Service Manual for KENWOOD KDC-4080R

B51-7565-00(S) 1899

SERVICE MANUAL

CD RECEIVER

KDC-4080R/RV

/RY/RYV

Extension cord

Parts No.

CD mechanism(22P)

W05-0618-00

SRC

LOUD

PWR

OFF

VOL ADJ

NAME.S

PTY

MENU

CLK

SCAN

RDM

REP

D.SCN

M.RDM

KDC-4080R

40W 4

X

CD MD-CHANGER CONTROL

DISC

TI

Knob(RELEASE)

(K24-1948-14)

Knob(SRC)

(K24-1924-14)

Escutcheon

(B07-2181-02)

Front glass

(B10-3128-11)

Panel assy

(A64-1896-12)

The MECHANISM OPERATION DESCRIPTION is the same as model KDC-S3007 and KDC-5050RG.

Please refer to the service manual for model KDC-S3007(B51-7029-00) or KDC-5050RG(B51-7099-00).

Plastic cabinet assy

(A02-1486-13)

Lever x2

(D10-3031-04):KDC-4080RY/RYV

(D10-4197-04):KDC-4080R/RV

Mounting hardware assy

(J21-9491-03)

Antenna adaptor

(T90-0523-05)

DC cord

(E30-4790-05):KDC-4080R/RY

(E30-4791-05):KDC-4080RV/RYV

KDC-4080R/RV/RY/RYV

2

CONTENTS

BLOCK DIAGRAM

BLOCK DIAGRAM .............................................................. 2

COMPONENT DESCRIPTION ........................................... 3

MICROCOMPUTER'S TERMINAL DESCRIPTION ............ 4

ADJUSTMENT .................................................................... 6

PC BOARD ......................................................................... 7

SCHEMATIC DIAGRAM ................................................... 11

EXPLODED VIEW ............................................................ 19

PARTS LIST ...................................................................... 22

SPECIFICATIONS ............................................................ 29

FM+B

AM+B

RDS

DECODER

AMP

NOISE

TEL-MUTE

ACC DET.

BU DET.

WITH

LCD DRIVER

KEY MATRIX

LCD

REMOTE

A8V

SERVO

SW14V

ILLUM

SW5V

BU5V

P-CON

MUTE DRIVER

MUTE

POWER IC

u-COM

and

PRE OUT

SP-OUT

TEL-MUTE

ACC

P-CON

BACK UP

E-VOL

PAN 5V SW

203mV

170mV

1200mV

MPX

CONTROL

Q202,203

Q200,201

IC2

Q155,156

IC5,

IC4

IC6

Q13

Q12

Q17-20

Q1,2

Q14

Q5,6

Q7

Q3,4

Q8-11

Q207

IC1

IC2

TUN5V

BUFF

PROTECTION

THERMAL

DSI

RST

RST SW

Q204

,206

IC1

IC3,Q50

Q205

Q151-154

S-METER

CH

MO SW

SERVO

LO/EJ

STOP

RST

CS

MUTE

SRQ

DATA S

DATA M

CLK

SW3

SW2

SW1

A8V

RST

DATA C

REQ H

CH-CON

DATA H

REQ C

CLK

CD

AM

FM

MUTE

D

ATA

S

CLK

CE

D

ATA

L

RES

RDCK

RDD

A

QU

A

L

NOISE

SD

A

SCL

A8V

SW5V

BU5V

UP

AUDIO OUT

BU5V

MUTE

PAN 5V

SD

A

SCL

VDD

PHONE

ACC DET.

BU DET.

REMO

AFC

SD

DSI

BU5V

SW5V

BU5V

AM+B

FM+B

SD

S-METER

PAN 5V

BACK

P

ANEL

PANEL

CD

CH

TUNER

(X13)

,208

QUAL

Q51

SVR SW

SVR

Q150

VDD 5V

IF1/IF2/PLL+B

LEVEL

ILL. SW

3529mV

AM

FM

792mV

1276mV

CD-CH

CD

3529mV

KDC-4080R/RV/RY/RYV

3

qELECTRIC UNIT(X25-84X2-7X)

Ref.No.

Component Name

Application/Function

Operation/Condition/Compatibility

IC1

UPD780058GC107

System MI-COM.

