Kenwood KRFV-7020-D, KRFV-8020-D, VR-307, VR-309, VR-357 Service manual

AUDIO VIDEO SURROUND RECEIVER

- –

KRF-V7020D/V8020D VR-307/309/357

SERVICE MANUAL

KENWOOD badge (B43-0302-04)

Knob (K27-2293-04)

Knob (K29-7370-02)

Phone jack (E11-0127-05)

Font glass (B10-3458-02)

Knob (K29-7370-02)

Knob (K29-7323-03)

Knob (K29-7326-04)

Knob (K29-7325-04)

Foot (J02-1407-03)

Miniature phone jack (E11-0293-05)

Lock terminal board (E70-0052-05)

Slide switch (S62-0034-04)

Phono jack (4Px2) (E63-0046-15)

Phono jack (E63-0093-05)

Phono jack (E63-0094-05)

Phono jack (6Px2) (E63-0047-15)

Screw terminal board (E70-0100-05)

Phono jack (E63-1080-05)

Optical receiving module (W02-1181-05)

Phono jack (E63-0164-05)

Power cord bushing (J42-0083-05)

Slide switch (S62-0001-04)

AC outlet (E03-0148-05)

Lock terminal board (E70-0047-05)

AC power cord (E30-2605-05)

Metallic cabinet (A01-3685-01)

Illustration is KRF-V7020D(Y).

Remote Controller

Model Destinations Parts number Model name Battery Cover

KRF-V7020D

X7,C7,Y7,V7,M7 A70-1268-05 RC-R0712 A09-1123-08

KRF-V8020D

X8 A70-1275-05 RC-R0508 A09-0366-08

KRF-V8020D

C8,I8,Y8,M8 A70-1277-05 RC-R0608 A09-0366-08

VR-307

K6,P6 A70-1268-05 RC-R0712 A09-1123-08

VR-309

K8,P8 A70-1277-05 RC-R0608 A09-0366-08

VR-357

K7,P7 A70-1277-05 RC-R0608 A09-0366-08

Resetting the Microcomputer

If 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 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.

With the power cord plugged in, turn the POWER key OFF. Then, while holding down the ON/STANDBY key, press POWER.

For U.S.A. and Canada

For other countries

•

FM (T90-0836-05)

RC-R0508/R0608 RC-R0712

Battery cover (A09-0366-08) Battery cover (A09-1123-08)

(E03-0115-05)

indoor antenna (1)

(T90-0833-05)

Loop antenna stand (1)

Batteries (R03/AAA) (4)

*AC plug adaptor (1)

*Use to adapt the

plug on the power cord to the shape

of the wall outlet.

(Accessory only for regions where use is necessary.)

AM loop antenna (1)

Remote control unit (1)Remote control unit (1)

KRF-V7020D/V8020D/VR-307/309/357

CONTENTS / ACCESSORIES / CAUTIONS

CONTENTS / ACCESSORIES / CAUTIONS...............2

DISASSEMBLY FOR REPAIR.....................................3

CONTROLS.................................................................4

BLOCK DIAGRAM.......................................................6

CIRCUIT DESCRIPTION.............................................7

ADJUSTMENT.......................................................... 14

Accessories

WIRING DIAGRAM....................................................15

PC BOARD ................................................................16

SCHEMATIC DIAGRAM............................................21

EXPLODED VIEW .....................................................35

PARTS LIST...............................................................36

SPECIFICATIONS.....................................................45

Model name vs remote controller

Cautions

KRF-V7020D/V8020D/VR-307/309/357

DISASSEMBLY FOR REPAIR

1. Remove the 8 screws (1,2,3),

remove the rear panel.

2. Connect the GND of the rear panel and the chassis, the GND of the mounting hardware and the chassis with 2 alligators clip (4)

8 FUNCTION SHIFT key

Use in combination with the numeric keys to execute alternate commands.

9 Numeric keys

Provide functions identical to those of the original remote control supplied with the component you are controlling. To access the functions printed above the keys, press within 3 seconds of pressing the FUNCTION SHIFT key. Function availability varies for each component.

0 SHIFT key

Use in combination with the AUDIO and VIDEO keys to change the remote control mode without changing the input selector or in combination with the POWER key to turn on and off components programmed into the remote control.

! TV selector key

Sets the remote control to operate a TV or cable box. This key does not change the input selector on the receiver.

