Kenwood VR 3080 - Dolby Digital Receiver, KRF-V7772D, VR-3080 Service Manual

AUDIO VIDEO SURROUND RECEIVER

KRF-V7772D
VR-3080

SERVICE MANUAL

© 1999-3/B51-5511-00 (K/K) 1841

POWER

ON/STANDBY

CLIP INDICATOR DOLBY DIGITAL DTS

SPEAKERS

A

B

MUTE

VOLUME

DOWN UP

INPUT SELECTOR

DISPLAY MODE

PHONES

S VIDEO

V AV AUX L-AUDIO-R

CD2/TAPE2

MONITOR

PRE OUT

FRONT

SURROUND

CENTER

SUBWOOFER

AM

GND

FM
75Ω

ANTENNA

AUDIO

PHONO

CD1

MD/TAPE1

REC
OUT

PLAY

IN

VIDEO1

REC
OUT

PLAY

IN

VIDEO2

PLAY

IN

VIDEO3

PLAY

IN

VIDEO4

PLAY

IN

CD2/TAPE2

MONITOR

REC
OUT

PLAY

IN

FRONT SPEAKERS

(6-16Ω)

SURROUND SPEAKERS

(6-16Ω)

CENTER

SPEAKER

(6-16Ω)

SWITCHED

TOTAL 100W MAX.

S VIDEO

VIDEO

MONITOR

OUT

VIDEO1
REC
OUT

PLAY

IN

VIDEO2

PLAY

IN

VIDEO3

PLAY

IN

VIDEO4

PLAY

IN

DIGITAL IN

SL16
TEXT

SYSTEM

CONTROL

VIDEO2

OPTICAL OPTICAL COAXIALCOAXIAL

VIDEO3 VIDEO4 CD1

IR RECEIVER

IN

DC12V 15mA

IR REPEATER

OUT

IR OUT

LCD

REMOTE

SL16 XS8

Panel *
(A60-)

Panel escutcheon
(B01-0533-21)

Knob
(K29-6855-03)

Indicator
(B12-0333-04)

Knob
(K29-6855-03)

Front glass
(B10-2418-03)

Front glass
(B10-2451-03)

Cylindrical receptacle
(E56-0012-05)

Foot
(J02-1405-03)

Phone jack
(E11-0271-05)

Knob
(K29-6858-12)

Indicator
(B12-0331-04)

Knob
(K29-6858-12)

Knob
(K29-6852-04)

AC power cord*
(E30-)

Slide switch
(S31-2132-05)

Phono jack
(E63-1028-05)

Cylindrical receptacle
(E56-0011-05)

Phono jack
(E63-0162-05)

Phono jack
(E63-0141-15)x2

Screw terminal board
(E70-0096-05)

*Refer to parts list on page37~.

Power cord bushing
(J42-0083-05)

Phono jack
(E63-1084-05)

Screw terminal board
(E70-0095-05)

Miniature phone jack
(E11-0360-05)

Miniature Phone jack
(E11-0291-05)

Optical receiving module
(W02-1181-05)

Lock terminal board
(E70-0052-05)

AC outlet *
(E03-)

Miniature Phone jack
(E11-0389-05)

Phono jack
(E63-0139-15)

Miniature Phone jack
(E11-0293-05)

Phono jack
(E63-1030-05)

Remote

ENTER

VOLUME

CONFIRM

MUTE

ON/STANDBY

Batteries AM Loop Antenna (T90-0833-05)

plug adapter

FM

(T90-0841-05)

Antenna

Use to adapt the plug onthe
power cord to the shape of the
wall outlet.

(Present only for regions where
use is necessary.)

