Kenwood VR-7080A User manual

AUDIO-VIDEO SURROUND RECEIVER
© 2003-8 PRINTED IN KOREA
B51-5875-00 (K/K) 1362
*Refer to parts list on page 6.
VR-7070A/7080A
SERVICE MANUAL
THX SPEAKER EQ ACTIVE EQ DSP STEREO INPUT MODE DIMMER
SOUND TONE
SETUP
BAND AUTO MEMORY
MULTI CONTROL LISTEN MODE
TUNER
MD/TAPE VIDEO 3VIDEO 2VIDEO 1
PHONOCD/DVD
THX
DTS
CS II
DOLBY DIGITAL
SPEAKER EQ
ACTIVE EQ
A SPEAKERS B
PHONES
DOWN
MUTE
AV AUX
S VIDEO VIDEO L-AUDIO-R
UP
VOLUME CONTROL
STANDBY
POWER
ON/STANDBY
DVD/6CH
Front glass *
(B10-)
Knob
(K29-8268-04)
Panel
(A60-2336-02)
Knob
(K29-8272-04)
Sub panel ass'y
(A22-1874-01)
Knob ass'y
(K29-8137-03)
Knob ass'y
(K29-8137-03)
Dressing panel
(A21-3983-12)
Note:
A different information will be available from this service manual. Pls refer to original service manual(B51-5843-00), too.
++--
SPEAKERS(8-16)
SPEAKERS(8-16)
PRE OUT
FRONT A
SURROUND
SURROUND BACK/
SUBWOOFER
FRONT B CENTER
FRONT B
-
+
PHONO CD/DVD MD/TAPE
REC OUT
VIDEO 1
PLAY IN PLAY IN
VIDEO 2 VIDEO 3
PLAY IN
DVD/6CH.INPUT
FRONT SURROUND
COAXIALSYSTEM CONTROL OPTICAL
CD/DVD
OPTICAL
VIDEO 3
OPTICAL
CD/DVD
DIGITAL IN DIGITAL OUT
IN
VIDEO
S VIDEO
IN
VIDEO
DVD/6CH
VIDEO 2
VIDEO
3
IN
DVD
IN
IN
DVD
ROOM B FRONT
CENTER
SURROUND
IR
RECEIVER
IN
IR
REPEATER
OUT
SURROUND
BACK
SUB
WOOFER
MONITOR
OUT
ROOM B
OUT
SUB WOOFER
IN IN REC OUT PLAY IN PLAY INPLAY INPLAY INREC OUT
CENTER
OUT IN
VIDEO
VIDEO
AC OUTLETS
150W 1.25A MAX.
SWITCHED TOTAL
WHITE GREEN
RED
L
R
YCB Y
YCB Y
-
+
BLUE PURPLE
GREY
L
R
L
R
COMPONENT VIDEO
MONITOR OUT
FM
75
GND
AM
ANTENNA
GND
AC power cord
(E30-2941-05)
Pin jack
(E63-1080-05)
AC outlet
(E03-0148-05)
Pin jack
(E63-1317-05)x2
Lock terminal board
(E70-0160-05)
Pin jack
(E63-1313-05)
AC power cord bushing
(J42-0349-05)
Cylindrical receptacle
(E56-0040-05)x3
Pin jack
(E63-1248-05)
Pin jack
(E63-1246-08)
Pin jack
(E63-1316-05)
Miniature phone jack
(E11-0389-05)
Miniature phone jack
(E11-0291-05)
Pin jack
(E63-1247-05)
Screw terminal board
(E70-0150-05)x2
Pin jack
(E63-1293-05)x2
Pin jack
(E63-1317-05)x2
Miniature phone jack
(E11-0293-05)
Metallic cabinet
(A01-3894-01)
Tuner ass'y
(W02-2974-15)
Oscillating module
(W02-2732-05)
Optical receiving module
(W02-2731-05)
Pin jack
(E63-1315-05)
70%

MODEL PARTS # BATTERY COVER
VR-7070A K7 A70-1620-05 A09-1274-08
VR-7070A P7 A70-1620-05 A09-1274-08
VR-7080A K8 A70-1619-05 A09-1275-08
VR-7080A P8 A70-1619-05 A09-1275-08
9
ABBRI.
Resetting the Microcomputer
The microcomputer may malfunction (unit cannot be operated, or
shows an erroneous display) if the power cord is unplugged while
the power is ON, or due to some other external factor. If this
happens, execute the following procedure to reset the
microcomputer and return the unit to its normal operating
condition.
Unplug the power cord from the wall outlet, then plug it
back in while holding down the POWER ON/STANDBY
key.