@ AUDIO selector key

Selects the audio inputs and sets the remote control to operate the respective KENWOOD audio component. If you connect audio components from KENWOOD and other makers to the MD/ TAPE or CD jacks, you can set the remote control to operate these components by registering the appropriate setup code at the respective input.

# GUIDE key

Use to activate the OSD menu functions of registered components.

$ VOLUME key

Use to adjust the receiver volume.

% MUTE key

Use to temporarily mute the sound.

^ SOUND key

Use to adjust the sound quality and ambience effects.

& LISTEN MODE key

Use to select the listening mode.

* SETUP key

Use to select the surround sound settings.

1 POWER key

Use to turn the receiver on and off. Use in combination with the input selector (AUDIO, VIDEO, or TV) keys and SHIFT key to turn various components on and off.

2 MACRO key

Use in combination with the AUDIO, VIDEO, or TV keys to execute a series of commands automatically (MACRO PLAY).

3 VIDEO selector key

Selects the video inputs and sets the remote control to operate the component registered at the respective input.

4 Multi control keys

Use to operate the selected component.

5 REC key

Use to operate the selected component.

6 TUNING/SKIP key

Use during the setup procedure to specify various settings. Use to operate the tuner or selected component.

7 SUBWOOFER key

Use in combination with the VOLUME +/– keys to adjust the volume of the subwoofer.

There are some cases in which keys (or knobs) that have the same function on the receiver and on the remote control have different names. In the instructions of this manual, if the names of corresponding keys (or knobs) on the receiver and remote control are different, the name of the remote control key is indicated in parentheses.

Remote control unit (RC-R0608 / R0508)

Display

Speaker selection indicators Input channel indicators Output channel indicators

AUTO SOUND indicator

Band indicators

AUTO indicator MEMO. indicator ST. indicator

TUNED indicator

3 STEREO indicator STEREO indicator

1 POWER key

(For U.S.A. and Canada)

Use to turn the power ON/OFF.

STANDBY indicator

1 ON/STANDBY (

) key

(Except for U.S.A. and Canada)

Use to switch the power ON/STANDBY when the POWER is turned ON.

STANDBY indicator

2 POWER key

(Except for U.S.A. and Canada)

Use to turn the main power ON/OFF.

3 Surround indicators

÷ DTS indicator

Lights when the receiver is in the DTS mode. (For VR-309, KRF-V8020D)

÷ DOLBY DIGITAL indicator

Lights when the receiver is in the Dolby Digital mode.

÷ VIRTUAL SURROUND indicator

Lights when the receiver is in the Virtual Surround mode.

4 DIMMER key

Use to adjust the brightness of the display. Use to select the REC MODE.

5 P.CALL keys

Use to call up previously registered radio stations.

6 BAND key

Use to select the broadcast band.

7 AUTO key

Use to select the auto tuning mode.

8 MEMORY key

Use to store radio stations in the preset memory.

9 VOLUME CONTROL knob 0 PHONES jack

Use for headphone listening.

! SPEAKERS A/B keys

Use to turn the speakers ON/OFF.

@ BASS BOOST key

Use to select the maximum adjustment setting for the low frequency range.

About the STANDBY indicator

This unit has a STANDBY indicator. When the STANDBY indicator is lit, the unit consumes a small amount of power to preserve the memory. This is called STANDBY mode. This mode also lets you turn the power ON using the remote control.

Frequency display, Input display, Preset channel display, Surround mode display

Speaker indicator

CLIP indicator

PRO LOGIC indicator

DIGITAL indicator S.DIRECT indicator

MONITOR indicator

DOWNMIX indicator

# MONITOR key $ SOURCE DIRECT key % INPUT MODE key

Use to switch between the digital and analog inputs.

^ LISTEN MODE key

Use to select the listening mode.

& SOUND key

Use to adjust the sound quality and amb ence effects.

* SETUP key

Use to select the surround sound settings

( MULTI CONTROL knob

Used to make a variety of settings.

) INPUT SELECTOR knob

Use to select the input sources.

