Service Manual for KENWOOD KDC-MPV619

B51-7893-00 (N) 3415

Antenna adaptor

(T90-0523/0534-05)

: KDC-MV6521

Screw set

(N99-1656-05)

Screw set

(N99-1719-05)

: KDC-MPV619

: KDC-MPV7019

: KDC-MPV7020

Lever

(D10-4589-04)x2

Mounting

hardware assy

(J21-9716-03)

Escutcheon

(B07-3055-02)

Plastic

cabinet assy

(A02-1486-13)

Remote

controller assy

(A70-2025-05)

: KDC-MPV619

: KDC-MPV7019

Remote

controller assy

(A70-2026-05)

: KDC-MPV7020

DC cord

(E30-4940-05)

: KDC-MPV619

: KDC-MPV7019

: KDC-MPV7020

DC cord

(E30-4958-05)

: KDC-MV6521

Front glass

(B10-4168-01)

Panel assy

(A64-2590-02)

KDC-MPV619

Front glass

(B10-4174-01)

Panel assy

(A64-2596-02)

KDC-MPV7020

Front glass

(B10-4169-01)

Panel assy

(A64-2591-02)

KDC-MPV7019

Front glass

(B10-4178-01)

Panel assy

(A64-2600-02)

KDC-MV6521

CD RECEIVER

KDC-MPV619/MPV7019

KDC-MPV7020/MV6521

SERVICE MANUAL

· This service manual does not include information on the CD mechanism assembly (exploded view, parts list,

schematic diagram or mechanism operation description).

For such information, please refer to the CD mechanism assembly service manual (X92-4460-0x : B51-7891-00).

KDC-MPV619/MPV7019/MPV7020/MV6521

2

BLOCK

DIAGRAM

CH

CD MECHA

F/E

FM+B

PLL+B

AM+B

BUFF

E-VOL

SYSTEM

MI-COM

DECODER

RDS

MP3

NORMAL

SW

ANALOG

SW

AUX/CH

SW

AUX

WIRED

OEM DISP

RST IC

DET

FLIP

LCD (POSI)

MATRIX

KEY

G/R SW

RST SW

REMO ON

BACKLIGHT

LCD

V-ILL

DRIVER

LCD

REMO

D/A

CONVERTER

GUIDE

ILL

SW

OPEN

OUT

REMO/

BU5V

SW5V

SERVO

+B

PANEL

2WAY MUTE

ACC DET

DIMMER

TEL-MUTE

ACC

DIMMER

POWER IC

SP OUT

MUTE

PRE OUT (FRONT)

PRE OUT (REAR)

MUTE

PRE OUT (NF/REAR)

MUTE

DRIVER

OP AMP

SWITCHED

PROTECTION

THERMAL

NOISE

BUFFER

5V

BU DET

SW14V

A8V

CD

MACHA+B

ILLUMI

+B

(for MP3)

EJECT ILL/DSI

(SW AND LED)

EJECT KEY

X89-252

X89-251

BACK UP

ANT-CON

P-CON

Q45,47

Q46,48

IC7

(E) TYPE

IC1

& N.C. MPX

IC2

Q52

(E) TYPE

Q9,10

IC9

IC10

(M) TYPE

(K,E)

TYPE

IC8

Q54

S1

AVR

LCD

ED1

Q50-64

Q3,4

IC2

Q6

IC3

IC1

Q5

Q16,17

Q18

Q14,15

IC11,Q51

Q19-22

Q33

Q34

Q26

Q13

Q11,12

Q55

Q28,31

Q27,29,30,32

(E) TYPE

P-CON

ANT-CON

(K,M) TYPE

(E) TYPE

IC6

Q43

Q7,8

IC4

Q5,6

Q1-4

IC3,

DATA C

CH-CON

DATA H

REQ H

RST

CLK

REQ C

CD MECHA+B

SERVO+B

PLL DATA

PLL CLK

M STOP

M RST

SW4

MUTE R

MUTE L

LO/EJ

MOSW

SW2

SW3

SW1

S-METER

IFC OUT

SW5V

3

P

A

NEL

DET

GUIDE

ILL

MP IN

AFS

LEVEL

RDDA

FM

AM

A 8V

(for MP3)

BU5V

A8V

3

2

3

10

7

3

SW5V

10

SDA

SCL

AUDIO OUT

7

A8V

BACK UP

3

2

O-CLK

O-DATA

O-CE

REMO

RESET

BU5V

MUTE

DRIVER

PANEL5V

RGB

CONTR

OL

3

2

5

CD

AM+B

FM+B

S-METER

RDCK

RQUAL

BU5V

2

5

BU5V

FLIP

DET

L

D

ATA

S

L

CE

L

CLK

L

D

ATA

L

L-INH

V

-ILL

D

A

T

A

V

-ILL

CLK

EJECT

ILLUMI/DSI

ILL

ON

CD

MECHA+B

SW5V

(E) TYPE

(K,M) TYPE

CD (MP3,NORMAL)