•Please note that resetting the microcomputer will clear the contents
of the memory and returns the unit to the state it was in when it left
the factory.
Memory back up function
Please note that the following items will be deleted from the unit's
memory if the power cord is disconnected from the AC outlet for
approximately 1 day.
• Power mode.
• Input selector settings.
• Picture output.
• Speaker ON/OFF.
• Volume level.
• BASS, TREBLE, INPUT level.
• TONE ON/OFF.
• LOUDNESS ON/OFF.
• Dimmer level.
• MD/TAPE settings.
• Listen mode setting.
• Speaker settings.
• SW RE-MIX ON/OFF.
• Distance setting.
• Bass peak level.
• Input mode setting.
• M idnight mode setting.
• PRO LOGICII mode setting.
• CS II mode setting.
• Broadcast band.
• Frequency setting.
• Preset stations.
• Tuning mode.
• THX mode.
• DSP mode.
• ACTIVE EQ mode.
• SPEAKER EQ mode.
FM indoor antenna (1)
(T90-0905-05)
AM loop antenna (1)
(T90-0893-05)
RF remote antenna (1)
Refer to the table on this page below.
Batteries (R6/AA) (2)
VR-7070A/7080A
2
ACCESSORIES / CAUTIONS
Accessories
Cautions
REMOTE CONTROL vs MODEL
DIFFERENT POINT
Model Service Manual Surround Display Sub
VR-7070 B51-5843-00 X09-6760-10 X25-6490-14
VR-7070A -X09-6830-10 X25-6620-10
VR-7080 B51-5843-00 X09-6760-10 X25-6490-14
VR-7080A -X09-6830-10 X25-6620-10
Audio
Change point;
R97,98,147,148,197,198, VR1-
6,Q11-14,31-34,51-54, D23
X08-3130-12 X14-7630-10
Note:
A different information will be available from this service manual. Pls refer to original service manual(B51-5843-00), too.

3
UWYVX
2
1
3
5
7
4
6
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD
W52
W53
C215
W54
C216
C127 C128
C129
C101
W8
C102
C103
C104
C105
C106
C107
C108
C109
C110
C111
C112
C113
C114
4
1
1
89
16
C115
C116
C117
C118
C119
C120
C121
C124
C123
C122
C201
C202
7
1
I
G
O
C203
R218
C205
C206
C207
C208
C209
C210
C211
C212
C213
C214
L201
L202
R101
R102
R103
R104
R105
R106
R107
R108
R109
R110
R111
R112
R113
R201
R202
R203
R204
R205
R206
R207
R208
R209
R210
R211
R212
R213
R214
R215
R216
R217
W17
W10
R114
W18
W13
W11
W9
R120
C133
W1
W2
W5
W12
W15
W4
W6
W3
1
1
78
14
7
14
8
W14
C134
W16
W19
W68
W42
W20
C135
C136
C130
C131
C132
R121
R122
C137
C138
C139
R431
R337 R336 R334
R333
R328
R327 R325 R321 C312
C310
C317 C315
C302
1
2
W23W24
C307 C308
R338
C305
R335
C306 C303
W22 W21
C304 C301
R331
W25
R332
C438
C313
C311
W41
R349
R339
W30
R340
C309
C457
R461
R507
R457
R463
C451
SWch
W31
R356
R308
R317
R307
R318
R357
R350
R315
R305
R326
R316
R347 R348
C435
C439
R330
C433
R358 R310
R455
R329
R320 R319
R309
R355 R352
C434
C440
R360 R359
R351
C436
R306
R313
R303
R323
R353
R345
R362
R324
R314 R311
R301
R346
R354
R341
R343
R423
C429
R417
Cch
R445
R505
C445
R405
W47
SBch
R418
R424
C430
R406
C412
C446
R506
C452
R453
R459
C453
W38
R462
1
45
8
1
45
8
1
45
8
1
45
8
W51
C449 C458
R456
SBch
W37
R458
R454
C454
W67
R460
R464
W39
R411 C450
C411
W35
R439
W49 R440
C406 C405
R412
C426
R502
R414
R420
C316
4
1
19
1
18
2
R442
C402
W36
W44
R421
R302
W26
R322
R312
R342
R344
SLch
R432
R433
C431
R430
SRch
C437
R428
W66
W40
C409
R503
C427
R415
R446
R403
C410
R404
R422
C428
R416
C403
C444
R444
R504
R410
FLch
FRch
R427
R426
R425
R413
R419
W28
W32
C432
C407
C425
R501
W34
R401
R441
C441
R407
C442
C401
C408
R402 R408
R409
R443
R437
C443
W63
W64
W61
W43
W46
R438
C404
C459 R448
C419
R449
W58
W60
C448
R435
W55
W57
W56
C447
R447
R450
W59
C420
R436
R451
W62
W65
W33
W29
W27
R452
W50
W45
W48 R434
B
BE
EB
E
BE
EB
EB
EB
EB
EB
EB
EB
EB
EB
EB
41
EB
EB
EB
EB
EB
EB
BE
BE
BE
BE
BE
BE
BE
BE
BE
BE
BE
EB
BE
BE
BE
D206
CN202
D205
D201
