KENWOOD KDC-MP2028, KDC-MP3029, KDC-MP4029, KDC-MP4029G Service Manual

CD RECEIVER

F.SEL M.RDM

VOL

AUD

SET UP

SCAN RDM REP

C.S.

External Media Control

F.SEL M.RDM

C.S.

VOL

AUD

SET UP

SCAN RDM REP

External Media Control

DISP

VOL

AUD

SET UP

SCAN RDM REP F.SEL

M.RDM

DISP

VOL

AUD

SET UP

SCAN RDM REP F.SEL

External Media Control

PANEL ASSY KDC-MP2028 (A64-3442-02)

PANEL ASSY KDC-MP228 (A64-3443-02)

MOUNTING HARDWARE ASSY (J21-9716-03)

PANEL ASSY KDC-MP3029 (A64-3465-02)

PANEL ASSY KDC-MP4029 (A64-3447-02) KDC-MP4029G (A64-3464-02)

LEVER (D10-4589-04) x2

SCREW (4x16) (N84-4016-48)

DC CORD (E30-6415-15)

* REMOTE CONTROLLER ASSY (RC-517) (A70-2069-05)

BATTERY (Not supplied)

SCREW SET (N99-1757-05)

* ESCUTCHEON (B07-xxxx-xx)

PLASTIC CABINET ASSY (A02-2736-03)

SPARE TDF PANEL

MAIN UNIT NAME TDF PARTS No. TDF NAME KDC-MP2028 Y33-2120-63 TDF-MP52DB KDC-MP228 Y33-2120-64 TDF-MP52D KDC-MP3029 Y33-2130-62 TDF-MP3029 KDC-MP4029 Y33-2130-60 TDF-MP4029 KDC-MP4029G Y33-2130-61 TDF-MP4029G

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

KDC-MP2028 KDC-MP228 KDC-MP3029 KDC-MP4029/G

SERVICE MANUAL

This product uses Lead Free solder.

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

BLOCK DIAGRAM

ANT

CD or MD

MECHA

AUDIO OUT

CHANGER

AUDIO OUT

BACK-UP

SWITCH UNIT (X16-)

ED1

S11

VOL

AM+B

AM AGC

VFD

Q501

SERVO A8V BU5V

.......

L506

FM AGC

800mV

1200mV

RDS

DECODER

IC1

VFD DRIVER KEY MATRIX

ELECTRIC UNIT (X34-)

IC10

MPX OUT

MPX IN

E-VOL

TUNER

IC11

E2PROM

IC7

PAN5V BU5V

REMOTE

with

KEY

ILLUMI

IC8

RST IC

SYSTEM u-COM

IC3

.......

BU5V

IC1

A8V

Q155

DSI

Q351,352

PRE MUTE

IC6

MUTE LOGIC

PAN5

SERVO

Q151

PAN5V

Q72,73

Q51

SURGE DET

Q52

BU DET

Q53

ACC DET

SERVO

VFD REG

IC4

IC15

POWER IC

SW5V AM+B

A8V

BU5V

FM (J/K Type) FM (E Type) AM (J/K Type) AM (E Type) CD/MD RECEIVER

IC3

POWER SUPPLY IC

P-CON P-ANT SW5V AM+B AUDIO+B VCC

BU5V ILLUMI

PRE OUT

: 1800mV :

1372mV

600mV

855mV

3600mV

:CHANGER

3600mV

SP OUT

BACK-UP

ACC

TEL MUTE P-ANT P-CON

CD PLAYER UNIT (X32-5500-00)

CN1

DOUT 12EJE

DATA

AGND

MUTER

MUTEL

MRST

MSTOP

LOE/LIM

DGND DGND

LO/EJ

MOTOR

SGND

LOS CLK

A8V

BU5

S7V

OPEN

22 21

IC9

A8V

19 18

17 16

15 14 13

DAC 3.3V AVR

Q3,5,6

LEVEL SHIFT

Q1,4

LEVEL SHIFT

A3.3V

LEVEL SHIFT

BU5V

9 8

D5V

D5 D5

5 4

3 2 1

IC5

SW 3.3V AVR

IC1

MECHANISM CONTROL MICROPROCESSOR

SW3.3V

S7V

PON

IC6

BU 3.3V AVR

BU3.3V

IC4

IC7

DAC 3.3V AVR

4ch BTL DRIVER

16.00MHz

IC3

MP3/WMA DECODER

BU2.5V

IC8

BUFFER

IC2

RF AMP/SERVO CD SIGNAL PROCESSOR

16.898MHz

FCS

TRK SPD

SLD

DPU1

(OPTICAL PICKUP)