3600mV

CHANGER

3600mV

1800mV

600mV

FM

AM

1372mV

855mV

3600mV

2

BU5V

8

2

QUAL

S MUTE

REAR L/R

FRONT L/R

AFS

NOISE

N/F SW

PRE MUTE

N/F MUTE

P MUTE

MUTE

BEEP

BU5V

MUTE

DRIVER

P-ON

PANEL5V

SW5V

AUX SW

CH-AUX

MODE

PRE OUT OUTPUT VOLTAGE

DIMMER

PHONE

ACC DET

BU DET

251mV (E)

470mV (K,M)

230mV

1200mV

(MP3,NORMAL)

1200mV

KDC-MPV619/MPV7019/MPV7020/MV6521

3

q SWITCH UNIT (X16-1620-10/X16-1652-70)

COMPONENTS DESCRIPTION

Ref.No.

Component Name

Application/Function

Operation/Condition/Compatibility

IC1

LC75808W

LCD driver with key matrix

IC2

RS-171

Remote control sensor IC

IC3

M62333FP

D/A converter

The brightness control of red, green and blue colour

Q1

DTA114EUA or KRA302 Key permission SW

For the key scanning start and the key detection SW

Q3

2SD2114K

Key illumination red SW

When a base goes Hi, RED LEDs are turned on.

Q4

2SD2114K

Key illumination green SW

When a base goes Hi, GREEN LEDs are turned on.

Q5

2SC4081

VLCD AVR

For LCD driver IC

Q6

DTA114EUA or KRA302 5V SW

While a base goes Lo, PAN 5V is supplied to the remote

control sensor IC and D/A converter IC.

Q50

2SC4081

V-I converter

Current driver for blue LED

Q51

2SC4081

V-I converter

Current driver for green LED

Q52

2SC4081

V-I converter

Current driver for red LED

Q53

2SC4081

V-I converter

Current driver for blue LED

Q54

2SC4081

V-I converter

Current driver for green LED

Q55

2SC4081

V-I converter

Current driver for red LED

Q56

2SC4081

V-I converter

Current driver for blue LED

Q57

2SC4081

V-I converter

Current driver for green LED

Q58

2SC4081

V-I converter

Current driver for red LED

Q59

2SC4081

V-I converter

Current driver for blue LED

Q60

2SC4081

V-I converter

Current driver for green LED

Q61

2SC4081

V-I converter

Current driver for red LED

Q62

2SC4081

Buffer

Control voltage buffer for red LEDs brightness

Q63

2SC4081

Buffer

Control voltage buffer for green LEDs brightness

Q64

2SC4081

Buffer

Control voltage buffer for blue LEDs brightness

UPD703030GFA03

IC1

or UPD703033GFA05

System MI-COM.

or UPD703033GFA13

IC2

TDA7407D

E.VOL & N.C.MPX IC

IC3

HD74HC02FP

Mute logic

2-input NOR x 4

or TC74HC02AF

IC4

TA8273H

Power IC

IC6

NJM2123V-TE2

Switched Op. Amp.

IC7

SAA6581T

RDS decoder

IC8

S-80837ANNP

Reset IC

When BU 5V voltage is less than 3.7V, IC outputs Lo.

IC9

TC4066BF(N)

AUX input SW

When 5 pin, 12 pin and 13 pin terminals go Hi, AUX's inputs

are selected.

IC10

TC4066BF(N)

Changer input SW

When 5 pin, 12 pin and 13 pin terminals go Hi, Changer's

inputs are selected.

IC11

SI-8050JD

CD+5V AVR

DC/DC converter

Q1

DTC143TUA

Audio mute SW

When a base goes Hi, Front R Ch. pre-out is muted.

Q2

DTC143TUA

Audio mute SW

When a base goes Hi, Front L Ch. pre-out is muted.

Q3

DTC143TUA

Audio mute SW

When a base goes Hi, Rear R Ch. pre-out is muted.

Q4

DTC143TUA

Audio mute SW

When a base goes Hi, Rear L Ch. pre-out is muted.

Q5

2SD2114K

Audio mute SW

When a base goes Hi, NON-F R Ch. pre-out is muted.

Q6

2SD2114K

Audio mute SW

When a base goes Hi, NON-F L Ch. pre-out is muted.

q ELECTRIC UNIT (X25-9190-XX/X25-9202-70)

Ref.No.