D202
D203
D204
J102
P201
Q201
Q202
Q203
Q204
J101
CN101
CN201
CN304
J303
J302
J301
CN302
Q302
Q307 Q317 Q309
WH2
Q316
Q308 Q318
Q315
Q305
Q319
Q310
Q320
Q313
Q303
Q306
Q304
Q301
Q314
Q311
Q411
Q407
Q412
Q408
CN303
Q403
Q312
WH1
Q402
D401
Q401
Q404
Q406
Q405
Q409
WH1
D402
CN301
WH2
J202
J201
IC101
IC102
IC201
IC202
IC403
IC404
IC402
IC401
(J70-1704-02)
X25-6620-10 A/2
X25 B/2
IR REPEATERIR IN
CrCbY
MONITOR OUTDVD IN
YCbCr
VIDEO3 IN
COMPONENT VIDEO
SUB WOOFER
SUB WOOFER
CENTER
LR
SURROUND BACK/
BACK
SURROUND
SURROUND
SURROUND FRONT ROOM B
SPEAKERS
PRE OUT

4
AO AP ARAQ 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
IN1GNDIN1
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
VCCIN2
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
3IN2
4SW2 IN3
2SW1 OUT
+11.5V
47u25
C913
470u16
+
CX
Y3
47P
75
R901
C901
75
R902
47P
C902
18
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
1GND
GND
4
+2.5V
Q5
36
+5V
6
7
+3.3V
100P CTLB2
+12V
R911 4.7K
Y7
R917
10K
R912 200 CTLA
4
+12V
6
5
V.MUTE
3
+2.5V
C908
100PC907
2.2
R921
+5V
+3.3V
VID. D GND
1
R683
470
R684
470
8
10
9
R811
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
FILT1 CMP REQ
31
CLK IN
22
30
29
FILT2 CLK SEL
32
33
CMP CLK
CMP DAT
22 28
22 27
AU DATA2 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
R797R795 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
DATA0
19
18
17
D GND 2
DATA3
DATA2
DATA1
14 15 13
CP601
10K
R807
1
R614
220
DATA7
DATA6
DATA5
DATA4
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
R635R644
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
CDTO
SDTO
11 SDTI 1
10
9BICK
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
SLAVE
XTO
D VDD
4D VSS
3
2XTI
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
J601A601
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.
AK-2 AK-2

5
AT AV AXAU AW
VR-7070A/7080A
X25-6620-10 (2/2)
5.1V
0V
C720
33P
1
R756 180
VDD
1/4W
R814
CTLB2 1/4W
+12V
1 4.7K
2 200 CTLA
4
+12V
6
5
V.MUTE
3
+
C662
100u10 1
+5V
100u10
+
C659
1/4W
R813
1+5V
+2.5V
+3.3V
VID. D GND
1
+5V
470 10
R811
1
13
12
11
14
+9.9V
+3.3V 5
C661
0.01 4
+
C654
10u50
C CTL
OUT VCC
GND 1
2
3
R670
4.7
C660
82P
+9.9V
R665
22K
+2.5V
C656 R812
1/4W
47u25
+
1
+2.5V
13
9
11
2
V OUT
3V IN
EXT
1VSS CE
R664
560
1/4W
4
5
+2.5V
+9.9V
R671
1 1/4W
OUT IN
GND
C666
0.1
C665
33P
4.7K
R676
1K
R673
R674
47K
R672
C667
220
R675
220
4700u16
+
+9.9V
10
+9.9V
18 2W
R666
R677
1.5K
+9.9V
+12V
R758 180
1/4W
12
13
R685
1+
R757 180
1
19
10
44
20
180
CP604
14
8
9
11
CP603
180 1
12V12V
R709
4.7K
29
R OUT2
2.7K
2200P
R718
100K
R714
C716
4 5 3 2
C623
0.01
1
3
11 12
6
5
4
VSS
7
10 9 8
26
10u50
C722
27 +
1
+
10K
C726
R724
100K
R728
8200P
18K
R726
8200P
C724
15K
R722
R730
5.6K
6
5
100K
R723
C725
47P
R727
1800P
10K
C719
2
C721
10u50
C712
10u50
R667
220
12
10
8
29 +
R725
2.2K
2200P
C723
R721
2.2K
4.7K
R729
3
R716
C714
820P
2.2K
R712
3.3K
5.6K
R720
6
5
+5V
C621
2.2u50
C619
0.1
22u50
C673
+
R663
220
19
20
CDTO IN T 1
16
15
+
22
A VSS DZF2 CSM C CLK CDTI
19 18
17
21
20
A VDD
VREF H 23
26
V COM
DZF1
L OUT3
24
25
R OUT3
L OUT2 27
28
2200P
R710
4.7K
10u50
C711
+
14
44
28
R713
100K
C715
2200P
R717
2.7K
2
C713
820P
2.2K
R715
3.3K
R711
R719
5.6K
3
C702
10u50
10u50
31 +
26
28
27
30 +
R706
2.2K
C704
R702
2.2K
R704
100K
C706
5
1800P
R708
10K
6
2.2K
C705
R703
100K
2.2K
1800P
R707
10K
C700
47P
2
3
C718
100P
C737
22P
R739
10K
1K
1
+12V
12V
100P
C728
12V
4
7100
R746
+12V
C727
100P
8
C741
1000P
R747
100
8
12
+12V
3
R745
12V
R744
220
4
7
R749
2.7K
R737
10K
R740
12V
C742
100P
4
76
5
C738
22P
1
R748
100
10K
R750
R738
10K
2.7K
14
GND
ST
N.C.
