
SYSTEM
CONTROL
RESET
PROTECTION
MUTING
VOLUME AMP
TONE CONTROL AMP
PHONES
SPEAKERS
A B