Component Name

Application/Function

Operation/Condition/Compatibility

KDC-MPV619/MPV7019/MPV7020/MV6521

4

COMPONENTS DESCRIPTION

Ref.No.

Component Name

Application/Function

Operation/Condition/Compatibility

Q7

DTA124EUA or KRA303 Mute driver for pre-out mute SW

When a base goes Lo, Q7 is turned on for driving NON-F mute SW.

Q8

DTA124EUA or KRA303 Mute driver for pre-out mute SW

When a base goes Lo, Q8 is turned on for driving Front and

Rear mute SW.

Q9

DTC144EUA or UN5213

AUX/Changer selection SW

AUX selected : (Q9,Q10)=(ON,ON)

Q10

DTA124EUA or KRA303

Changer selected : (Q9,Q10)=(OFF,OFF)

Q11

2SC4081 or 2SD1819A

BU 5V AVR

While BACKUP is applied, BU 5V AVR outputs +5V.

Q12

2SA2057

Q11 and Q12 are inverted Darlington connection.

Q13

2SA1576A or 2SB1218A SW 5V

While a base goes Lo, SW 5V is supplied to the

microprocessor peripheral circuits.

Q14

2SC4081 or 2SD1819A

When Q14's base goes Hi, Q15 is turned on, and A.+8V AVR

A.+8V AVR

outputs +8.3V.

Q15

2SA2057

Q14 and Q15 are inverted Darlington connection.

Q16

DTC124EUA or UN5212

A.+8V AVR and SERVO +B AVR ON/OFF control

Q17

DTA124EUA or KRA303

SW14V

While Q16's base goes Hi, Q17 is turned on, and A.+8V AVR

and SERVO +B AVR are working.

Q18

2SD2375

SERVO +B AVR

When Q18's base goes Hi, SERVO +B AVR outputs +7.6V.

Q19

DTC124EUA or UN5212

ILL +B AVR ON/OFF control

Q20

DTA124EUA or KRA303

ILL +B AVR SW

While Q19's base goes Hi, Q20 is turned on, and ILL +B AVR

is working.

Q21

2SB1184

While Q22's base goes Hi, Q21 is turned on, and AVR

Q22

2SC4081 or 2SD1819A

ILL +B AVR

outputs +10.7V.

Q21 and Q22 are inverted Darlington connection.

Q26

DTC144EUA or UN5213 Small lamp detection SW

When vehicle small lamps turn on, Q26's base goes Hi, and

Q26 is turned on .

Q27

DTC114YUA or UN5214

P-CON SW

When Q27's base goes Hi, Q32 is turned on .

Q32

2SB1277(Q,R) or 2SB1434

Works during POWER ON mode.

Q29

DTA124EUA or KRA303 P-CON. protection inhibit SW

Prevents Q30 tuning ON during start-up after power ON.

Q30

2SA1576A or 2SB1218A P-CON. protection SW

Protect Q32 by turning ON when P-CON output is grounded.

Q28

DTC114YUA or UN5214

P-ANT SW

When Q28's base goes Hi, Q31 is turned on.

Q31

2SB1277(Q,R) or 2SB1434

Works during FM/AM reception mode or RDS reception mode.

While BACKUP is applied, a base goes Hi, and Q33 is turned on.

Q33

2SC4081 or 2SD1819A BU detection SW

When momentary power down has detected, a base goes Lo,

and Q33 is turned off.

Q34

2SC4081 or 2SD1819A ACC detection SW

While ACC is applied, a base goes Hi, and Q34 is turned on.

Q42

DTC124EUA or UN5212 E. VOL. mute SW

When BU detection SW or MI-COM.'s mute is working, a base

goes Hi, and Q42 is turned on.

Q43

DTC143TUA

Noise buffer

Q45

DTC124EUA or UN5212

When Q45's base goes Hi, Q47 is turned on, and A.+8V is

Q47

2SB1277(Q,R) or 2SB1434

FM+B SW

supplied to the F/E. Works during FM reception mode or RDS

reception mode.

Q46

DTC124EUA or UN5212

AM+B SW

When Q46's base goes Hi, Q48 is turned on, and A.+8V is

Q48

2SB1277(Q,R) or 2SB1434

supplied to the F/E. Works during AM reception mode.

Q51

2SC4081 or 2SD1819A CD+5V AVR SW

When a base goes Hi, CD+5V AVR is working.

Q52

DTC143TUA

Composite signal buffer

Q53

DTA114YUA or UN5114 EJECT illumination/DSI SW

When a base goes Lo, Q53 is turned on.

Q54

DTA114YUA or UN5114 Guide illumination SW

When a base goes Lo, Q54 is turned on.

Q55

2SA1576A or 2SB1218A Panel 5V SW

When a base goes Lo, Q55 is turned on.