AM Antenna

Base

CONTENTS / ACCESSORIES

WIRING DIAGRAM....................................................13

PC BOARD ................................................................14

SCHEMATIC DIAGRAM............................................19

EXPLODED VIEW .....................................................36

PARTS LIST...............................................................37

SPECIFICATIONS.....................................................49

OPEN

If none of the above solutions work, reset the micro­processor:

(For USA and Canada)

1. Turn the receiver off.

2. Unplug the receiver.

3. Plug it back in while pressing and holding the
Power button (you may need someone else to
help you do this)

4. Continue to hold the Power button for more than
1 second.

(For Other Countries)

1. Turn the receiver off. (The Power button is OFF
position.)

2. Press ON/STANDBY button while pressing and
holding the Power button.

3. Continue to hold the Power button for more than
1 second.

KRF-V7772D/VR-3080

3

CONTROLS

POWER

ON/STANDBY

CLIP INDICATOR DOLBY DIGITAL DTS

SPEAKERS

A

B

MUTE

VOLUME

DOWN UP

INPUT SELECTOR

DISPLAY MODE

PHONES

S VIDEO

V AV AUX L-AUDIO-R

CD2/TAPE2

MONITOR

POWER

ON/STANDBY

ON OFF

9. Volume control knob

10. Display Mode button

11. Input selector button

12. AV AUX S VIDEO jack

13. AV AUX composite video jack

14. AV AUX audio jacks

15. CD2/Tape 2 Monitor indicator light

ENTER

VOLUME

CONFIRM

MUTE

ON/STANDBY

6

6

3

4

4

9

9

3

3

2

11

12

1

4

3

5

x2

9

x5

8

x2

3

x2

7

13

13

13

14

14

15

10

DISASSEMBLY FOR REPAIR

1

4

5

6

x2

3

x4

2

X09-

x3

HOOK

HOOK

1

4

6

6

6

6

x2

3

2

x2

2

x7

X08-

X08-

1

1

4

4

4

6

6

5

B side

Fig. 2

Fig. 1

Fig. 3

VIDEO 1

AV AUX

(FRONT)

VIDEO 4

VIDEO 3

VIDEO 2

VIDEO 1

COMP
VIDEO

PLAY

COMP

REC

VIDEO

Q611,612

BA7626F

IC61

Q621,622

OUT

Q623

(OSD)

1Vp-p/75

(VISUAL)

VIDEO 1

VIDEO 2

VIDEO 3

VIDEO 4

(FRONT)
AV AUX

REC

PLAY

(S1-VIDEO)
1Vp-p/75

MONITOR OUT

Q643

Q653,

Q655

Q642

Q641

VIDEO 1

Q651,652

BA7626F

IC65,66

CD1

VIDEO1

VIDEO2

VIDEO3

VIDEO4

MD/TAPE1

TAPE2

VIDEO1

VIDEO3

VIDEO2

VIDEO4

AVR

IC8

+5.7V

GND

D17-20

FINAL TR.

FINAL TR.

GND

PRE DRIVE

GND

PRE DRIVE

D2

D1

Q100

RELAY
DRIVER

-17V

GND

+17V

D3-6

Q2

AVR

Q1

+5.0V

GND

Q16

AVR

D13-16

Q7

AVR

-35V

FIL
FIL

STROKE SW

Q8

RELAY
DRIVER

AC OUTLET

D9

K6

T1

AVR

IC5

CD1

L3,R3

L2,R2

L1,R1

L8,R8

L7,R7

L6,R6

L5,R5

L5,R5

MONITOR

L6,R6

MD/TAPE1

L4,R4

L3,R3

IC2

BUFFER

REC OUT

L1,R1 L8,R8

L7,R7

IN

L2,R2

LINE
BUFFER

IC3

TUNER

2.5mV/

PHONO

IC6

IC5

IC4

IC1

EQ

(ANALOG)

INPUT ATT

IC1

BUFFER

DAC

DIR

IC3

21kHz LPF

21kHz LPF

21kHz LPF

21kHz LPF

IC11

IC21

IC31(1/2)

IC31(2/2)

SUB

CENTER

LS,RS,

FL,FR

CONFIG-2

IC12,13

FILLTER

TONE OFF

L7,R7

L6,R6

L5,R5

L2,R2

TONE

IC41

IC42

L1,R1

L8,R8

L3,R3

VOLUME

VOLUME

VOLUME

VOLUME

IC16

IC26

IC36(1/2)