Q9,10

CN2

516

VREF

APC

TR COIL

FO COIL

DM1

SPINDLE

MOTOR

DM2

LOADING & SLED

MOTOR

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

COMPONENTS DESCRIPTION

● ELECTRIC UNIT (X34-3400-xx)

Ref. No. Application / Function Operation / Condition

IC1 SYSTEM µ-COM System control. IC3 POWER SUPPLY DC5Vx2, 7.9Vx1, 8.1Vx1, 10.3V, P.CON, P-ANT output. IC4 POWER IC Audio signal amplifier. IC6 MUTE LOGIC Mute control. IC7 RDS DECODER For other models. IC8 RESET “L” when detection voltage goes below 3.6V. IC10 E-VOL & TUNER E-VOL, Tuner, Stereo decode. IC11 E2PROM Saves and writes tuner adjustment data. IC15 VFD REGULATOR 11.3V output voltage for LED and VFD. Q51 SERGE DET “ON” when the base goes “H”. Q52 BU DET “ON” when the base goes “H”. Q53 ACC DET “ON” when the base goes “H”. Q71 SERVO+B CONTROL SW “ON” when the base goes “H”. Q72,73 SERVO+B AVR Output voltage level : 7.5V. Q74 IC3 CONTROL SW “ON” when the base goes “H” (Output voltage : 10.3V). Q151 PANEL 5V SW “ON” when the base goes “L”. Q155 DSI ILLUMI SW “ON” when the base goes “L”. Q252 IC4 STBY SW “ON” when the base goes “L”. Q330 Q351, 352 MUTE DRIVER “ON” when the base goes “L”. Q351 Lch PRE MUTE SW Pre-output is muted when the base goes “H”. Q352 Rch PRE MUTE SW Pre-output is muted when the base goes “H”. Q501 AM RF AMP Adjusts for AM-RF gain.

● CD PLAYER UNIT (X32-5500-00)

Ref. No. Application / Function Operation / Condition

Focusing, tracking, sled and spindle servo processing.

IC1

IC2

IC3 MP3/WMA DECODER

IC4 4ch BTL DRIVER

IC5 SW 3.3V AVR IC6 BU 3.3V AVR 3.3V power supply for back-up. IC7 BU 2.5V AVR 2.5V power supply for back-up.

MECHANISM CONTROL Automatic adjustment (Focusing, tracking, gain, offset and balance) operations. MICROPROCESSOR Digital signal processing (DSP, PLL, sub-codes, CIRC error correction, audio data

interpolation) operations, and microcomputer function.

Generation of RF signal based on the signals from the APC circuit and pickup, and RF AMP/SERVO CD generation of servo error (Focusing error and tracking error) signals. SIGNAL PROCESSOR Detection of dropout, anti-shock, track crossing and off-track conditions, included

gain control function during CD-RW.

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

eject operation.

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

COMPONENTS DESCRIPTION

Ref. No. Application / Function Operation / Condition

IC8 SELECTOR (SERIAL DATA) Serial audio data switch. IC9 DAC 3.3V AVR 3.3V power supply for IC2. Q1 LEVEL SHIFT 3.3V to 5.0V. Q3~7 LEVEL SHIFT 3.3V to 5.0V. Q8 AUTOMATIC POWER CONTROL LD driver. Q9,10 SWITCH Switch for anticipation sub-beam delay.

● SWITCH UNIT (X16-2930-xx)

Ref. No. Application / Function Operation / Condition

IC1 VFD DRIVER IC3 REMOTE SENSOR Q1 GREEN LED SW “ON” when the base goes “H”. Q2 RED LED SW “ON” when the base goes “H”. Q21 PAN SW5V “ON” when the base goes “H”.