For U.S.A.

and Canada

MUTE indicator

For VR-307, VR-357 KRF-V7020D

KRF-V7020D/V8020D/VR-307/309/357

MUTE

CLIP

AV SURROUND RECEIVER

STANDBY

POWER

ON / STANDBY

STANDBY

ON / STANDBY

POWER

- ON – OFF

PHONES

LFE

SPEAKERS

DOLBY DIGITAL

VIRTUAL SURROUND

DTS

DOLBY DIGITAL

VIRTUAL SURROUND

BASS BOOST

4 6 75

P.CALL P.CALL

DIMMER

SOURCE

INPUT MODE LISTEN MODE

MONITOR

DIRECT

BAND

MULTI CONTROL INPUT SELECTOR

SOUND

SETUP

AUTO SOUND

PRO LOGIC

AM MHz

3 STEREO

kHz

DOWNMIX

AUTO

DIGITAL

MEMO.

S.DIRECT

MONITOR

ST.

TUNED

MEMORY

)(%$#@!0 ^ &*

VOLUME CONTROL

DOWN

POWER

SHIFTMACRO

AUDIO

TVVIDEO

P. CALL P. CALL

BAND

4¢

GUIDEREC

VOLUMETUNING/SKIP

MUTE

LISTEN

SOUNDSUBWOOFER

MODE

FUNCTION

SHIFT

THEME FAVMENU

INFO ALT AUDTV/SAT/VID

REPEAT RANDOM+100

DISPLAY

SETUP

231

564

897

ENT+10

! @

$ % ^

& *

CONTROLS

Remote control unit (RC-R0712)

AUTO (7)key

If tuner is selected as the input source, this key functions as the AUTO key. If CD or MD is selected as the input source, this key functions as the stop key.

TUNING (1 ¡) keys

If tuner is selected as the input source, these keys function as tuning keys. If CD or MD is selected as the input source, these keys function as search keys.

P.CALL (4 ¢) keys

If tuner is selected as the input source, these keys function as P.CALL keys. If CD or MD is selected as the input source, these keys function as skip keys.

3 LISTEN MODE key

Use to select the listening mode.

4 MUTE key

Use to temporarily mute the sound.

5 SOUND key

Use to adjust the sound quality and ambience effects.

6 MULTI CONTROL key

Used to make a variety of settings.

1 Numeric keys

If CD or MD is selected as the input source, these keys function as numeric keys. If tuner is selected as the input source, these keys are used to call up station presets.

2 Component operation keys

Use these keys to operate other components with system control connections to the receiver.

2 key

If tape is selected as the input source, this key functions as the play key for side B of the cassette (the side facing away from the front of the deck).

BAND (6) key

If tuner is selected as the input source, this key functions as the band selector key. If CD is selected as the input source, this key functions as the play/pause key. If MD is selected as the input source, this key functions as the play key.

DISC SKIP, A/B, +100 key

If CD is selected as the input source, this key functions as the multi-CD player disc skip key. If TAPE is selected as the input source, this (A and B) of a double cassette deck.

7 DVD CONT key

Used to operate DVD player. While holding this key depressed, press any of the keys masked in gray inthe above illustration to operate the corresponding function of a DVD player from KENWOOD. Keys 3, 4, 5, 9 and ! are given the following functions during the DVD player control operation.

3 :TITLE 4 :ENTER 5 :SUB TITLE 9 :MENU ! :OSD

For details, refer to the instruction manual of your DVD player.

8 POWER key

Use to switch the power ON/STANDBY when the POWER is turned ON.

9 SOURCE DIRECT key 0 VOLUME CONTROL key ! SETUP key

Use to select the surround sound settings.

@ MONITOR key # Input selector keys

Use to select the receiver's input source.

123

267

3 4

1 TUNING ¡4 P.CALL ¢

MULTI CONTROL

LISTEN

MODE

TITLE

SOUND

SUB TITLE

VOL.DOWN

MD/TAPE TUNER CD PHONO

DVD CONT VIDEO 1 VIDEO 2 VIDEO 3

REMOTE CONTROL UNIT

VOL.UP

MUTE

ENTER

RC-R0712

POWER

0456

+107

DISC SKIP

A/B +100AUTOBAND



S.DIRECT

SET UP

OSD

MONITOR

9 0

CONTROLS

KRF-V7020D/V8020D/VR-307/309/357

LINE BUF

PHONO EQ

X05

IC16

NJM2279M

CS4226

LPFLPF LPF LPF

x2x2 x2 x1

M62446SP

6ch E. VOL

with 2ch

TONE CONT.