KDC-MPV619/MPV7019/MPV7020/MV6521

5

MICROCOMPUTER'S TERMINAL DESCRIPTION

q IC1 (ELECTRIC UNIT : X25-9190-XX/X25-9202-70)

Pin No.

Pin name

I/O

Description

Processing Operation

1

L-DATAS

O

Data line to LCD driver

2

L-CLK

O

Clock output to LCD driver

3

PLL-DATA

I/O

Data input/output terminal with F/E

4

PLL-CLK

I/O

Clock output to F/E

5

AM+B

I/O

AM+B control

Hi: During AM reception

6

FM+B

I/O

FM+B control

Hi: During FM reception,

Hi: During FM reception if with RDS, RDBS

7

CH-CON

O

Changer control output

Lo: Standby mode, Hi: Operation mode

8

CH-RST

O

Reset output to changers

: Reset

9

EVDD

-

Positive power supply connection terminal

Connected to BU 5V lines.

10

EVSS

-

Ground connection terminal

Connected to GND lines.

11

AFS

O

Noise detection time constant switching terminal Hi: During FM reception, Lo: During FM seek or AF search

12

BEEP

O

BEEP sound output

13

REMO

I

Data input from the remote control light

sensor or wired remote control

14

AUX SW

I/O

CH/AUX inputs selector terminal

Hi: AUX inputs, Lo: CH inputs

Lo: No AUX inputs model

Hi: Rear/N-F pre-outs are selected to Front output.

15

N/F SW

O

N-F selector terminal

Lo: Rear/N-F pre-outs are selected to Rear output.

Lo: No Rear/N-F pre-outs model

16

IC2-SDA

I/O

Data line with IC2,CD mechanism MI-COM.

17

IC2-SCL

I/O

Clock line with IC2,CD mechanism MI-COM.

18

PRE-MUTE

I/O

Pre-out mute control terminal

Lo: When momentary power down detected,

when M-MUTE input is Lo.

Lo: When momentary power down detected, N-F pre-

19

N/F-MUTE

O

N-F pre-out mute control terminal

outputs selecting or OFF, when M-MUTE inputs is Lo.

Lo: No Rear/N-F pre-outputs model

20

DIMMER-CON

O

Dimmer control output

Not used (N.C.)

21

TEST

-

Test terminal

Not used (Connected to GND lines)

22

SVR

O

Power IC SVR control output

Not used (N.C.)

23

P-MUTE

O

Power IC mute output

Lo: ALL OFF model, POWER OFF mode, TEL MUTE on

24

P-STBY

O

Power IC STBY control output

Hi: Power IC on, ALL OFF mode, Lo: Power IC off

25

MUTE

O

Mute control output

Lo: Mute off, Open: Mute on

26

SW5V

I/O

SW5V control terminal

Lo: SW5V on, Hi-Z: SW5V off

27

BU DET

I

Momentary power down detection input

Hi: When momentary power down detected or BU OFF

Lo: BU ON

28

ACC DET

I

ACC detection terminal

Hi: ACC OFF, Lo: ACC ON

29

N.C

O

Not used (N.C.)

30

DIMMER

I

Small lights detection input

Lo: During vehicle small lamps turn on.

31

N.C

O

Not used (N.C.)

32

P-CON

I/O

Power control output

Hi-Z: POWER OFF mode, ALL OFF mode,

Hi: POWER ON mode

33

ANT-CON

O

Antenna control output

Hi: During TUNER mode, TI reception mode, last FM mode

34

RESET

I

Reset input terminal

Lo: System reset

35

XT1

I

Sub clock resonator connection terminal

Clock count during POWER OFF mode

36

XT2

-

Sub clock resonator connection terminal

37

REGC

-

Capacitor connection terminal for regulator

inside microprocessor

38

X2

-

Main clock resonator connection terminal

Oscillation: POWER ON mode, Oscillation stop:

POWER OFF mode or momentary power down detected

39

X1

I

Main clock resonator connection terminal

40

VSS

-

Ground connection terminal

Connected to GND lines.

41

VDD

-

Positive power supply connection terminal

Connected to BU 5V lines.

42

CLKOUT

O

Internal system clock output

Not used (N.C.)

43

CD MECH +B

I/O

MP3 CD mechanism power supply control output Lo: Power supply on, Hi-Z: Power supply off

44

P-ON

I/O

SW14V control terminal

Lo: POWER OFF mode, Hi: POWER ON mode

45

O-DATA

I/O

Data line with the external display device

Lo: The model without the external display device

46

O-CLK

I/O

Clock line with the external display device

Lo: The model without the external display device

47

O-CE

I/O

CE line with the external display device

Lo: The model without the external display device

KENWOOD KDC-MPV619 Service Manual

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