Kenwood KVT-715DVD, KVT-725DVD Service Manual

MONITOR WITH DVD RECEIVER

KVT-7 15DVD,7 25DVD/-B KVT-7 35DVD,7 45DVD KVT-7 65DVD,8 15DVD

SERVICE MANUAL

The DVD mechanism information is not in this service manual. Please refer to service manual for X92-4750-00 (B53-0052-00).

Metallic cabinet (A01-2837-02)

TO 5L-I/FTO NAVIGATION I/FTO TV TUNER I/FPREOUT

MONITOR WITH DVD RECEIVER

Cord with plug (E30-6301-05)

Screw set (N99-1558-05)

Cord with connector (E30-4953-05)

Plastic cabinet assy (A02-2723-03)

*Screw set (N99-1723-05)

*DC cord (E30-6337-05)

KVT-715DVD (K type)

*Escutcheon (B07-3022-02) (B07-3058-02)

*Antena adaptor (T90-0512-05)

*DC cord (E30-6338-05)

*Mounting hardware (J21-9784-04) x2

Lever (D10-4589-04) x2

*Cord with connector (E30-6339-05)

Mounting hardware assy (J21-9934-03)

Remote controller (A70-2064-05 : RC-DV420)

*Cord with connector (E30-6340-05)

*Depends on the model. Refer to the parts list.

KVT-715DVD,725DVD/-B,735DVD

ELECTRIC UNIT (X34-315)

LX I/F

NAVI I/F

u-COM

to X14

to TV

u-COM

AUDIO SELECTOR

u-COM

SELECTOR

AUDIO

AUDIO SW2

AUDIO SW1

VISUAL SW1

VIDEO SW

SYSTEM u-COM

VISUAL SW2

VIDEO SW

SYSTEM u-COM

RGB SW

u-COM

V

R

L

AV IN

VIDEO SW

u-COM

SYNC SEP. MM1108XFFE

INPUT SELECTOR

SELECTOR

OUTPUT

SOFT MUTE

u-COM

BUFF

u-COM

PROCESSOR

AUDIO

HPFILTER

+20 ~ -79dB LPFILTER

u-COM

MUTE

MUTE PRE

L R

FRONT

R

L

REAR

R

L

NF

PRE OUT

R

L

V

AV OUT

MUTE

MUTE SUB OUT

75

BUFF

DRIVER

u-COM

SYSTEM

BUFF

RDS DECODER

u-COM

(F/R)

POWER IC

SP OUT

(F/E)

SW5V

u-COM

ANT IN

u-COM

4ch OUT

6dB AMP 75

NJM2267Vx2

IC300

(E)TYPE ONLY

BA3121F

ISO AMP

TC4052BFT

BA7652F

BA7612F

MM1234XFBE

MM1503

DRIVER

BA3121F

ISO AMP

BA3121F

ISO AMP

TC7SH08F

BUFF

E-TDA7414

TDA7401

NJM4565

AMP

NJM4565

AMP

NJM4565

AMP

TB2903H

TDA7479D

IC301

IC554

IC550

IC553

IC555

IC501

IC551

IC552

IC450,451

IC200

IC103

IC250

3

8RESET

MUTE

REQC

REQH

DATAC

DATAH

CLK

CHCON

3

2 TX RX

RESET

REMO

MUTE

M CON

M CLK

M DATAH

M DATAC

M REQH

M REQC

OOMP GND

COMP V

COMP GND

COMP V

RGB GND

B

G

R

DVD R

DVD L

3

7

TV L

TV R

TV COMP V

R G B

SC DATA

SC REQ

MC DATA

MC REQ

BP CLK

SC CON

(REMO)

