Kenwood VR-7070A, Service Manual

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4
AO AP AR AQ AS
2
1
3
5
7
4
6
VR-7070A/7080A
X25-6620-10 (1/2)
+3.3V
VDD
100P
R907
75
C917
VCC
Y
C
Y
C
Y
C
8
C915
IN1 GND IN1
Y5
Y7
C7
C5
47P
100K R905 C905 100K R906
47P
C906
47P
75
R903 C903
75
R904
47P
C904
0.01
4
C910
3
2
VCC IN2
SW2
5
IN3
SW1
6
OUT
7
10 1/4W
R916 C5 Y3
C7
100P
C918
+11.5V
0.01
C909
R908
0.01
C916
75
47u25
+
C912
10 1/4W
R915
+
+11.5V
Y5
7
5
6
VCC
3
IN2
4
SW2 IN3
2
SW1
OUT
+11.5V
47u25
C913
470u16
+
CX
Y3
47P
75
R901 C901
75
R902
47P
C902
1 8
X601
R604
1M
R603
1M
4 2
1
3
R602
220
GND
6 7 5
C602
1000P
12.288MHz
CLR B A
C604
27P
1
3
2
C603
22P
RX/CX
VCC
8 6 7
14
0.01
C920
C919
0.01
8
1
GND
GND
4
+2.5V
Q
5
36
+5V
6
7
+3.3V
100P
CTLB 2
+12V
R911 4.7K
Y7
R917
10K
R912 200
CTLA 4
+12V
6
5
V.MUTE 3
+2.5V
C908
100P C907
2.2
R921
+5V
+3.3V
VID. D GND 1
R683
470
R684
470
8
10
9
R81
1
1
13 12
11
14
+5V
+5V
C672
+
C669 C676
SCDI0
R804
R803
R802
R801
R800
R799
R806
1 1/4W
R623 10K
+2.5V
0.01
R626
3.3K
C612
22
4.7K 4.7K
20
R633 R632
C607 22P
C675 22P
R610
220
C608
1000P
R601
220
+3.3V
R810
R605
10K
C601
0.01
C606
0.01
R609
100K
C605
0.01
1
R809
1
47u25
C616
+2.5V
R629 10K
C614
0.01
C615 470P
+
C613 2.2u50
R630
33K
+
R634
470
R631
1/4W
1
R805
0.01 0.01
100
+2.5V
R680
R608
220
13
+3.3V
2
18
470
+2.5V
36
22
39
+5V
13
AU DATA1
AU DATA0
LR CLK
S CLK
M CLK
VD1
D GND1
AU DATA3
WR
LR CLK N1
FIL
T1
CMP
REQ
31
CLK IN
22
30 29
FIL
T2
CLK SEL
32 33
CMP CLK
CMP DAT
22
28
22
27
AU DA
T
A
2
RESET A
GND
VA
C617
34
C618
36 35
DC DD
38 37 39
23
S CLK N1
D GND3
22
22 26
25
24
VD3
S DATA N1
EXTMEM
22
21
20
ABOOT
R797 R795 22
42
R638 22
R637 22
R692 22
40
41
40
42
41
14
+5V
+3.3V
39
19
40
22
R798
22
C609
0.01
R793 22
R794 22
44
43
+2.5V
1
44
43
2
3.3K
R611
3
4
R796 22
R642 22
R678 22
22
+5V
41
43
R679 22
R689 22
44
42
22P
0.1
18
R624
220
R627
220
3.3K
R625
R628
220
C611
1000P
20
+2.5V
19
RD
A1
C610
12
0.01
16
CS
D
ATA
0
19
18
17
D GND 2
DA
T
A
3
D
ATA
2
DA
T
A
1
14 15 13
CP601
10K
R807
1
R614
220
D
ATA
7
DA
T
A
6
DA
T
A
5
D
ATA
4
VD2
11 8 9 10
A0
7
1/4W
CP602
10K
7
100u10
R690
470
1/4W R691
4.7
+
C657
3 2
1
+5V
+5V
6
5
3.3K
R612
R613
220
6
R808
+2.5V
1/4W
1
+5V
10u50
C670
2
1/4W
4.7
C668
0.1
R641
C636
4700P
C637
4700P
R635 R644
75 75
C635
22P
C634
22P
R693
100
R OUT
VSS
6 7 4 5 3 2 1
VDD
C622
0.01
1
3 2
13 14 11 12
6 5 4
VSS
7
10 9 8
+5V
C619
0.1
R663
220
19
20
CDT
O
SDTO
11
SDTI 1
10
9
BICK
IN T
1
IN T
0
SDTI 3 SDTI 2
14
13
12
16
15
TX
8
7
LRCK
MCKO
6
5
22P
T VDD
22
A
VSS
DZF2 CSM C CLK CDTI
19 18
17
21
20
A
VDD
VREF
V CO
DZ
L OUT
R OUT
L OUT
SLA
VE
XTO
D VDD
4
D VSS
3
2
XTI
PDN
44
1
C671
47P
38 39 40 41 42 43
RX2
12C
RX1
RX3 TST
P
VDD
P
VSS
L OUT
R OU
L
R
0.1
34 35 36 37
RX4
R
R639
18K
C631
100
R694
+5V
+5V
+5V
OSCILLATOR
OUT
MONITOR
PLAY IN
DVD
ONLY
PLAY IN
VIDEO2
VR-716A
J901
C
Q601
S VIDEO
Y
DETECT
DIGITAL
W
Q901
D902 D901 D900
Q902
3/
CN901
X0
D601
AUDIO
DECODER
DIGITAL
CD/DVD
J601 A601
D605
VIDEO2 DVD
OPTICAL INPUT
COAXIAL
INPUT
LEVEL
SHIFTER
(ADC&DAC)
CODEC
IC603
IC901
IC902
IC604
IC601
(X08-3230-10) USED VR-705-SA, VR-716A
IC606
IC602
CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts
list). indicates safety critical components. For continued protection against risk of fire, replace only with same type and rating
fuse(s). To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out (exposed parts are
acceptably insulated from the supply circuit) before the appliance is returned to the customer.
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