x0.5

BUF

STK411-230

STK410-030

+20/0dB

+B HITAP

-B HITAP

+B LOWTAP

-B LOWTAP

CD COXIAL

OPTICAL

VIDEO2

DIGITAL

VIDEO3

VIDEO2

VIDEO1

PHONO

TAPE

/MD

MONIPLAY

MONI

/MD

TAPE

VIDEO1

VIDEO3

VIDEO2

VIDEO1

MONITOR

S-VIDEO IN

REC OUT

Lch

H, P, Rch

H, P, Lch

Rch

Cch

Lch Rch

LSch

RSch

SWch PRE OUT

SP-B

SP-A

AC IN

+5V A.V.R

for u-COM

+15V A.V.R

A.V.R

-15V

+5V

+7V

-7V

A.V.R

for E. VOL

for

u-COM

for FIL AC

(AUDIO and VISUAL) TUNER etc.

for AMP (HI TAP)

for AMP (LOW TAP)

for RELAY SW

TC9163

TC9164

IC6(1/3)

IC7(3/3)

IC7(1/3)

IC7(2/3)

IC6

IC8

IC6(2/3)

VIDEO (Y)SEL

(NOT for K,P TYPE)

SWITCHED

D1,4

IC1

IC2

-30V

IC13

IC1IC2

IC8 (2/2)

IC8 (1/2)

IC9

IC7

IC5

IC11

Q10

Q13

Q11

Q12

IC4

IC3

2.0V/2.2KSWch

PRE OUTPUT

CXP82852-139Q

u-COM

INPUT SEL.

TUNER

TC9162

D1-4

(1/2)

(2/2)

(1/2)

(2/2)

IC10

IC12

IC11

IC12

SP. OUTPUT 5CH. SP. 28.3V/8

COXIAL

VIDEO3

SUB

DIG

L,R

MIX IC10

LS,RS

NOSUB

ANA

REC OUT BUF

IC9

IC6(3/3)

ANALOG REC

DIGITAL REC

Q43

Q44

A.V.R

for

for DSP

A.V.R

3.3V

IC14

6dB ATT MUTE

SYNC

AC3 DECODER

SUB DSP

ABYSS902

YSS902 SDIBSEL=0

SDIBSEL=1

(VISUAL IN/OUT)

DSP

IC1

Lch

Rch

Cch

LSch

RSch

SWch

NJM2279M

IC17 VIDEO (C)SEL

AD/DA etc.

for DSP

-5V A.V.R

IC19

A.V.R

IC18

IC12

for DIR.

A.V.R

NJM2279M

VIDEO SEL

IC4

MONITOR

VIDEO 1

VIDEO 2

VIDEO 3

VIDEO OUT

VIDEO IN

200mV/2.2K

200mV/47K

OUT

2.5mV/27K

(AUDIO IN/OUT)

PHONO

OTHER

KRF-V8020D,VR-209

USED

S-VIDEO OUT

1Vp-p/75

0.286Vp-p/75C

S-VIDEO IN/OUT

(VISUAL IN/OUT)

1Vp-p/75

VIDEO IN/OUT

IC51

LFE

BYPASS

LS,RS

L, R

DIR

C LS/RS L/R

4700uF

3300uF

470uF

2200uF

3300uF

2200uF

LR LS,RS C,LFE

L,R

C,SUB

L,R

LS,RS

Y C

KRF-V7020D/V8020D

(X00)

(X08)

(X09)

(X08)

VR-307/309/357

KRF-V7020D/V8020D/VR-307/309/357

BLOCK DIAGRAM

CIRCUIT DESCRIPTION

(0 : Pull down, 1 : Pull up)

TYPE BAND

Reception frequency

Channel

PLL standard

Diode sw

space

frequency

DSW3 DSW2 DSW1 DSW0

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

0000

1700

AM 530kHz~1700kHz 10kHz +450kHz 10kHz

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

0001

1610

AM 530kHz~1610kHz 10kHz +450kHz 10kHz

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

1010

1700 RBDS

AM 530kHz~1700kHz 10kHz +450kHz 10kHz

FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz

0011

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

FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz

RDS

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

RDS

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)