RESET

6

3

0 1 2 3

2

3

0

2

1

2 3

S2

1

S1

2

2 3

S1

S2

1

2

SW

3

CTL

1

2

CDAUX CD MD MPX/A

MAIN

SELECTO

SUB

2

ACIN 0

ACIN 1 ACIN 2 ACIN 3

MID

REAR

FRONT

FREE

SMETER

QUAL

DCERR

AFS

SMUTE

SDA

SCL

WIN IN

6

2

AB

2

BA

HP-FL HP-FR HP-RL HP-RR

AUX-L AUX-R

NF

FRONT

REAR

SDA

SCL

2

IN (FRONT) IN (REAR)

DC OFFSET STBY

SVR PMUTE BEEP

4

3

MPX

RDCL

RDDA

QUAL

OUT

16

SMETER A OUT

IF COUNT SDA SCL

AM IN

FM IN

VDD 5V

4

ILL

GND

B.U

LINE MUTE EXT AMP CONT P.CON ANT.CON

FL,FR,RL,RR

6

4

AC

SUB

2

KVT-745DVD,765D VD,815DVD

● ELECTRIC UNIT

BLOCK DIAGRAM

POWER SUPPLY

(X14-939)

VIDEO CONTROL UNIT

from X14 MCU

MOTOR DRIVER

from X14 MCU

OR

to X14 MCU from X14 MCU

to ROM WRITER

RGB SW

CLAMP

(E) TYPE ONLY

+DRIVER+MUTE

LPF+6dB amp

ENCODER

VIDEO

DECODER

MPEG

OSC

27MHz

SYS COM

EEPROM

2ch AUDIO DAC

MUTE

COAX DRIVER

COAX

to BOX MCU

to X34 (ELECTRIC UNIT)

to DVD MECHANISM ASSY

to X14 MCU

DC CONNECTOR

TRANCE

DC/DC

REG

REG SRAM

MPU

to X16 (SUB CIRCUIT UNIT)

to X35 (VIDEO UNIT)

LB1836LB1836

OSD IC LC74735NW9817EMB29LV8T9TN6R

FROM

DC/DC

CHROMA & AN2546FH-AV

IC

NJW1303V

SYNC SEP

MM1234XFBE

RGB SW

E2PROM

MM1389XFBE

70F3089YGJ-7R5

SYS COM

ADV7170KSU

ES6218SF

MT48LC4M16T75I

SDRAM

29LV160AT17R2

FLASH SRAM

K6F1008V2CYF55

MM1567AJBE

AK4382AVT

FPGA M4A3212V18TV1

NJM4580V

LPF

IC401 IC400

IC202 IC203

IC303

IC103

IC104

IC100

IC101

IC102

IC108

IC521IC520

IC770

IC703

IC701

IC204

IC200

IC541

IC560

IC601 IC652

IC650

IC304

IC362

IC200

IC204

I/F CONNECTOR

CN501

LCD CONTROL

LCD CS LCD DATA LCD CLK

EJECT

KEY CONTROL

SRC

RESET

KEY2

REMO LED R,G,B LED SW

SRM MO12

SRM MO11

2

SRM MO22

SRM MO21

2

OSD DATA OSD CLK OSD CS OSD RST

OSD RG

HD,VD

HSY,VSY

RGB

VCO

CLAM

POLC

POLS

3

BLK (MASK)

VMUTE

CSYNC

AUTO DIMMER PH DET MEC SW A,B,C KEY1 VOL1 VOL2 BL DET

MEC SW D

XDATA,YDATA

POS D

NTSC PAL

HPOSI1,2,3,4

MODE1,2,3

X0,Y0,Y1

PWM

SCL

SDA

(12C BAS)

M CLK

FROM VPP

S DATA

M DATA

RESET

SYNC SW

TV,NAVI RG

COMPOSIT

DVDRGB

DVDCOMP V

DVDRGB DVDCOMP V

CCIR601 [7:0]

VCLOCK

VSYNC

HSYNC

DATABUS [15:0] SDRAM CLK

RGB SW

VIDEO

ATAPI I/F

LOCAL I/F

BCLK

DATAI

LRCLK MCLK

SPDIF

R REQ M CLK S DATA

S REQ M DATA

SYS ON

ADACML ADACMC ADACMD ADACRST

27MHz CS

CPUA [1:0] CPUA17

CPUD [3:0]

