Panasonic SA-AK78 Service Manual page 39

SCHEMATIC DIAGRAM-13
K
MAIN CIRCUIT
N
1 3
X401
(8MHz)
2
C401
0.022
R401
100K
L401
10 H
A B C D E F G H I
CN603A
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
F
To FL CIRCUIT(CN601)
on SCHEMATIC DIAGRAM-9
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:POSITIVE VOLTAGE LINE
M L K J I H
16 15 14 13 12
0V
DOK2
17
DSP2
R420 1K 0V
18 CNVss
4.9V
RESET
19
5V
20 DRST2
P40 NC
21
2.3V
22 X IN
R407 680 2.4V
X OUT
23
IC401
24 Vss
R403 M38037M8108F
MUT T
25
330
5V SYSTEM CONTROL
A 26 MUT F
MUT SW
27
28 MUT C
5V
B MUT S8
29
30 EXP23
EXP22
31
5V
C 32 EXP21
MJU ONKETU
33 34 35 36 37
R416 1K
E
R417 1K
F
R418 1K
G
5V
D203
RL1N4003N02
J K L M N O P Q R
-28.4V
30
39
:MIC SIGNAL LINE
:NEGATIVE VOLTAGE LINE
G F E D C B A
R406
10K
11 10 9 8 7 6 5 4 3 2 1
R440
10K
0V
ESW
64
DSP1
EXP11 63
EXP12
62
EXP13 61
RL2
60
AVss 59
5V
VREF
58
5V
5V
Vcc 57
5V
0V
CNTA1
56
0V
RL1 55
CNTA2
54
0V
OD SBMIX 53
0V
DDI
52
0V
INITITAL DDO 51
0V
DCK
50
P37 OE 49
ROMKORE
38 39 40 41 42 43 44 45 46 47 48
R431
R427
R425
5.1V
3.3V
7.7V
-7.7V
14.2V
14.8V
C459 0.1
A C405 0.1
B
C
D
E
F
:CD SIGNAL LINE
5V 0V
0V 4.9V
D
E
R424 10K
F
R422 1K
N
R421 10K
R426 1K
1K
D
1K
R
1K
K
C
5.1V
3.3V
7.7V
-7.7V
14.2V
14.8V
SA-AK78