77 76 75 74

1. The back up item and initialization condition

1-1 Back up

• POWER : POWER OFF

• VOLUME LEVEL : -66dB

• AUDIO INPUT SELECTOR : TUNER

• VIDEO INPUT SELECTOR : VIDEO 1

• SPEAKER A : ON

• SPEAKER B : OFF

• BASS : 0dB

• TREBLE : 0dB

• INPUT LEVEL : 0dB

• SOURCE DIRECT : OFF

• MONITOR : OFF

• DIMMER : DIMMER 1 (LIGHTEST)

• LISTEN MODE : STEREO

• VIRTUAL SURROUND : OFF

• INPUT MODE : DIGITAL AUTO

• SUB WOOFER : YES(ON)

• FRONT SP. SIZE : NORMAL

• CENTER SP. SIZE : NORMAL

• SURROUND SP. SIZE : NORMAL

• DISTANCE : Fch 10ft/3m : Cch 10ft/3m : Sch 10ft/3m

KRF-V7020D/V8020D/VR-307/309/357

• FRONT (L,R) LEVEL : 0dB

• CENTER LEVEL : 0dB

• REAR (LS,RS) LEVEL : 0dB

• SUB WOOER LEVEL : 0dB

• MIDNIGHT : OFF

• BAND : FM

• FM FREQUENCY : 87.50MHz

• AM FREQUENCY : 531kHz(CH.SPACE 9kHz) : 530kHz(CH.SPACE 10kHz)

• PRESET CH. : [ --ch ]

• PRESET MEMORY FREQUENCY : PRESET MEMORY

FREQUENCY

• TUNING MODE : AUTO

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.

2. Condition by the destination or model

3. TEST MODE

[setting method]

While pressing INPUT SELECTOR key, plug the AC power cord into an AC outlet (K, P type) or turn on the AC POWER switch. When a set is set up in test mode condition a set becomes the following condition. Automatic POWER ON. All indicator tube (FL) and 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-V7020D/V8020D/VR-307/309/357

FL DISPLAY (X09) ED51

11GRID

17SEGMENT

(X09) S517

SERIAL

BUSY DATA

VOLUME

ENCODER

(X09) S519

MULTI

ENCODER

(X09) S518

SELECTOR

ENCODER

(X09)

X4 X1

8.0MHz CE RESET

AUDIO MUTE TUNER MUTE

TUNER (X05) IC2

(X05) IC1

-20dB ATT

SD STEREO

11-MT-120GK

LED

(PEAK. LEVEL)

(DOLBY DIGITAL)

(STANDBY)

(X09) IC6,7

AUDIO SELECTOR

(X09) IC51

(X08) IC4,16,17

NJM2279M

(X09) A501 REMOCON

VIDEO SELECTOR IC

TC9163/9164

CXP82852-139Q

(X00) POWER Relay - (K1)

SP. A RELAY - (K1) SP. B RELAY - (K2)

SURR RELAY - (K3)

CENTER RELAY - (K4)

(X08) IC1

DSP IC

(X08) IC2

DIR, ADC, DAC

YSS902 or YSS912

CS4226KQG

(CRYSTAL)

(X08) IC5

FUNCTION SW

(X08) IC11

VOLUME IC

M62446FP

LC72131

TC9162

KR0

KR1

KR2

KS0 P.CH DOWN ON/STANDBY SPEAKER A

KS1 P.CH UP DIMMER SPEAKER B

KS2 BAND LISTEN MODE DOLBY VIRTUAL

KS3 AUTO SOUND MONITOR

KS4 MEMORY SETUP SOURCE DIRECT

KS5 INPUT MODE

KS6 DSW0 DSW1 DSW2

KS7

* No. of : u -COM Port NO.

DSW3 DSW (AC3)

Key matrix

CIRCUIT DESCRIPTION

4. Microprocessor CXP82852-139Q(X09 : IC51)

4-1 Microprocessor periphery block diagram

KRF-V7020D/V8020D/VR-307/309/357

CIRCUIT DESCRIPTION

4-2 Pin description

Pin No. Pin Name I/O Description

1,2 G10,11 O Display grids 10,11

3 None - Ic test mode port.

4,5 None I No connect

6 AUDIO I Audio signal detection port. L=AUDIO. 7 VOL.ENC.A I Volume encoder A(clockwise) input. 8 REMOCON I Remote contol signal input.