SYSTEM DATABUS [15:00]

REMO

ACC DET REV DET PRK DET

ACC REVERSE ILLUMI

BU14.4

GND

PRK SW

+14.4

PON

8.5V

PON

+14.4 SW5V

MECHA7V

+14.4

PON SW3

+7.5V

SW2V

+7V -7V

BU5V

BU3.3V

+14.4

NTSC/PAL

AUDIO

DOWN MIX

● VIDEO CONTROL UNIT

3

BLOCK DIAGRAM

KVT-715DVD,725DVD/-B,735DVD

KVT-745DVD,765D VD,815DVD

KVT-715DVD,725DVD/-B,735DVD KVT-745DVD,765D VD,815DVD

● VIDEO UNIT

VIDEO UNIT (X35-4280-01)

CN301

1

P ON+5.0V

2

P ON+5.0V

3

NC

4

V GND

5

V GND

6

SW+18.5V

7

D GND

VOL-

VOL+

LED GND

BRINK

LED+8.5V(B)

P ON+3.3V

V GND

CSYNC

V GND

NTSC/PAL

POLC POLS

VSY HSY

BLK MODE3 MODE2

MODE1

HPOS4

HPOS3

HPOS2

HPOS1

VCOM

P ON+5.0V

AUTO DIM

KEY1 XDATA YDATA

BL DET

PWM

ENABLE

SW-D

BL GND BL GND

BL+8.5V BL+8.5V

D GND

PH DET

SW+5.0V

REF+5.0V

R SENS

RI M-

RI MRI M+ RI M+ EX MEX M-

EX M+ EX M+

SW-A SW-B SW-C

8

9 10 11 12 13

NC

14 15 16 17

NC

18 19

NC

20 21

VB

22

VG

23

VR

24 25 26 27 28 29 30

NC

31 32 33 34 35 36 37 38 39 40 41

NC

42 43

NC

44 45 46 47 48 49

X0

50

X1

51

Y0

52 53 54 55 56

NC

57 58 59

NC

60 61 62

NC

63 64 65 66 67 68

NC

69 70 71 72 73 74 75 76 77

NC

78 79 80

OPEN/CLOSE

LED+8.5V(G) LED+8.5V(R)

to X14- VIDEO CONTROL UNIT

TC7W14FU

IC304

POLS/POLC/HSY/VSY/BLK

MODE1/2/3/HPOS1/2/3/4/NTSC PAL

OPEN

V.COM

VGND

PON+3.3V

V.SYNC

VR/VG/VB PON+5.0V

PON+3.3V VGND

IC101

IC302

TC7SET08FU

CN303

SW-D

1

SW-C

2

SW-B

3

SW-A

4

NC

5

EX M+

6

EX M+

7

EX M-

8

EX M-

9

RI M+

10

RI M+

11

RI M-

12

RI M-

13

NC

14

R SENS

15

REF+5.0V

16

SW+5.0V

17

PH DET

18 19

NC

BLOCK DIAGRAM

PON-12.0V

DC-DC IC LT1947

H.SYNC

PON+18.5V PON+12.5V

IC203

IC301

TIMMING CONTROLLER TC200G02AF-0104

7 INCH INDASH MECHA

COM AMP TA75W558FU

PDOS/OSCI

PLL & LPF NJM2107F

IC303

USPD/CPV/HDIR/CX/ STV1/STV2/STH1/STH2/ NGOE1/NGOE2/ NGOE3/CPH1

PON-12.0V

VGND

PON+3.3V PON+5.0V

PON+18.5V

V.COM

TOUCH PANEL S79-0827-05

X0/X1/ Y0/Y1

TOUCH PANEL SWITCH CIRCUIT

PON+5.0V XDATA/YDATA

X0/X1/Y0

AUTO DIM/ KEY1

PWM/ENABLE D.GND LED GND BL+8.5V BL GND

LED+8.5V(B) LED+8.5V(R)/LED+8.5V(G) LED GND D.GND OPEN/CLOSE/VOL+/VOLBRINK

STV1 USPD CPV NGOE3 NGOE2 NGOE1 STV2

CPH1

CX HDIR STH1

VB VG VR

STH2

IC401

AUTO DIMMER

SW PCB (B/3)