IC36(2/2)

Q352

Q251,252

-20dB

Q351

Q151,152

ATT

-20dB
ATT

-20dB
ATT

-20dB
ATT

IC37
(2/2)

(1/2)

IC27

IC17

AMP

Q15

Q13,14

Q11,12

MUTE

MUTE

MUTE

A-MUTE

MUTE

Q253-256

Q353,355

MUTE

Q354,356

MUTE

MUTE

K5

K4

K2

POWER
AMPLIFIER

POWER

POWER

K3

RELAY A

RELAY CS

RELAY B

A-MUTE

S-MUTE

SW-MUTE

FRONT

SW

L,R

FRONT B

C

LS,RS

PHONES

L,R

FRONT A

SPEAKERS

PRE OUT

1.0V/1K

u-COM

IC71

CONTROL

REMOTE

A91

PROTECTION
S1 DETECTOR

V MUTE

SP.RELAY

SW MUTE

S MUTE

A MUTE

200mV/47K
200mV/2.2K

IN
OUT

OTHER

IC15

AMPLIFIER

AMPLIFIER

DIGITAL

PHONES

1.3Vrms/32

S1

CD2/TAPE2

PLAY
IN

AV AUX IN

(FRONT)

REC
OUT

COAXIAL
IN

OPTICAL
IN

(2/2)

IC32

L,R

+5.7V

IC62

AVR

4.7K

PHONO

Q153-156

1.1Vrms/32

A2

A1

L4,R4

MONITOR

Q3,4Q1,2

654

IC37

C

LS,RS

A/C
CONVERTER
CS4226

DSP

SRAM

IC51

IC52

X51

IC56,57

-6dB
ATT

IC32
(1/2)

L4,R4

TUNER 8
AUDIO SEL. 3
DPS 10
DIR DAC,ADC 9
TONE.VOL. 3
20dB ATT

3

6 (J TYPE)

OUT

IR REPEATER

J85

IN

IR RECIEVER

J84

OUT

IR RECIEVER

J83

IR LED
REMOTE OUT

D571-574

SYSTEM

J81

SYSTEM
CONTROL

J82

TEXT

SL16

FL

ED1

LEDx7
FL
MI-COM

IC91

38kHz
FILTER

856,857

Q851,852,

455kHz
FILTER

Q853-855

CONTROL

IC72

REMOTE
MI-COM

X8

RX

BUSY

TX

DATA,

D30

D10

AVR

IC54

+3.3V

AVR

J

K,Y,M,X

20.0V/4

24.5V/6K,Y,M,X

J

5ch SP. OUTPUT

DETECTOR

S1

IC67

J1

J2

-20dB ATT

K1

V-MUTE

Y
C

C

Y

Y
C

C

Y

C

Y

V-MUTE

Y

C

C

Y

+

+

+

SE-RLY

+

+

+

POWER-RLY

to
u-COM

to
POWER

SELECTOR

to

SRAM

CODEC

VOLUME

-3dB ATT

-6dB ATT

-144

R141

ST
RST

CK

DI

DO

51

to
u-COM

FL

TONE
TUNER
PRE AMP

to DSP

to

to
VIDEO
SELECTOR

u-COM

EACH
INPUT
C-TERMMNAL

VR-3080

(X09) (X08)

(X09)

(X09)

KRF-V7772D

(X08)

(X05)

(X08)

(X08)

(J TYPE)

(X08)

(SIGNAL STAGE)

(u-COM STAGE)

KRF-V7772D/VR-3080

5

BLOCK DIAGRAM

CIRCUIT DESCRIPTION

(0 : Pull down, 1 : Pull up)

Reception
frequency

Channel

IF

PLL standard

Tuner sw

space

frequency

TSW3 TSW2 TSW1 TSW0

FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz

0000

AM 530kHz~1700kHz 10kHz +450kHz 10kHz
FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz

