Schematic Diagram - Kenwood VR 3080 - Dolby Digital Receiver Service Manual

U V
(X08-297X-XX) (A/10)
+17V
17V
VDD
R743
10K
96
R755
47K
73
74
75
R744 3.3K
79
R745 3.3K
80
R746 3.3K 0V
81
81 AMUTE S
R776 3.3K
82a
R747 3.3K
0V 82
82 AMUTE MAIN
R748 1K
4.7V 83
83 RELAY SPA
R749 1K
0V 84
84 RELAY SPB
R750 470
0V 85
85 RELAY SPC&S
R751 1K
4.8V 86
86 RELAY POWER
R752 1K
4.7V 87
87 RELAY SECOND
R796 1K
0V 88
88 PROTECTION I
R797 1K
0V 89
89 PROTECTION V
0V 90
Ir RECEIVER ON/OFF
D705
0V 91
91 SEL CK
D706
0V 92
92 SEL DA
D707
0V 93
93 SEL ST1
R788 3.3K 0V 94
94 ATT3
R789 3.3K 4.9V 95
95 ATT6
R777 470 0V 96
TAPE2 LED
R757 100 5.1V 97
97 IR RWR
R758 100 0V 98
98 IR REN
R759 100 0V 99
99 IR REQ
100
VSS
REMOTE
IC72 u-COM
28
1
28
1
27
2
27
2
26
3
26
99 REQ
25
4
25
97 RER
24
5
24
98 REN
23
6
23
6
R767 100
22 0V
7
D7 8
7
R766 100
R756 21 0V
0V 8
D6 7
REMO
R765 100
100 20 0V
5.1V 9
D5 6
VDD
R764 100
19 0V
2.5V 10
D4 5
XOUT
R774 C712 R763 100
2.3V 11 18 0V
XIN D3 4
1M 0.01
12 17 0V R762 100
GND D2 3
5.1V 13 16 0V R761 100
RST D1 2
14 15 0V R760 100
WDO D0 1
X72
C708
3.64MHz
D708
0.1
VDD VDD
W X
+17V
17V
VDD
VDD
R722 47K
R723 47K
R724 47K
R725 47K
R726 47K
R727 47K
R728 47K
4.9V
50
DSP AC3
49
DSP DTS
48
CODEC AC3
47
CODEC ERR/OVR
46
CODEC CS
45
REM1
44
REM0
43
RESET
42
XT1
IC71
SYSTEM u-COM
41
XT2
40
VSS
39
X1
38
X2
37
VDD
36
CE
35
VOL. CK
34
VOL. DA
33
VOL. ST
32
TONE ST
31
V MUTE
C714 100P R815 R714 33K
C713 100P 47K R713 33K
R708 47K R712 33K
R705 10K R711 33K
R706 47K R710 33K
R701 10K R820 33K
R702 47K R818 33K
R769 10K
R771 10K
R703 10K
R704 47K R773
12
100
VDD VDD
VDD VDD
Y Z
VDD
VDD VDD
D855
R853 330
R855 100K
77
R856 100K
76
D856
R854 330
R851 100K
R852 100K
D853
D854
69
VDD
68 77
R859 76
100K
R860 100K
D857
0V
50
0V
49
D858
0V
48
4.4V
47
R717
4.9V
46
0V 3.3K
5.0V
5.0V
X71
12.5MHz
2.3V C711 R716
2.6V 4700P 1M
4.9V
VDD
5.1V
D704
0V C704
35 100P
D703
0V
34
D702
0V
33
D701
0V
32
0V
R808
D801
4.7
+5.8V
1/4W
VDD
R805
10K
5.0V
RESET
+ R804 C802
1K 1u50
0V
+
+
Q801
5.1V
VDD
VDD VDD
AA AB
+17V
17V
VDD
+5.8V
77
76
C866
0.1
78
68
69
REPEATER
+5.8V
OUTPUT AMP
13.4V
+13.7V
44
13.4V
AMP Q857
R878
13.4V
100
470 1/4W
0V
0V
Q856
R880
0V
470 1/4W
22K
+13.7V
13.4V Q851
IR INPUT
AMP
D860
4.8V
0V
Q852
L81 100uH
VDD
0V
5.3V
R870
IR INPUT AMP
10K
R867
Q853
D861
0V
1K C858
Q853
330P
0V
5.3V
L82 100uH Q854
VDD
R802
10K
RESET IC
IC81 5.1V
OUT IN
GND
VDD
AC AD
+17V
17V
+13.7V
+5.8V
J81
SYSTEM
CONTROL
BUSY
DATA
GND
D851
D852 S1
C853 0.1
C854
J82
220P RX
TX
SL16
C855 TEXT
220P
J85
R881
IR
R882
REPEATER
OUT
C865
0.01
J84
IR RECEIVER
R862
IN
1K R865 DC12V 15mA
0V
470
1/4W
J83
IR OUT
5.3V LCD
Q855
REMOTE
0V
A
R872 C862
100 100P
TEST PIN
5 CLK
75 4 SCK
73 3 SO
74 2 SI
1 GND
1 RST
VDD 2 VDD
3 VPP