CN503

30

NC

29

VGL-12.0V

28

NC

27

VSS

26

STV1

25

U/D(UPSD)

24

CPV

23

OE3(NGOE3) OE2(NGOE2)22

21

OE1(NGOE1) STV2

20 19

VDD1+3.3V

18

VDD2+5.0V

17

NC

16

VGH+18.5V

15

NC

14

VCOM

13

VSS

12

VSS

11

CPH(CPH1)

10

VSS

9

CX

8

L/R(HDIR)

7

STH1

6

VSS

5

VB

4

VG

3

STH2VR2

1

NC

SW PCB (C/3)

7 INCH LCD

CFL

BACK LIGHT INVERTER

4

KVT-715DVD,725DVD/-B,735DVD KVT-745DVD,765D VD,815DVD

COMPONENTS DESCRIPTION

● VIDEO CONTROL UNIT (X14-939x-xx)

Ref No. Application / Functions Operation / Condition / Compatibility

IC100 AVR Switching power supply (SW5V, MECHA7V) IC101 AVR Switching power supply (SW3.3V, PANEL MECHA7V) IC102 AVR Switching power supply (±7.5V, BL8.5V) IC103 AVR BU5V output IC104 AVR BU3.3V output IC105 BU detector Reduced voltage detector for BU line IC106 P ON control Power ON control IC IC107 AVR VIDEO7.5V output IC108 AVR SW2V output IC200 E2PROM E2PROM for system microprocessor IC202 Motor driver Slide mechanism motor driver IC203 Motor driver Tilt mechanism motor driver IC204 System microprocessor System control microprocessor IC205 Buffer Remote controller signal buffer IC206 Reset Reset control for system microprocessor IC207 Reset IC Reset IC for system microprocessor IC300 AVR VIDEO5V output IC301 1H DELAY 1H DELAY (for PAL video signal) IC302 RGB sw RGB synchronize signal separator IC303 RGB decoder RGB signal decoder IC304 RGB sw RGB video signal switch (switching for DVD/NAVI, TV) IC305 AVR VIDEO3V output IC306 Muting control Video muting control IC361 Sync mix. Sync mixer for HD and VD sync IC362 Sync sep. Synchronies separator IC363,364 Buffer 3CH buffer (HD, VD signal) IC365 Timing generator HD timing generator (for OSD) IC400 OSD Graphic generator (for OSD) IC401 Flash ROM Font data ROM (for OSD) IC520 Flash ROM FLASH ROM (for MPEG decoder control program) IC521 SRAM SRAM (MPEG decoder backup ROM) IC522 Selector Chip selector for SRAM IC540 Buffer IC 27MHz buffer IC541 Inverter 27MHz oscillator IC560 SDRAM SDRAM (for memory for decode data) IC580 Level shift Level shift (3.3V→5V) IC601 Decoder MPEG decoder IC650 Amp Video signal amp (6dB & LPF) IC651 AVR VIDEO5V output IC652 Encoder Video encoder IC701 LPF Audio LPF