9 VOL.ENC.B I Volume encoder B(counterclockwise) input. 10,11 None O Ic test mode port. 12-14 KR0-2 I Key return 0-2.

15 PROTECT I Protection signal detection port. H=PROTECT. 16 S.DATA I/O Serial DATA signal. 17 S.BUSY I/O Serial BUSY signal. 18 SP.A+B O Speaker on both A sp. and B sp. 19 SW.6dB.ATT O Sub woofer 6dB attenuation 20 SEL.ENC.A I Selector encoder A(clockwise) input. 21 SEL.ENC.B I Selector encoder B(counterclockwise) input. 22 MULTI.ENC.A I Multi encoder A(clockwise) input. 23 MULTI.ENC.B I Multi encoder B(counterclockwise) input. 24 SL16/XS8 I SL16/XS8 selector. H=16bit. 25 DSP.SCK O DSP(YSS902/912) CLOCK output. 26 DSP.SI I DSP(YSS902/912) DATA input. 27 DSP.SO O DSP(YSS902/912) DATA output. 28 Vdd - Analog power supply(+5V) 29 None I No connect 30 CH.SPACE O Channel space chengeover H=E1 type 31 DSP.CS O DSP(YSS902/912) CS output. 32 CODEC.CS O CS4226 CS output. 33 PLL.DO I Pll ic DO signal input . 34 PLL.ST I Tuner STEREO signal detection port. L=STEREO. 35 PLL.SD I Tuner SD signal detection port. L=TUNED. 36 RCV.CE I Receiver CHIP ENABLE signal port. L=ENABLE. 37 Avss - Analog GND. 38 RESET I Microproessor RESET signal.

39,40 8MHz I Main clock generation(8MHz).

41 Vss - Microprocessor GND. 42 None I No connect 43 TEX - GND. 44 Vdd - Power supply(+5V). 45 Vfdp - Power supply(-33V). 46 SEL.ST1 O TC9162AF/63AF/64AF ST1 output. H=LATCH. 47 PLL.DT O Pll ic DATA signal output . 48 PLL.CK O Pll ic CLOCK signal output . 49 PLL.CE O Pll ic CE signal output . 50 T.TUNE O Tuner mute control. L=MUTE ON 51 A.MUTE O Audio mute control. L=MUTE ON 52 SEL.ST2 O TC9163/9164 ST2 output 53 20dB.ATT O Volume 20dB attenuation control. H=ATT. OFF 54 VOL.DT O Volume ic (M62446SP) DATA control. 55 VOL.CK O Volume ic (M62447SP) CLOCK control. H=ACTIVE 56 VOL.ST O Volume ic (M62448SP) ST control. H=ACTIVE 57 DSP.SCB O DSP(YSS902/912) chip selector 58 VCR.A O Video ic (NJM2279M) cont1 control. H/L=STATIC 59 VCR.B O Video ic (NJM2279M) cont3 control. H/L=STATIC 60 FA.RLY O Front A speaker relay control. H=RELAY ON

KRF-V7020D/V8020D/VR-307/309/357

CIRCUIT DESCRIPTION

Pin No. Pin Name I/O Description

61 FB.RLY O Front B speaker relay control. H=RELAY ON. 62 C.RLY O Center speaker relay control. H=RELAY ON 63 S.RLY O Rear speaker relay control. H=RELAY ON 64 POWER.RLY O Power relay control. H=RERAY ON 65 STANDBY.LED O Standby LED control.H=LED ON 66 DOL.DIG.LED O Dolby digital LED control.H=LED ON 67 DOL.VIR.LED O Dolby virtual LDE control.H=LED ON 68 DTS LED O DTS LED control. H=LED ON

69,70 None O No connect

71 PACk CTL O Non oscillation of power pack ic at power off. L=STOP OSCILLATION 72 DSP.IC O DSP(YSS902/912)/CS4226 initial clear .

73 None O No connect 74-81 P1-8/KS7-0 O Display segments 1-8 & key scan 7-0. 82-88 P9-15 O Display segments 9-15.

89 Vdd O Microprocessor power supply(+5V)

90,91 P16,17 O Display segments 16,17

92-100 G1-9 O Display grids 1-9.

CPO

SDOA0

567

878670

59 61

42 ~ 44

25 ~ 29

92 ~ 99

32 ~ 39

SDOA1

SDOA2

SDIB0

SDIB1

SDIB2

SDIB3

RAMD0~7

72 ~ 79

RAMCEN

RAMWEN

RAMOEN

RAMA0~16

OVFB

SDOB INTERFACE

SDIB INTERFACE

SDOA INTERFACE

SDIA INTERFACE

CRC

SDIASEL

SDIBSEL

IPORT0~7

CONT.