● DAUGHTER UNIT (X89-2690-10)

Ref. No. Application / Function Operation / Condition

Q221,222 2-PREOUT MUTE “ON” when the base goes “H”. Q225 2-PREOUT MUTE “ON” when the base goes “H”.

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

MICROCOMPUTER’S TERMINAL DESCRIPTION

● SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT)

Pin No.

1 DC ERR I DC offset detection input 2 LINE MUTE I Phone detection NAVI MUTE : Over 2.5V, TEL MUTE : Below 1V 3ROTARY CW I Rotary encoder input 4AVSS 5 TUN TYPE1 I E-VOL setting switch Refer to “TUN TYPE” on the TRUTH TABLE 6 TUN TYPE2 I E-VOL setting switch Refer to “TUN TYPE” on the TRUTH TABLE 7AVREF1 8 VFD DATAF I Data input from VFD driver 9 VFD DATAS O Data output to VFD driver 10 VFD CLK O Clock output to VFD driver

11 L VFD RST O Reset output to VFD driver

12 VFD CE O Chip enable output to VFD driver 13 ROTARY CCW I Rotary encoder input 14 L TDF DET I TDF panel detection TDF panel OFF : H, TDF panel ON : L 15 PWIC BEEP O Beep output 16 LX DATA S I Data from slave unit 17 LX DATA M O Data to slave unit 18 LX CLK I/O LX-BUS clock 19 NC -

20 L TUN ADJ I For adjusting IC10

21 TUN SD I Tuner search stop output H : Station exists, L : Station does not exist 22 H LX RST O Hard reset to slave unit H : Reset, L : Normal condition 23 H LX CON O Start-up request to slave unit H : Slave unit ON, L : Slave unit OFF 24 LX REQ M O Communication request to slave unit 25 AUD SDA I/O Volume + tuner I2C data input and output 26 AUD SCL I/O Volume + tuner I2C clock input and output 27 H PWIC STBY O Power IC standby output Power IC ON : H, Power IC OFF : L 28 H VOL MUTE O E-VOL mute output L : Mute OFF, Hi-Z : Mute ON 29 L PWIC MUTE O Power IC mute output Power OFF : L, Standby : L, Tel mute : L 30 TUN FANC OUT O Tuner block (inside the µ-com) check OK : L, NG : H 31 RESET2 O Mute for reset Output L 32 NC 33 VSS1 34 NC 35 L ACC DET I ACC detection ACC exists : L, ACC does not exist : H

Active

(H/L)

Pin Name I/O Application Processing Operation

Display OFF, Key reset, TDF panel OFF : L Display ON, Key scan : H

Adjustment=H, PS1-1,2=L, PS1-3=Hi-Z, PS2-1,2=Hi-Z, TUN DATA, CLK=Hi-Z

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No.

36 L BU DET I Momentary power-down detection

37 NC 38 PS2-2 O Power supply control output 39 PS2-1 O Power supply control output 40 PS1-1 O Power supply control output 41 PS1-2 O Power supply control output 42 PS1-3 O Power supply control output 43,44 NC 45 CD MUTE I CD mute request L : Mute request 46 L CD MSTOP O CD mecha u-com stop 47 CD LOE LIM SW I CD detection (chucking switch) H : Loading is finished, L : Disc does not exist

48 CD LOEJ I/O CD motor control

49 CD MOTOR O CD motor control

50 NC 51 L CD MRST O CD mecha µ-com reset H : Normal condition, L : Reset 52 CD SCL I/O CD mecha I2C clock output 53 CD DISC12 SW I 12cm CD detection 54 CD LOS SW I CD loading detection 55 CD SDA I/O CD mecha I2C data input and output 56 OEM DISP CE I/O External display chip enable External display 57 OEM DISP CLK I/O External display clock External display 58 OEM DISP DATA I/O External display chip data External display 59 DSI O DSI control DSI ON : H, DSI OFF : L, TDF DET=H (DSI blinks) 60 L RESET I 61 NC -

62 L PON FL O VFD power supply ON

63 KEY REQ I Communication request from VFD driver L : Key input 64 NC 65 REMOTE I Remote control input 66 LX REQ S I Communication request from slave unit 67 VSS0 68 VDD1 69 X2 70 X1 -