0011

AM 530kHz~1610kHz 10kHz +450kHz 10kHz
FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz

1010

AM 530kHz~1700kHz 10kHz +450kHz 10kHz
FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz

0001

AM 531kHz~1602kHz 9kHz +450kHz 9kHz
FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz
AM 531kHz~1602kHz 9kHz +450kHz 9kHz

0101

FM L 65.0MHz~74.0MHz 10kHz +10.7MHz 5kHz
FM H 87.5MHz~108.0MHz 50kHz +10.7MHz 5kHz

1011

AM 531kHz~1602kHz 9kHz +450kHz 9kHz

K2/E1 is switched with only the setting of DSW1 (X11 : S601).

00X1

(DSW1 = 0 : K2 type, 1 : E1 type)

10 11 12 13

: C : 10ft
: RS/LS : 5ft
: SW : 10ft

• FRONT SP. : LARGE

• CENTER SP. : NORMAL

• SURROUND SP. : NORMAL/WIRED

• SUB WOOFER : ON

• SW Re-Mix : OFF

• INPUT LEVEL : 0dB

• CH. LEVEL : 0dB

• TONE BASS : 0dB

• TONE TREBLE : 0dB

• TUNING MODE : AUTO

• PRESET MEMORY : TEST MEMORY FRE­QUENCY (Same value with KR-V999D/1090VR)

• LAST BAND : FM

• FM LAST FREQUENCY : 87.5MHz

• AM LAST FREQUENCY : 531kHz (CH. SP 9kHz)

: 530kHz (CH. SP 10kHz)

• LAST P. ch : [- -ch]

1-2 The initial setting

While pressing POWER key, plug the AC power cord into
an AC outlet (K,P type) or turn on the AC POWER
switch.

CLIP INDICATOR LED are lighted. The other LED are
flashed.
A backup at the thing except ON/OFF of POWER is
initialized.

[cancel method]

The power supply is turned off.

KRF-V7772D/VR-3080

7

CIRCUIT DESCRIPTION

(X08)IC16 (X08)IC15

(X08)IC26 (X09)IC5

(X08)IC36 (X09)IC4

(X08)IC42

(X08)S91-96 (X08)S97

(X08)IC71

(X08)IC3

(X08)IC91

(X08)IC51

(X09)ED1

(X09)K2-5

(X05)

(X08)J81

(X08)IC72 (X08) (X08)A91 (X08)J84

MAIN UCOM

µPD784214GF-527

TACT KEY

ROTARY­ENCODER

FLDRIVER
uPD780204

DESTYINAFLTI
ON SW

LCD REMOTE
TRANSMIT IC

VOLUME IC
TC9412

VOLUME IC
TC9412

VOLUME IC
TC9412

SELECTOR IC
TC9162

SELECTOR IC
NJU7312AL

SELECTOR IC
NJU7313AL

TONE CONTROL IC
TC9184

CODEC

CS4226

DSP
YSS912

SP.RELAY

MUTETUNER UNIT

IR RECEIVER
DESTINATION

IRREMOTE

IR RECEIVER

SYSTEM
CONTROL

uPD17215

TUNER STEREO

P. CALLUPP. CALL

DOWN

ATT

OFF ON FM

AUTO/STEREO MANUAL/MONO

(DOLBY DIGITAL LED : OFF ON)

(Press the key for 2 secs)

CD1 STEREO

TONE (TUNED)

+10 (light on) OFF (light off)