IC2

TDA7400D

E-VOL. & N.C. MPX

IC3

PST9130NR

Reset IC

"Lo": Detection voltage below 3.0V

IC4

TDA7384A

Power IC

IC5

HD74HC27FP

Mute logic

3 input NOR gate x3

IC6

TDA7479D

RDS decoder

Q1

2SB1565F(E,F)

BU 5V AVR

Inverted darlington connection

Q2

2SC1740S

ON during BU applied

Q3

DTA124EKorUN2112

SW14V

Audio 8V AVR and Servo AVR ON/OFF control

Q4

DTC144EKorUN2213

Q3 is turned ON when Q4's base goes "Hi".

Q5

2SB1184

Audio 8V AVR

Q5 is turned ON when Q6's base goes "Hi".

Q6

2SC1740S

Inverted darlington connection

Q7

2SD2396F40

Servo AVR

ON when the base goes "Hi".

Q8

DTC144EKorUN2213

Illumination AVR

Q10 is turned ON when Q8's base goes "Hi".

Q9

DTA124EKorUN2112

Q10

2SB1184

Q11

2SC1740S

Q12

2SC1740S

BU detection(Momentary power down detection)

ON when the base goes "Hi" during BU applied.

Q13

2SC1740S

ACC detection

ON when the base goes "Hi" during ACC applied.

Q14

2SA1036K

SW 5V

ON when the base goes "Lo".

Q17

2SB1277(Q,R)

P-CON SW

Q17 is turned ON when Q20's base goes "Hi".

Q20

DTC114YKorUN2214

ON while power is on or CD loading/eject.

Q18

2SA1037K

P-CON protection

Protect Q17 by turning ON when P-CON output is grounded.

Q19

DTA124EKorUN2112

Prevents Q18 tuning ON during start-up after power ON.

Q50

DTC144EKorUN2213

RESET SW

System RESET is activated when the panel reset SW is pressed.

Q51

2SC2412Kor2SD601A

DSI SW

ON when the base goes "Hi".

Q150

DTC114YKorUN2214

SVR SW

POWER IC RESET is activated when the base goes "Hi".

Q151

DTC143TKorUN2216

Audio mute SW

Audio pre-outs are muted when the base goes "Hi".

Q152

DTC143TKorUN2216

Q153

DTC143TKorUN2216

Q154

DTC143TKorUN2216

Q155

DTA124EKorUN2112

Mute driver for Audio mute SW

ON when the base goes "Lo".

Q156

DTC144EKorUN2213

E-VOL. mute SW

E-VOL. is muted when the base goes "Hi".

Q200

2SB1277(Q,R)

FM+B SW

Q200 is turned ON when Q201's base goes "Hi".

Q201

DTC124EKorUN2212

ON during FM reception

Q202

2SB1277(Q,R)

AM+B SW

Q202 is turned ON when Q203's base goes "Hi".

Q203

DTC124EKorUN2212

ON during AM reception

Q204

2SC1740S

Tuner audio out buffer

Q205

DTC114TKorUN2215

AFC time constant SW

OFF during FM seek,ON during FM reception

Q206

DTA124EKorUN2112

Q205 is turned OFF when Q206's emitter goes "Lo".

Q207

2SA1037K

Panel detection SW

ON when the base goes "Lo" during the panel closed.

Q208

2SC1740S

Noise buffer

COMPONENT DESCRIPTION

qSWITCH UNIT(X13-96X2-7X)

Ref.No.

Component Name

Application/Function

Operation/Condition/Compatibility

IC1

LC75883E

LCD driver with key-matrix

IC2

RS-171

Remote control light sensor

Q1

DTA114EKorUN2111

key-matrix permission SW

Ready on key-matrix

Q2

2SD2114K

key illmination SW (Green)

ON when the base goes "Hi".

Q3

2SD2114K

key illmination SW (Red)

ON when the base goes "Hi".

qCD PLAYER UNIT(X32-4600/4700-00)

Ref.No.

Component Name

Application/Function

Operation/Condition/Compatibility

IC1

AN8806SB

RF amplifier

Generation of RF signal based on the signals from the APC

circuit and pickup, and generation of servo error(focusing

error and tracking error) signals. Detection of dropout, anti-

shock, track crossing and off-track conditions.

