Panasonic SA-AK88 Service Manual page 23

SCHEMATIC DIAGRAM-16
DPL CIRCUIT
C851
C829
C830
C831
C832
C833
C834
4.5V
C836 50V0.47 4.5V
C842 50V4.7 5.2V
C843 50V0.47 4.5V
C844 50V4.7 5.2V
C845 50V0.15 4.5V
C846 50V3.3 4.5V
C847 50V0.15 4.5V
C848 50V0.15 4.5V
C867 50V3.3 4.5V
C868 50V0.15 4.5V
C870 50V4.7 5.2V
C875 50V0.47 4.5V
C883 50V4.7 5.2V
C896 50V0.47 4.5V
4.5V
B
A
C823 R807
50V10 560
IC804
BA4558FE2
R848
4.7K
BUFFER AMP
B
0V
5
4
-7.9V
R847
4.7K
A
50V10
A B C D A B
CN801
1
2 3 4 5 6 7 8 9
TO
MAIN(CONTROL)
CIRCUIT(CP304)
ON SCHEMATIC
DIAGRAM-18
:POSITIVE VOLTAGE LINE
:NEGATIVE VOLTAGE LINE
16V220
16V220
16V10
16V10
16V10
16V10
0.1
1 2 3 4 5 6 7 8 9 10 11
RBPF3
80
DC CUT
79
L-R RECT
78
DC CUT
77
L+R RECT
76
VCS TH
75
74 VCS1
IC801
VCS2
73
LV1041M
VLR2
72
DOLBY PRO LOGIC
VLR1
71
CONTROL
VLR TH
70
L RECT
69
DC CUT
68
67 R RECT
DC-CUT
66
L BPF3
65
64 63 62 61 60 59 58 57 56 55 54
C898
0.1
C802
50V2.2
R806 R808
47K 220
C822
100P
A
0V 0V 7.7V
6 7 8
3 2 1
0V 0V 0V
C819
33P
B
C810 R804 R805
1K 56K
R803
220
CN802
1
2 3 4 5 6 7
TO
MAIN(CONTROL)
CIRCUIT(CP305)
ON SCHEMATIC
DIAGRAM-18
:CD-DA/V-CD(AUDIO) SIGNAL LINE
C861 50V2.2
D
12 13 14 15 16 17 18 19 20 21 22 23 24
C VOL OUT
C OP IN
A GND
C OP NF
C OP OUT
VOL REF
S OP OUT
S OP NF
S OP IN
S VOL OUT
OP VREF
S VOL IN
S OUT
DC CUT
53 52 51 50 49 48 47 46 45 44 43 42 41
1
A B
3
R890
560
5.1V
16 15 14
IC803
BU2090AF-E2
SYSTEM CONTROL
2 3
1
0V 0V
C838
8 50V1
A
C828
50V1
B
:CENTER SP. DRIVE SIGNAL LINE
:SURROUND SP. DRIVE SIGNAL LINE
C
L801
47 H
NC
25
9.1V C863
Vcc
26
50V0.1
2.6V
27
4.5V
28
29
4.5V
30
3.9V
31
2.6V C817 50V22
32
2.7V
33
4.5V
34
4.5V C864 0.047
35
2.6V
36
4.5V C816 16V10
37
2.6V
38
4.5V C862 50V2.2
39
4.5V C815 50V0.33
40
R868
1K
X801
R865
(8MHz)
1K
2
R866
2.2K
R867
2.2K
2.3V 2.3V
13 12 11 10 9
4
5 6 7 8
5V 5V
R871
2.2K
A
R858
2.2K
B
14.8V
Q801,802
2SD2114K1V
A B MUTING
R880 Q802
R860
1K
0V
120
0.7V
R859
R878
120
0.7V
1K
0V
Q801
IC802
BA178M09T
REGULATOR
OUT GND IN
3 2 1
9.1V 14.8V
C889
33P
R857
22K
C865
16V10
A
B
C866
R856
16V10
22K
C888
33P
Q804
KRA111STA
MUTING CONT. R864
1M
0.9V 0.8V
Q803
KRA111STA
MUTING CONT. R863
1M
0.9V 0.8V
A B
B
A