5

KVT-715DVD,725DVD/-B,735DVD KVT-745DVD,765D VD,815DVD

COMPONENTS DESCRIPTION

Ref No. Application / Functions Operation / Condition / Compatibility

IC702 AVR AUDIO5V output IC703 DAC Audio DAC IC750 Driver Digital output driver IC770 Audio & SRAM cont. Audio DAC & SRAM control Q100~103 SW P ON control sw Q104,105 BU det. Reduced voltage detector for BU line Q106 Power FET SW14V output Q107 ACC det. ACC detect control Q108 PARK det. Parking detector Q109 AVR For SW5V, MECHA7V Q110 AVR For SW3.3V, PANEL MECHA7.5V Q111 AVR For ±7.5V, MECHA7V Q112 AVR VIDEO7.5V output Q113~116 AVR FAN driver (12.8V) Q117 AVR cont. Panel mechanism AVR control Q118,119 Current det. BL8.5V over current detector Q120~124 SW Select SW BU5V or SW5V line Q170,171 SW OSC selector (SW5V, MECHA7V) Q172,173 SW OSC selector (SW3.3V, PANEL MECHA7.5V) Q174,175 SW OSC selector (±7.5V, MECHA7V) Q200,201 Illume cont. Illumination control (BLEU) Q202,203 Illume cont. Illumination control (GREEN) Q204,205 Illume cont. Illumination control (RED) Q207 Reset Microprocessor reset control Q300 Selector NTSC/PAL selector (chroma LFC frequency) Q360 Buffer Buffer (Y signal) Q361 Buffer Buffer (C signal) Q362 Buffer Buffer (for V sync separator) Q400 Buffer Buffer (RED signal for OSD) Q401 Buffer Buffer (GREEN signal for OSD) Q402 Buffer Buffer (BLUE signal for OSD) Q403 Selector NTSC/PAL selector (for OSD clock) Q650 Inverter sw Inverter (RGB SW) Q652 Muting Muting for IC650 (6pin) Q701 Muting Audio DMIX L muting Q702 Muting Audio DMIX R muting Q703~707 Audio mute. Audio muting control Q751,752 COAX drv. Drive for coaxial digital output Q901,902 TDF panel AVR cont. TDF panel AVR ON/OFF control

6

KVT-715DVD,725DVD/-B,735DVD KVT-745DVD,765D VD,815DVD

COMPONENTS DESCRIPTION

● ELECTRIC UNIT (X34-315x-xx)

Ref No. Application / Functions Operation / Condition / Compatibility

IC1 AVR AUDIO8.4V AVR (for audio circuit) IC3 AVR VIDEO5V AVR (for video circuit) IC4 AVR ±9.0V AVR (for 5V pre out circuit) IC100 Logic IC Audio muting control IC101 Reset IC When BU voltage less than 3.7V, this IC output is L (Rsest) IC103 System control System microprocessor (control for X32 unit, communication for another unit) IC200 RDS decoder IC RDS signal decoder IC250 Power amp Audio power amp (50W x 4) IC300 Digital audio processor DSP for audio (4ch high pass filter, 2ch low pass filter) IC301 Audio system IC Electrical volume, audio selector, noise chancellor, FM mpx IC350 Amp Isolation amp (for LX BUS) IC400 Logic IC Isolation for navigation signal line and another common line IC450,451 Amp 75Ω video driver & 6dB amp (X34 unit to X14 unit) IC452 Logic IC Reset signal inverter IC500 Amp Isolation amp (for TUNER) IC501 SW RGB selector (TV or NAVI line) IC550,554 4ch multiplexer Select for audio signal (LX or NAVI line, TV or AV IN) IC 551 Video SW IC552 Sync sep. Sync separator (place for NTSC or PAL format signal) IC553 75Ω driver & video sw Select for video signal to X14 unit (TV, AV IN, NAVI) IC555 75Ω driver & video sw Select for video signal to AV out terminal (DVD, TV, AV IN) IC600 Amp Isolation amp (for AV IN) IC602~604 OP AMP For 5V pre out IC702 OP AMP 1/2VCC for IC350 AND IC500 (LX, TV) IC900 OP AMP For noise canceled Q1 BU5V sw Q1 is ON When supplied for BU14V Q2 BU5V sw Q2 is ON When supplied for BU14V Q3 SW5V sw Q3 is ON When Q9 is ON Q4 A9V sw Q4 is ON When supplied for SW14V Q5 V5V sw Q5 is ON When supplied for SW14V Q6 AVR (A9V) Q6 is ON When Q4 is ON Q8 AVR (SW14V) Q8 is ON When P ON line is ON Q9 AVR (SW5V) Q9 is ON When P ON line is ON Q10 SW (V5V) Q10 is ON When Q5 is ON Q11 SW (±9V) Q11 is ON When Q12 is ON Q12 SW (±9V) Q12 is ON When supplied for SW14V Q13~18 AVR -9V output Q19 Illumination sw Q19 is ON when Car Illumination sw is ON Q20 ANT-CONT SW ANT-cont is ON when select for TUNER Q21 SW Q21 is ON when P CONT is ON Q22 SW Q22 is ON when Q21 is ON