ANALOG DIGITAL

MD/TAPE1 STEREO

IR RECEIVER A(ON) OFF

VIDEO1 PRO LOGIC
VIDEO2 3 STEREO

VIDEO4 DSP

ARENA JAZZ CLUB

THEATER STADIUM

CATHEDRAL

AV AUX STEREO

TAPE2

OFF ON

PHONO STEREO

INPUT LEVEL

0dB -3dB -6dB

CIRCUIT DESCRIPTION

KRF-V7772D/VR-3080

9

CIRCUIT DESCRIPTION

66 DSP_SO O P.D. DSP(YSS912), CODEC(CS4226)DATA OUT
67 DSP_SCK O P.D. DSP(YSS912), CODEC(CS4226)CLOCK
68 TEXT_RX I P.D. CD TEXT UART COMMUNICATION DATA IN
69 TEXT_TX O P.D. CD TEXT UART COMMUNICATION DATA OUT
70 DSP_IC O P.D. DSP(YSS912) INITIAL CLEAR
71 FL_RST O P.D. FL DRIVER(uPD780204) RESET
72 FL_STB O P.D. FL DRIVER(uPD780204) STROBE
73 FL_DI I P.D. FL DRIVER(uPD780204) DATA IN
74 FL_DO O P.D. FL DRIVER(uPD780204) DATA OUT
75 FL_CLK O P.D. FL DRIVER(uPD780204) CLOCK
76 8/16 I/O - SERIAL XS8/SL16 CHANGEOVER(SL16:L)
77 S_DATA I/O P.D. SERIAL DATA
78 S_BUSY I P.D. SERIAL BUSY
79 SW_MUTE O P.D. SUBWOOFER MUTE
80 ATT-20dB O P.D. 20dB AMP CHANGEOVER (AMP on:H)
81 SUR_MUTE O P.D. SURROUND ch MUTE
82 MAIN_MUTE O P.D. MAIN MUTE

85 SP_CS O P.D. CENTER,SURROUND SPEAKER RELAY
86 POWER O P.D. POWER RELAY
87 SECOND O P.D. POWER RELAY 2
88 I_PROT I P.D. PROTECTION CURRENT DETECT
89 V_PROT I P.D. PROTECTION VOLTAGE DETECT
90 IR_RCV I - IR RECEIVER DISTINCTION(IR RECEIVER EXIST:H)
91 SEL_CLK O P.D. SELECTOR(NJU7312,NJU7313,TC9162) CLOCK
92 SEL_DATA O P.D. SELECTOR(NJU7312,NJU7313,TC9162) DATA
93 SEL_ST O P.D. SELECTOR(NJU7312,NJU7313,TC9162) STROBE
94 IN_ATT3 O P.D. INPUT ATTENUATOR -3dB
95 IN_ATT6 O P.D. INPUT ATTENUATOR -6dB
96 TAPE2_LED O P.D. TAPE2 LED
97 REM_RWR I P.D. LCD REMOTE RWR
98 REM_ENB I P.D. LCD REMOTE ENABLE
99 REM_REQ O P.D. LCD REMOTE REQUEST

PIN No.(L ch) 2 3 5689

PIN No.(R ch) 27 26 24 23 21 20

SW No. (L.R ch) L1,R1 L2,R2 L3,R3 L4,R4 L5,R5 L6,R6

TONE on 1 0

TONE o ff 0 1
SPEAKERS B on 1 0
SPEAKERS B o ff 0 1

ANALOG THROUGH 1 0

11

18

L7,R7

0
0
1

(1:H , 0:L)

NJU7313AL NJU7312AL *3
PIN No.(Lch) 2 3 4 5 7 8 10 11 2 3 4 6 7 8
PIN No.(Rch) 27 26 25 24 22 21 19 18 27 26 25 23 22 21

SW No. (Lch) L1 L2 L3 L4 L5 L6 L8 L9 L1 L2 L3 L4 L5 L6
SW No. (Rch) R1 R2 R3 R4 R5 R6 R7 R8 R1 R2 R3 R4 R5 R6

CD1 000010 111000

MD/TAPE1 000100 011000

VIDEO1 0 0 0 0 0 0 1 1 0 0 1 0
VIDEO2 0 0 0 0 0 0 1 1 1 0 0 1
VIDEO3 0 0 0 0 0 0 1 1 1 0 0 0
VIDEO4 0 0 0 0 0 0 1 1 1 0 0 0

AV AUX 00 0000 1 11100

PHONO 0 1 0 0 0 0 1 1 1 0 0 0

10 11
19 18
L7 L8
R7 R8

00
00
00
00
00
10
01
00
00

00

CIRCUIT DESCRIPTION

P0 P1 P2 P3 P4 P5 P6

39

P7

0
0
0
0
0
0
0

*1: ANALOG INPUT or DIGITAL INPUT with except STEREO mode
*2: DIGITAL INPUT with STEREO mode
*3: CD2/TAPE2 MONITOR is set CD2 position and L2,R2(REC OUT of CD2/TAPE2) of NJU7312AL is always

used by '0'.