Active

(H/L)

Pin Name I/O Application Processing Operation

BU exists : L BU does not exist (Momentary power-down) : H

Refer to “POWER IC CONTROL” on the TRUTH TABLE Refer to “POWER IC CONTROL” on the TRUTH TABLE Refer to “POWER IC CONTROL” on the TRUTH TABLE Refer to “POWER IC CONTROL” on the TRUTH TABLE Refer to “POWER IC CONTROL” on the TRUTH TABLE

H : mecha µ-com operates, L : mecha µ-com is stopped

Refer to “CD MECHA CONTROL OPERATION” on the TRUTH TABLE Refer to “CD MECHA CONTROL OPERATION” on the TRUTH TABLE

VFD ON : H, VFD OFF : L TDF DET H (DSI blinks) : L, TDF DET L : H

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No.

71 TEST 72 XT2 73 XT1 74 VDD0 75 AVDD 76~78 TYPE 3~TYPE 1 I Destination switch 79 NC 80 TUN SMETER I Tuner S-meter input

Active

(H/L)

Pin Name I/O Application Processing Operation

● TRUTH T ABLE

• TUN TYPE

General models commercially-designated as pure KENWOOD brand (Initial value) Initial value setting General models commercially-designated as pure KENWOOD brand (CRSC is changed) Multi-Path Band-Path Gain=12dB, Multi-Path Charge Current=0.4µA, De-Emphasis=75µS

TYPE 1 TYPE 2

• POWER SUPPLY IC (IC3) CONTROL

SEL1 (Pin No. 11)

PS1-2 PS1-3 PS2-1 ILLUMI P-CON P-ANT

LLLOFF OFF OFF LLHONOFF OFF HLHONONOFF HHHONONON

SEL2 (Pin No. 12)

PS1-1 PS2-2 AUDIO SW5 AM

LLOFF OFF OFF HLONON OFF HHONON ON

• CD MECHA CONTROL OPERATION

CD LOEJ CD MOTOR CD MECHA OPERATION

LH Load

HH Eject Hi-Z L Stop Hi-Z H Brake

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

MICROCOMPUTER’S TERMINAL DESCRIPTION

● CD MECHANISM µ-COM : IC1 on X32- (CD PLAYER UNIT)

Pin No.

1 VREFL - Reference power supply input terminal for ADC (L). GND 2AVSS - GND terminal for ADC. GND 3AVCC - Power supply terminal for ADC. Back-up 3.3V 4NC5L20RST O Reset control (Decoder). L : Reset, H : Normal condition 6 20ACK I Acknowledge signal input (Decoder). 7 20STBY O Standby control (Decoder). H : Standby, L : Normal condition 8,9 NC 10 20INT I Interrupt signal input (Decoder). 11 FOGUP I Focus gain-up interrupt. H : Focus gain-up, L : Normal condition 12 LZM I 0 bit mute detection (Lch). L : MUTE OFF, H : MUTE ON 13 RZM I 0 bit mute detection (Rch). L : MUTE OFF, H : MUTE ON 14,15 NC 16 L 20CS O Chip select signal output (Decoder). 17 L 20LP O Latch pulse signal output (Decoder). 18 20TXD0 I/O Data output for serial data (Decoder). Input condition is kept except in output condition. 19 20RXD0 I Data input for serial data (Decoder). 20 20SCLK0 O Clock output for serial data (Decoder). 21 DSPTXD1 O Data output for serial data (DSP). 22 DSPRXD1 I Data input for serial data (DSP). 23 DSPSCLK1 O Clock output for serial data (DSP). 24 AM0 - ROM mode selection terminal. H : Normal condition, L : External ROM mode 25 DVCC - Back-up 3.3V. 26 X2 O Resonator terminal. 16MHz 27 DVSS - GND. 28 X1 I Resonator terminal. 16MHz 29 AM1 I “H” condition is fixed. Back-up 3.3V 30 L RESET I Reset detection. L : Reset, H : Normal condition 31~34 NC 35 L DSPSTB O Data strobe signal output (DSP).