IC2

MN662770KA7

CD signal processor bult-in MI-COM.

Focusing,tracking,sled and spindle servo processing. Automatic

adjustment(focusing, tracking, gain, offset and balance) operations.

Digital signal processing(DSP, PLL, sub-codes, CIRC error

correction, audio data interpolaration) operations.

IC4

BA5917AFP

BTL driver

Focusing coil, tracking coil, spindle motor and sled motor driver

IC5

TA78L05F

5V AVR

IC6

NJM4565MD

Low pass filter

Q1

2SA1362(Y)

APC

LD power control

Q2

DTC124EUA

POWER SW

Power on during the source selected CD

Q3

2SA1362(Y)

A.8V SW

A8V line ON/OFF control

Q4

2SA1362(Y)

D.5V SW

D5V line ON/OFF control

Q5

DTC124EUA

MOTOR ON SW

Power on during CD roading or eject action

Q6

2SA1576A

TE LEVEL SW

OFF during CDR play

KDC-4080R/RV/RY/RYV

4

MICROCOMPUTER'S TERMINAL DESCRIPTION

qTerminal Description

Function

I/O

Description

Processing Operation

1

AV CONT

O

A/D converter reference voltage control output

"Hi": ON / "Lo": OFF

2

IC2 TYPE0

I

IC2 setting terminal

"Lo": Initial value

3

IC2 TYPE1

I

IC2 setting terminal

"Lo": Initial value

4

AVSS

-

Ground connection terminal

connected to GND

5

M MUTEL

I

Muting request from the MICOM. of CD mecha.

"Lo": Mute request

6

N.C

O

Not used

7

AVREF1

I

D/A converter reference voltage input

8

ILLUMI

O

Illumination AVR ON/OFF control output

"Hi": AVR ON

9

L RES

O

Reset output to the LCD driver IC

"Lo": Reset

10

PANEL

I

Panel open/close detection input

"Lo": Panel closed

11

L DATAL

I

Data input from the LCD driver IC

12

L DATAS

O

Data output to the LCD driver IC

13

L CLK

O

Clock output to the LCD driver IC

14

N.C

O

Not used

15

N.C

O

Not used

16

CH-DATAC

I

Data input from changers

17

CH-DATAH

O

Data output to changers

18

CH-CLK

I/O

Clock input/output with changers

19

L CE

O

CE output to the LCD driver IC

"Hi": Active

20

N.C

O

Not used

21

M RST

O

Reset output to the MICOM. of CD mecha.

"Lo": Reset

22

M STOP

O

Stop request to the MICOM. of CD mecha.

"Lo": Stop

23

MOSW

O

CD mechanism loading motor control output

"Hi": Loading & Eject / "Lo": other

24

PLL SCL

O

Clock output to the tuner pack

25

AM+B

O

AM+B control

"Hi": during AM reception

26

FM+B

O

FM+B control

"Hi": during FM reception

27

M-SCL

I/O

Clock input/output with the MICOM. of CD mecha.

28

DSI

O

DSI output

"Hi": LED ON

29

LO/EJ

I/O

CD mecha.Loading/Eject switching output

"Lo": Loading / "Hi": Eject

30

SW3

I

Down & limit switch detection input

"Hi": Chucking / "Lo": Pickup most inner position

31

R DATA

I

Data input from RDS decoder

32

R QUAL

I

Quality input from RDS decoder

33

VSS1

-

Ground connection terminal

connected to GND

34

SD

I

SD input from the tuner pack

"Hi": Station detected

35

IC2 SCL

O

Clock output to the E-VOL. IC

36

M-SDA

I/O

Data input/output with the MICOM. of CD mecha.

37

PLL SDA

I/O

Data input/output with the tuner pack

38

IC2 SDA

I/O

Data input/output with the E-VOL. IC

39

MUTE

O

Mute control output

"Hi": Mute ON / "Lo": Mute OFF

40

N.C

O

Not used

41

AFC

O

AFC control output

"Lo": during FM seek

42

CH-REQH

O

Request output to changers

"Lo": Request

43

CH-CON

O

Changer control

"Lo": Standby / "Hi": ON

44

N.C

O

Not used

45

P MUTE

O

Power IC mute control

"Lo": Mute

46

SVR

O

Power lC reset terminal

When the momentary power down, after ACC

OFF/ON is detected and after POWER ON/

OFF, the output goes "Hi" temporarily.

