Panasonic SA-AK78 Service Manual page 33

SCHEMATIC DIAGRAM-7
E
OPERATION(1) CIRCUIT
R930 R929 R928 R927
22K 10K 6.8K 4.7K
D615-619
SLR325MCT31W
F
FL CIRCUIT
R620 R619 R618 R617
6.8K 4.7K 2.7K 2.2K
5.3V 5.3V 5.3V 5.3V 5.3V
9 10 11 12 13
IC604
BU2090AF-E2
LED DRIVE
4
8 7 6 5
5.4V 5.3V 5.3V 5.3V
0.4V
0.4V
0.4V
G
OPERATION(2) CIRCUIT
R968 R967
10K 6.8K
VR602
(JOG PLUSE
ENCODER)
D622,623,630,632
LNJ301MPUJAD
1 2 3
B A F E
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R926 R925 R924 R923 R922
2.7K 2.2K 1.8K 1.2K 1K
R616 R615 R614 R613
1.8K 1.2K 1K 1K
D625-629,631
SLR325DCT31
D637
SLR325MCT31W
R958
100
5.3V 5.3V 5V
14 15 16
3 2
1
0V 0V
R945
1K
R946
1K
CN602A
CN602B
6.8V
R966 R965 R964 R963 R962
4.7K 2.7K 2.2K 1.8K 1.2K
R975 R974 R973A
2.2K 1.8K 1.2K
D C
33
:MIC SIGNAL LINE
:POSITIVE VOLTAGE LINE
R921
1K
H603B H603A
1 1
2 2
3 3
E
4 4
D
5 5
C
6 6
B
7 7
8 8 A
5V
6.8V
A B C D E
0.4V 5.4V 5.4V 5.4V 5.4V 4.2V
9 10 11 12 13 14
8 7 6 5 4 3
0.4V 5.4V 5.4V 5.4V 5.4V 0V
5.4V 0.4V 5.4V
5.4V 0.4V 5.4V
5.4V 5.4V 0.4V
S616
(KARAOKE EFECT)
R626
1.8K
10 9 8 7 6 5 4 3 2 1
10
9 8 7 6 5 4 3 2 1
R627
2.2K
A B C D E F
R961 R960
1K 1K
JK601
MIC1
R972A R971
1K 1K
JK602
MIC2
A
B
Q608
2SB621ARSTA
POWER SUPPLY
6.8V
6.1V
6.8V
R637
22K
0.2V 5V
15 16
IC603
BU2090AF-E2
LED DRIVE
2 1
0V
R610
1K
D602-606
LNJ301MPUJAD
R611
1K
C
D
E
F
G
H
I
J
R625 R624 R623
1.2K 1K 1K
R628 R632 R633 R693
2.7K 4.7K 6.8K 10K
L608
•
10 H
4
R982
5
680
2
3
6
7
1
4
5
2
3
L609
6
•
10 H
7
1
SA-AK78