KRF-V7772D/VR-3080

11

CIRCUIT DESCRIPTION

FREQ0

FREQ0

(55 PIN) /FREQ1

FREQ1

( 54 PIN )

32 kHz 44 .1kHz 48kHz Reserved

HLL H
HLHL

AUDIO ( 58 PIN)

Cannel St a tus Bit0 0 1

AU DIO L H

CODEC _ AC 3 (48 PIN )

AC - 3/M P EG D ata Str e am input EXIST NON

AC-3,MPEG,dts(DVD) H L

ADJUSTMENT

PRE OUT

FRONT

SURROUND

CENTER

SUBWOOFER

AM

GND

FM
75Ω

ANTENNA

AUDIO

PHONO

CD1

MD/TAPE1

REC
OUT

PLAY

IN

VIDEO1

REC
OUT

PLAY

IN

VIDEO2

PLAY

IN

VIDEO3

PLAY

IN

VIDEO4
PLAY

IN

CD2/TAPE2

MONITOR

REC
OUT

PLAY

IN

FRONT SPEAKERS

(6-16Ω)

SURROUND SPEAKERS

(6-16Ω)

CENTER

SPEAKER

(6-16Ω)

SWITCHED

TOTAL 100W MAX.

S VIDEO

VIDEO

MONITOR

OUT

VIDEO1
REC
OUT

PLAY

IN

VIDEO2

PLAY

IN

VIDEO3

PLAY

IN

VIDEO4

PLAY

IN

DIGITAL IN

SL16
TEXT

SYSTEM

CONTROL

VIDEO2

OPTICAL OPTICAL COAXIALCOAXIAL

VIDEO3 VIDEO4 CD1

IR RECEIVER

IN

DC12V 15mA

IR REPEATER

OUT

IR OUT

LCD

REMOTE

SL16 XS8

(A)

(B)

(C)

FM SG

FM SG

AG

MPX AG

AC voltmeter

Dummy antenna

Oscilloscope

Distortion meter

ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

RECEIVER
SETTINGS

ALIGNMENT

POINTS

ALIGN FOR

FIG.

(A)

98.0MHz 1kHz,
±40kHz dev.

70dBf (ANT. input)

Connect a

DC voltmeter

between CN2 1

and CN2 2 (X05)

MONO

98.0MHz

L4

(X05-)

0V (a)

DISTORTION

(MONO)

(A)

98.0MHz 1kHz,

±40kHz dev. MONO

70dBf (ANT. input)

(B)

MONO

98.0MHz

L5

(X05-)

Minimum

distortion

(a)

DISTORTION

(STEREO)

(C)

98.0MHz 1kHz,

±40kHz dev.

Selector : L or R Pilot

: ±6kHz dev.

70dBf (ANT. input)

(B)

AUTO

98.0MHz

IFT(RF

FRONTEND

: A1)

(X05-)

Minimum
distortion

(L or R)

(a)

(A)

98.0MHz MONO
1kHz, ±40kHz dev.
25dBf (ANT. input)

(B)

MONO

98.0MHz

VR1

(X05-)

Adjust VR1

and stop at the

point where ED1

(TUNED) goes

on.

(a)

Connect a DC

voltmeter across

each T.P.
CN21 : L
CN22 : R
CN23 : LS
CN24 : RS
CN25 : C
(X09-)

(FRONT 2ch

MODE)

Volume:0

VR1(L)

VR2(R)

VR5(LS)

VR4(RS)

VR3(CENTER)

(X09-)

10mV