VSS
+12V
C717
8
100P
1220
R743
+12V
12V
11
100P
15
14
C744 13
12
10
9
8
7
6
C709
4700P
12V
R742
220
7
4
C708
100P
C710
100P
+12V
C707
100P
8
1
R741
220
1
4.7K
5
4
R751 3
2
12V
R752
5.6K
20
SW
N.C.
CK
DATA 16
17
18
19
21
22
23
24
25
17
16
30
RS IN2
RS
FR
LS
LS IN2
FL
26
27
VDD
28
29
+12V
4.7K
R753
R754
5.6K
SLAVE 38
39
RX3
P VDD
P VSS
31
L OUT1
R OUT1
29
30
L IN
R IN 32
33
0.1
34 35 36 37
RX4
R
R639
18K
C631
1/4W
R640
4.7
C701
+5V
30
31
C791
C703
2200P
R705R701
470P
R791
18K
C792
R792
470P
C740
10K
10K
R735
R736
C739
10u50
+
10u50
+
32
33
18K
+12V
VR-705-SA
+B
B
+12V
VR-716A
MODEL NAME
+5V
+5V
+B
+5V
+5V
SW
Q606
D607
D606
WH120
900
3/5
D614
D613
+3.3V AVR
CN901
X09-A/9-
+2.5V AVR
SW
Q608
AVR
+5V
D610
Q609
D609
D608
D604
SPACE
CHANNEL
(M)TYPE ON
IC701
IC703 (1/2)
IC703
IC702
IC702 (1/2)
(2/2)
SHIFTER
LEVEL
(2/2)
ADC&DAC)
ODEC
(2/2)
(1/2)
IC707
CENTER
SR
IC707
MIX
SW (2/2)
SL
FR
CONFIGURATION
IC901,902
FILTER
IC701-703,707
IC701 (1/2)
D602 IC705
D603
IC604
IC609
IC612
IC611
IC606
IC605
IC603
IC602
IC601
Q609
Q608
Q606
Q601,901,902
UDZ5.6B or:D606,607
D900-902
D610
D609
FL
MM1228XF
NJU7311AM
NJM4565MD
:
:
:
1SR154-400
HZU5.1(B2)
UDZ5.1B or
HZU5.6(B2)
D2SBA20F03
:
:
:
D604
D603
D602,605
D601,608,613,614
TC7WH123FU:
BA033LBSG
XC62EP2502MR
TC74HC07AF
TC74HCT7007AF
:
BA05T:
:
:
:
CS493263-CLR
TC7WU04FU
AK4586
CS493263-CLG or
:
:
:
MA142WK
HZU3.9(B2)
MA142WA
DAP202U or
UDZ3.9B or
1SS300 or
:
:
1SS301 or
DAN202U or
MA111
:
:
DIGITAL LINE
SIGNAL LINE
GND LINE
B LINE
B LINE
2SC4081(R,S) or:
2SB1218A(Q,R)
2SD1819A(Q,R)
2SA1576A(R,S) or:
DTC124EUA or
2SB1375
UN5212
:
:
(X08-3230-10)
IC611
IC609
IC612
IC605
IC705
IC602
The DC voltage is an actual reading measured with a high
impedance type voltmeter with no signal input. The mea-
surement value may vary depending on the measuring
instruments used or on the product.
BD-1