Panasonic SA-AK78 Service Manual page 41

SCHEMATIC DIAGRAM-15
K
MAIN CIRCUIT
5V
B A D
C860
2200P
C862 C864
470P
C863
R860
56
C861
R853 270K
R854
K
J
L804
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:NEGATIVE VOLTAGE LINE
:POSITIVE VOLTAGE LINE
L M K
R890
10K
R828
4.7K
R883
4.7K
80 79 78 77 76 75 74
NC
81
82 TST0
TST1
83
84 TST2
TST3
85
5V
86 VDM
6.3V47 2.5V
VRM1
87
2.5V
88 M IN
2.5V
M OUT
89
6.3V47 4.2V
90 VRM2
GNDM
91
560P
92 VSAL
2.4V
L IN
93
2.5V
94 AVRL
5V
VDL
95
47K 5V
96 VDR
2.5V
AVRR
97
2.4V
98 R IN
VSAR
99
100 GNDX
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 30
R259 C867 R867
10K 50V1 560
C891
0.01
R260 C868 R868
10K 50V1 560
L811
5V
:SUB WOOFER/FRONT LOW SP DRIVE SIGNAL LINE
:CD SIGNAL LINE :SURROUND/HIGHT SP DRIVE SIGNAL LINE
J I H N
R861
100K
B A C D
C895
0.022
73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57
IC802
TC9496F-013A
DIGITAL SOUND
CONTROLLER
C884 C877 C879
2200P 0.01 2200P
C878
0.01
C888
6.3V47
R862
390
41
L806
56 55 54 53 52 51
CKO1
50
CKO0 49
FS
48
TP12 47
TP11
46
TP10 45
TP9
44
TP8 43
TP7
42
TP6 41
TP5
40
GND R 39
5V
V R
DD 38
5V
V 37
DD
TP4
36
TP3 35
TP2
34
TP1 33
TP0
32
NC 31
Q801
IMX9T110
ATTENUATOR
0.6V
1 5 6
0V
3 2 4 0V
0.6V
R878 R877
15K 15K
C880 R870 C876 C826 R848
2200P 1K 16V10 50V1 2.7K
R869 C875 C825 R847
1K 16V10 50V1 2.7K
Q802
2SD2114K1V
ATTENUATOR R865
2.2K
0.6V
0V
5V
5.1V
3.3V
7.7V
-7.7V
14.2V
14.8V
SA-AK78