47

STBY

O

Power IC standby control output

"Hi": POWER ON mode

48

P CON

O

Power control

"Hi": POWER ON mode except ALL OFF mode

49

P ANT

O

Antenna control

"Hi": during FM/AM reception

50

BEEP

O

BEEP sound output

51

ACC DET

I

ACC detection input

"Hi": ACC OFF / "Lo": ACC ON

52

BU DET

I

Momentary power down detection input

"Hi": When momentary power down detected

or BU OFF / "Lo": BU ON

53

N.C

O

Not used

5

6

KDC-4080R/RV/RY/RYV

MICROCOMPUTER'S TERMINAL DESCRIPTION

KDC-4080R/RV/RY/RYV

NOTE

1. For arm ass'ies Nos.6 and 7 used in the CD mechanism

ass'y, use the combination of the following parts.

Ref.No.

Parts No.

6

D10-4306-04

D10-3083-44

7

D10-4305-04

D10-3084-44

2. The parts numbers of arm ass'ies Nos.6 and 7 shown in the

exploded view of CD mechanism ass'y are D40-4306-04

and D40-4305-04 respectively.

TEST MODE

1. To enter test mode

While holding the "FM" key and preset "6" key, reset the unit.

All indication segments are ON at the beginning of test mode.

2. To release test mode

Simply reset the unit.

(NOTE) The test mode is not canceled by ACC OFF, power

OFF, momentary power down or the panel detaching.

3. CD receiver test mode specification

Pressing the "Track up" key jumps between tracks in the

following order.

No.9 ¡ No.15 ¡ No.10 ¡ No.11 ¡ No.12 ¡ No.13 ¡ No.14

¡ No.9 (Same as the beginning)

Pressing the "Track down" key jumps to the previous track to

the being played.

Pressing the preset "1" key jumps to No.28 track.

4. Audio adjustment

The volume is set to -10dB (which is shown as 30).

Loudness is OFF.

The BASS / TREBLE and BALANCE / FADER controls can

be set to the full boost / full cut and full front / full rear

respectively by pressing the "Track UP" / "Track DOWN" keys.

Sound coordination doesn't appear for the feed.

ADJUSTMENT

Function

I/O

Description

Processing Operation

54

N.C

O

Not used

55

N.C

O

Not used

56

SW5

O

SW 5V control

"Lo": POWER ON mode

57

P ON

O

Microprocessor peripheral power supply control terminal

"Hi": ACC ON or during CD Loading/Eject

58

TYPE2

I

Destination type input terminal 2

59

N.C

O

Not used

60

RESET

I

Reset input terminal

"Lo": System reset

61

REMO

I

Data input from the remote control light sensor

62

R CLK

I

Clock input from RDS decoder

63

CH-REQC

I

Request input from changers

"Hi": Request

64

SW1

I

Loading detection

"Lo": CD chucking

65

KEY-REQ

I

Key request terminal

"Lo": Request

66

SW2

I

12cm disc detection terminal

"Lo": 12cm disc

67

VSS0

-

Ground connection terminal

connected to GND

68

VDD1

-

VDD connection terminal

69

X2

-

Main clock resonator connection terminal

70

X1

I

Main clock resonator connection terminal

71

IC(TEST)

-

Not used

connected to GND

72

XT2

-

Sub clock resonator connection terminal

N.C.

73

N.C

I

Sub clock resonator connection terminal

connected to BU5V lines

74

VDD0

-

VDD connection terminal

75

AVREF0

I

A/D converter reference voltage input

76

SMETER

I

S-meter input from the tuner pack

77

PHONE

I

PHONE detection input

1V or less: TEL MUTE,2.5V or greater: NAVI MUTE

78

NOISE

I

Noise detection input

79

TYPE0

I

Destination type input terminal 0

80

TYPE1

I

Destination type input terminal 1

KENWOOD KDC-4080R Service Manual

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