Sw-Avs70 Schematic Diagram - Yamaha AV-S70 Service Manual

A B

SW-AVS70 SCHEMATIC DIAGRAM

1 Q Q
3 7 6 3 1 5 1 5 0
REAR L
11.9
0
0
–11.7
0
2
0
0
0
3
11.9
0
11.7
0
0
–11.6
4
0
0
T E
L 1 3 9 4 2 2 9 6 5 1 3
5
SW
6
7
w w w
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
8
1SS133 RBV-602 2SC1740S (Q, R, S) 2SA970 (GR, BL)
MTZJ5.6B DTC114ESA 2SC2240 (GR, BL)
2SC2878 (A, B) .
Anode
–
B E
C
Cathode C
+ B
E
C D E
27.5
0
0
0
0
–0.1
–29.3
0
–26.3
0
0 –11.5
11.7
0
0
0
–11.6
0 0
0
0
0
0
–11.5 0
0
11.7 0
0
0
0
0
0
–11.6
29.1
Z
Z
Z
12.0
0
0
0
2.4
0
Z
–11.9
–29.3
Z
x a o
y
2SK304 (E) AN78N12 NJM79M12FA NJM78M05FA
NJM79M15FA NJM78M12FA
i NJM78M15FA
D
G 1:INPUT 1:COMMON 1: OUTPUT
S 2:COMMON
2:INPUT 2: COMMON
1 2
3:OUTPUT 3 2 3 2
3 3:OUTPUT 3: INPUT
1 1
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8
0
0
0
0
0
0
0
28.8
0
0
27.6
–0.1
0
0
0
0
–0.1
–29.3
11.7
0
–1.5
0
0
Q Q
3 7 6 3
5.0
0
5.0
0
–11.9
0
0
0.2 0
11.9
Z
11.2
27.1
0 0 11.9
0
29.2
11.9
0
AC68.7
u 1 6 3
µ
IC101~105 : PC4570HA
µPC4570HA
STK408-040E
Dual OP-Amp
.
1 2
9 2 0
– + + –
1 2 3 4 5 6 7 8
1 V CC V O1 –Vm 1 +Vm 1 V EE +Vm 2 –Vm 2 V O2
1
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H I
2 4
9 9
SW
26.1
27.5
WH
26.3
RE
0
23.4
0
0
1 5 1 5 0 8 9 2
REAR L
9.0
9.0
0 0 0
11.0
11.0
0
Z
Z 250V 1.6A
IC109 : STK408-040E
3 Channel AF Power Amp
m
+
–
c o
THERMAL CH.2
SENSOR
CH.3
+ +
– –
SUB
CH.1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
9
V CC
J K
AV-S70/NX-SW70
2
8 9 9
4 9 8 2 9 9
11.0
Z
Z
* All voltage are measured with a 10MΩ/V DC electric volt meter.
* Components having special characteristics are marked Z and
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
40