/SDBCK0

SDBCK0

SDWCK0

SDIA0

SDIA1

SURENC

STREAM0~7

OPERATION

CLOCK (30MHz)

KARAOKE

MUTE

CRC AC3DATA DTSDATA

NONPCM

PLL

DELAY RAM

L, R

Ls, Rs

C, LFE

INPUT

BUFFER

CONTROL REGISTER

U-COM INTERFACE

24 * 24

Main DSP

Dolby digital/ProLogic/DTS

DECODER

COEFFICIENT

PROGRAM

RAM

24 * 16

Sub DSP

DATA RAM

SDOB3

RAMD : RAM data RAMA : RAM address

SDOB2

SDOB1

SDOB0

SDWCK1

SDBCK1

EXT. RAM

INTERFACE

CONT.

SDOACKSEL

SDIBCKSEL

SDOBCKSEL

ERAMUSE

/CS

SCK

OPORT0~7

/CSB

SCK

5. Dolby digital/DTS IC: YSS902/YSS912 (X08: IC1)

5-1 Block diagram (YSS912)

CIRCUIT DESCRIPTION

KRF-V7020D/V8020D/VR-307/309/357

CIRCUIT DESCRIPTION

5-2 Pin description

Pin No. Pin Name I/O Descriptions

1 Vdd1 - Power supply(+5V) 2~4 - - No connect 5~7 SDIB0~2 O PCM output port for sub DSP

8 XI I Crystal oscillation port.(902:6.25~50.0MHz,912:12.288MHz)

9 XO O Crystal oscillation port.

10 Vss - GND 11 AVdd - Power supply(+3.3V) for PLL

12~18 - - No connect

19 CPO O PLL output port. 20 AVss I GND 21 Vdd2 - Power supply(+3.3V) 22 SDOA2 O PCM output port from main DSP 23 - - No connect 24 SDOA0 O PCM output port from main DSP

25~29 - - No connect

30 Vss - GND 31 Vdd1 - Power supply(+5V) 32 - - No connect 33 OPORT1 O -

34~39 - - No connect

40 Vss - GND 41 Vdd2 - Power supply(+3.3V)

42-44 - - No connect

45 SDO2 O PCM output port from sub DSP(C,LFE/SWch) 46 SDO1 O PCM output port from sub DSP(LS,RSch) 47 SDO0 O PCM output port from sub DSP(FL,FRch)

48,49 - - No connect

50 Vss - GND 51 Vdd2 - Power supply(+3.3V)

52~59 - - No connect

60 Vss - GND 61 - - No connect 62 /IC I Initial clear port.

63,64 - - No connect

66 /CS I Microprocessor interface chip selector input port. 67 SO O Microprocessor interface serial data output port. 68 SI I Microprocessor interface serial data input port. 69 SCK I Microprocessor interface clock input port. 70 - - No connect 71 Vdd1 - Power supply(+5V)

72~79 - - No connect

80 Vss - GND 81 Vdd2 - Power supply(+3.3V) 82 SDIWCK 0 I Word clock for SD input ports. 83 SDIBCK 0 I Bit clock for SD input ports. 84 SDIA I AC3 bit stream data input port.

85~89 - - No connect

90 Vss - GND 91 Vdd2 - Power supply(+3.3V)

92,93 - - No connect

94 IPORT5 I Input port register 95 - - No connect

96~99 IPORT3~0 I Input port register

100 Vss - GND

+ 25 hidden pages

Kenwood KRFV-7020-D, KRFV-8020-D, VR-307, VR-309, VR-357 Service manual

CONTENTS / ACCESSORIES / CAUTIONS

Contents

Accessories

Model name vs remote controller

Cautions

DISASSEMBLY FOR REPAIR

Remote control unit (RC-R0608 / R0508)

CONTROLS

Remote control unit (RC-R0712)

BLOCK DIAGRAM

CIRCUIT DESCRIPTION

1. The back up item and initialization condition

2. Condition by the destination or model

3. TEST MODE

4. Microprocessor CXP82852-139Q(X09 : IC51)

5. Dolby digital/DTS IC: YSS902/YSS912 (X08: IC1)