Yamaha AV-S70 Service Manual page 33

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A
B
AV-S70 SCHEMATIC DIAGRAM (3/4)
1
2
VOLUME
VOLUME
3
DSP
INPUT
4.8
4.8
4.8
4.8
0.1
0
4.8
4.8
–0.7
4.8
–11.5
4
P-36
H-7
5
6
7
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
8
1SS355
2SA1037K (Q, R, S)
2SD1858 (Q, R)
S-29390AFJA
UDZ5.1B
DTA144EK
UDZ6.8B
DTC144EK
Anode
5
C
8
E
B
4
C
Cathode
B
E
1
C
D
E
0
4.7
0
3.4
0
4.8
–18.5
–19.9
–21.2
–19.8
–17.2
–17.1
–19.8
SYSTEM CONTROL
–22.5
–22.7
5.0
0
0
0
0
2.1
0
2.1
4.7
4.8
w
4.8
0
4.8
4.8
4.8
4.8
5.6
P-37
C-7
TC74HCU04AF
HD74HC153AF
M30218FCFP
80
51
81
50
9
8
14
16
7
8
100
31
1
1
1
30
F
G
P-39
17.4
J-7
CA404
17.3
–17.3
17.3
17.6
–17.6
–22.7
–21.2
–21.2
–21.2
–21.2
–21.2
–21.2
–21.2
–21.2
–21.2
–21.2
–21.2
–21.2
0
0
4.9
0
0
0
4.8
EEP
4.8
ROM
0
0.2
4.8
0
0
0.2
4.8
0
4.8
0
4.8
0
0
4.8
0
P-37
G-2
Point e (+10V : Emitter of Q706)
(RESET : Collector of Q705)
Point w (Pin 13 of IC701)
V : 2V/div (+10V), V : 2V/div (RESET)
V : 2V/div, H : 0.1 µsec/div
DC, 1 : 1 probe, H : 1 sec/div
DC, 1 : 1 probe
+10V
0V
0V
RESET
0V
AC CORD ON
H
I
J
V701 : 13-BT-169GNK (V4879700)
% 9
PATTERN AREA
PIN CONNECTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Connection
F1
F1 NP NP NX P35 P34 P33 P32 P31 P30 P29 P28 P27 P26 P25 P24 P23 P22 P21 P20 P19 P18 P17 P16 P15 P14 P13 P12 P11
Pin No.
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Connection
P10 P9
P8 P7 P6
P5 P4 P3 P2 P1 NX 1G 2G 3G 4G 5G 6G 7G 8G 9G 10G 11G 12G 13G NX NP NP F2
Note 1) F1, F2 ......... Filament
3) NX .............. No Extend Pin
5) 1G~13G ...... Grid
2) NP .............. No Pin
4) P1~P35 ....... Datum Line
GRID ASSIGNMENT
e
RESET
10.3
10.3
9.6
6.7
7.3
* 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.
AC CORD OFF
* Schematic diagram is subject to change without notice.
K
AV-S70/NX-SW70
q
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
46
47
48
49
50
51
52
53
54
55
56
57
58
59
F2
ANODE CONNECTION
38

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