Panasonic SA-AK88, Service Manual

Page: 23 / 42

D C
C836 50V0.47
C842 50V4.7
C843 50V0.47
C844 50V4.7
C845 50V0.15
C846 50V3.3
C875 50V0.47
C883 50V4.7
C896 50V0.47
C847 50V0.15
C848 50V0.15
C867 50V3.3
C868 50V0.15
C870 50V4.7
C835
0.1
C834 0.1
C863
50V0.1
IC804
BA4558FE2
BUFFER AMP
C817 50V22
C862 50V2.2
C815 50V0.33
C816 16V10
C864 0.047
R856
22K
C888
33P
C866
16V10
C865
16V10
R857
22K
C889
33P
A
B
9 3 2 4 5 6 7 8
1
Lch IN
Rch IN
GND
Lch OUT
Rch OUT
C OUT S OUT
GND
NC
TO
MAIN(CONTROL)
CIRCUIT(CP304)
ON SCHEMATIC
DIAGRAM-18
3 2 4 5 6 7
1
8
CN801 CN802
+B(3) -
B(1)
+B(4) GND
DA
T
A
CLK1 CLK4
NC
TO
MAIN(CONTROL)
CIRCUIT(CP305)
ON SCHEMATIC
DIAGRAM-18
IC801
LV1041M
DOLBY PRO LOGIC
CONTROL
C808
16V47
4 3 2 1
8 7 6 5
IC803
BU2090AF-E2
SYSTEM CONTROL
Q803
KRA111STA
MUTING CONT. R865
1K
C873
6.3V100
R867
2.2K
R868
1K
C874
6.3V100
R866
2.2K
B
A
9 10 11 12 13 14 15
Q4 ENABLE2 Q3 ENABLE1
Q2
Q1
Q0 CLK DA
T
A
Vss
C MUT
Q5
S MUT
Q6
VR
A
T
Q7
Q8
Q9
Q10
V
DD
Q1
1
8 7 6 5 4 3 2 1
16
R843
1K
R844
1K
IC802
BA178M09T
REGULATOR
C899
0.01
3 2 1
OUT GND IN
A
B
A
B
A
B
A B
B
A
A B
C840
16V10
C841
16V10
B
A
A B C D A B
R803
220
A B
SCHEMATIC DIAGRAM-16
DPL CIRCUIT
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
L
MIX OUT
L
NF
R NF
NR DET
C VOL
IN
DELA
Y
OUT
S IN R IN
L
IN
VREF-BUFFER
L
OUT
R OUT S OUT C OUT
Vcc
VREF
L
ch DC CUT
R ch DC CUT C ch DC CUT S ch DC CUT
RBPF1 RBPF2
RBPF3
DC CUT
L-R RECT
DC CUT
L+R RECT
VCS TH
VCS1
VCS2
VLR2
VLR1
VLR TH
L RECT
DC CUT
R RECT
DC-CUT
L BPF3
L
BPF1
R IN L
IN
C
TRIM DC CUT
CMODE CAP A
GND
NS BPF1 NS BPF2 OSC1 CLK DA
T
A
ENABL DA
T
A
CLK ENABL2 DIGIT
AL
GND
OSC OSC V
DD
A/ D NS D/
A
DC CUT
DC CUT
S OUT
S VOL IN
OP VREF
S VOL OUT
S OP IN
S OP NF
S OP OUT
VOL REF
C OP OUT
C OP NF
A GND
C OP IN
C VOL OUT
Vcc
NC
NR 1REF
R-MIX OUT
L
BPF2
R847
4.7K
R855
6.8K
R874
100K
R848
4.7K
C822
100P
R806
47K
R807
560
C823
50V10
C819
33P
R805
56K
R804
1K
C810
50V10
C838
50V1 R880
1K
R879
1K
Q801,802
2SD2114K1V
MUTING
Q802
R877
1K
R878
1K
C828
50V1
R860
120
Q801
Q804
KRA111STA
MUTING CONT. R864
1M
R863
1M
R859
120
R872
220
R876
220
R871
2.2K
R858
2.2K
R890
560
D804
UDZS5R1BT
A
C869
16V33
C887
0.1
C821
16V47
R808
220
C900
16V33
C882
16V220
L801
47 H
C818
16V220
C801 50V2.2
R801
39K
C802
50V2.2
R802
39K
C803 16V47 C804 50V0.47
C805 0.022 C806 0.047
C807 680P
R826
2.2K
R827 2.2K
R823
1M
R822 1K C809 16V220
C81
1 0.082
C812 3300P
C813 0.082 C814 50V0.47
X801
(8MHz)
C898
0.1
C897
0.1
C833 16V10
C832 16V10
C831 16V10
C830 16V10
C829 16V220
C851 16V220
C861 50V2.2
R836 2.2K
R835 18K
C824 16V220
C820 50V2.2
R892 39K
C837
0.1
2
1
3
:NEGATIVE VOLTAGE LINE
:POSITIVE VOLTAGE LINE
:CENTER SP. DRIVE SIGNAL LINE
:SURROUND SP. DRIVE SIGNAL LINE
:CD-DA/V-CD(AUDIO) SIGNAL LINE
14.8V
0.7V
0V
0.7V
0V
5V 5V 0V 0V
2.3V 2.3V 5.1V
7.7V 0V 0V 0V
0V 0V 0V -7.9V
0.8V
0.8V 0.9V
0.9V
14.8V 9.1V
9.1V
2.6V
4.5V
4.5V
3.9V
2.6V
2.7V
4.5V
2.6V
4.5V
4.5V
2.6V
4.5V
4.5V
4.5V 4.5V 0.7V 2V 2.6V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 9.1V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V
4.5V
4.5V
5.2V
4.5V
5.2V
4.5V
4.5V
4.5V
4.5V
4.5V
4.5V
5.2V
4.5V
5.2V
4.5V
4.5V
4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 0.1V
0V 0V 0V 0V 0V
5.1V 2.5V 2.6V 5.2V 4.5V 4.5V 4.5V 4.5V