Select for composite video signal (IC553 or AV IN) : Use for NTSC/PAL detector and back camera detect

7

KVT-715DVD,725DVD/-B,735DVD KVT-745DVD,765D VD,815DVD

COMPONENTS DESCRIPTION

Ref No. Application / Functions Operation / Condition / Compatibility

Q23 P-ANT SW Q23 is ON when Q20 is ON Q24 SW Q24 is ON when Q25 is ON Q25 SW Q25 is ON When supplied for BU14V and Q25 is OFF When Q22 is ON Q26 BU det. Q26 is ON When supplied for BU detect Q27 EXT-AMP sw Q27 is ON when Ext-cont is L Q100 Inverter sw Q100 is ON when S-MUTE is ON Q200 SW (AM AVR) Q200 is ON when select for TUNER function Q201 SW (AM AVR) Q201 is ON when Q200 is ON Q300 Noise det. sw Q300 is ON when QUAL terminal is H for IC301 Q301 S-mute sw Q301 is ON when Q100 is ON Q460 Reset sw For TV reset signal (invert for reset signal ) Q551~554 Voltage shift Voltage shift for 5V to 8V (for audio selector sw) Q600~606 Preout mute Q600~606 is ON when Q603 is ON (for pre out muting) Q603 Preout mute Q603 is ON when MUTE-PRE is ON (for pre out muting) Q608,610 AV out mute Q608, 610 is ON when Q609 is ON Q609 AV out mute Q609 is ON when MUTE-AVOUT is ON (for AV out muting) Q900 Fan 5V Q900 is ON when Q901 is ON Q901 Fan 5V Q901 is ON when Q902 is ON Q902 Fan 5V Q902 is ON When supplied for SW5V Q903 Fan 5V Q903 is ON when Q900 is ON Q904~906 Noise cancel Noise cancel circuit

● VIDEO UNIT (X35-4280-01)

Ref No. Application / Functions Operation / Condition / Compatibility

IC1 Inverter control IC Control for LCD back light (inverter circuit and driver) IC101 DC/DC converter For VCOM amp (±12V, for LCD -12.0V/+18.5V) IC203 Amp VCOM signal amp IC301 Timing controller Control for LCD IC302 AND V. SYNC delay line buffer IC303 PLL LPF PLL control LPF (VT voltage control) IC304 Schmidt inverter Waveform shaping for c.sync signal IC401 Dimmer sensor Dimmer detect sensor Q1 Dimmer SW On and off is carried out with the control of PWM signal, and dimmer for LCD back light Q2,3 Inverter driver Drive for inverter circuit Q5 AVR 5V output for inverter control IC Q201~203 VCOM driver VCOM signal buffer Q301 VCO PLL oscillator Q501 Touch panel Y1 sw Y0 (X0) SW Y (X)axis input data : ON, X (Y) axis input data : OFF Q502 Touch panel X0/Y1 sw Y1 SW Y axis input data : ON and impressed voltage Q503 Touch panel X1/Y0 sw X1 SW Detect to touch panel or X axis data input : ON and impressed voltage Q601 SW OPEN/CLOSE key illumination blinking sw

8