36 DSPA0 O

37 L DSPRST O Reset control (DSP). 38 DSPINT I Interrupt signal input (DSP). H : Interrupt 39 NC 40 SEARCH O Search condition output. H : Search, L : Normal condition 41 LOE/LIM SW I 42~49 NC -

Active

(H/L)

Pin Name I/O Application Processing Operation

Command/Parameter identification signal output H : Parameter data output, (DSP). L : Command data output

Loading-end detection/Pick-up inner circumference detection

H : Inner circumference

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No.

50 FLAGIN I C2Err impossibility detection.

51~61 NC 62 DVSS - GND. 63 L NMI I Non-maskable interrupt request. 64 DVCC - Power supply terminal. 65~77 NC 78 NC/BOOT I 79,80 NC 81 POND3.3 O Digital 3.3V power-on control terminal. H : POWER ON 82 L MUTEL O Lch audio mute control. 83 L MUTER O Rch audio mute control. 84 SDA I/O I2C data (Main µ-com). 85 SCL I/O I2C clock (Main µ-com). 86 L MSTOP I Stand-by comeback interrupt. L : Stop, H : Stop is released. 87 NC 88 L DMUTE O Driver mute. L : MUTE ON, H : MUTE OFF 89 DVCC - Power supply terminal. 90 NC 91 DVSS - GND. 92,93 NC - GND. 94 MSEL I Memory capacity switching terminal. H : Capacity size down, L : Capacity size up 95 NC - GND. 96 ASEL I Audio output polarity switch. H : Reverse output, L : Non-reverse output 97 CHSEL I Changer destination terminal. H : Changer, L : Other source 98 SEL0 I µ-com destination terminal 0. 99 SEL1 I µ-com destination terminal 1. 100 VREFH I Reference power supply input terminal for ADC (H). Back-up 3.3V

Active

(H/L)

Pin Name I/O Application Processing Operation

L : Correction is possible. H : Correction is impossible.

Mask : Not connected. Flash : For writing (Active “L”).

L : Write, H : Nomal condition

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

TEST MODE

How to enter the test mode

While simultaneously press PRESET “1” k e y and PRESET “3” key, press “RESET” button.

How to release the test mode

Press “RESET” button. (The release cannot be achieved in the conditions of POWER OFF and ACC OFF.)

Initial conditions of the test mode

• The source is “STANDBY”.

• The displays all lit up.

• The volume is at –10dB (The display shows “30”.)

• LOUD is “OFF”.

• CRSC is “OFF”.

• SYSTEM Q is “NATURAL”.

• BEEP is sounded at all time with the key depressed f or less than 1 second.

Special displays when all indicator lights are lighted

When “PRESET” keys are pressed while all indicators for the STANDBY sources are lighted, the following displays will appear.

PRESET

“1” key (Display) : x x x x x x x x

PRESET

“2” key (Display) : x x x x x x x x

PRESET

“3” key time display (STANDBY source time is not counted.)

PRESET

“4” key time display

•Version display (8 digits : month, date, hour, minute)

• Serial number display (8 digits)

•When pressed for less than 1 second : POWER ON

(Display) : PON x x x x x MAX 60,000 (hours)

* The display is cleared by pressing the key for more

than 2 seconds.

• When pressed for less than 1 second : CD operation

(Display) : PLY x x x x x MAX 60,000 (hours)

* The display is cleared by pressing the key for more

than 2 seconds.

PRESET

“5” key number display

PRESET

“6” key close number display

•When pressed for less than 1 second : CD EJECT

(Display) : EJC x x x x x MAX 60,000 (times) * The display is cleared by pressing the key for more than 2 seconds.

• When pressed for less than 1 second : Panel open/

(Display) : PNL x x x x x MAX 600,000 (times) * The display is cleared by pressing the key for more

than 2 seconds.

“FM” • ROM CORRECTION version display

key (Display)

Effective : ROM _ Rxxx (x : number) Not effective (When not able to read) Not effective (When version is different)

“AM” • IC10 adjustment status (Refer to “ADJUSTMENT” on

key the following page.)

(Display)

Adjustment complete : E2P _ OK _ _ Adjustment not completed : E2P _ ER _ _ Communication error : I2C _ ER _ _

* When other than “E2P _ OK _ _” , Pin No. 30 will

become “H”.

“ ”•Mechanism error detection status

key•Communication error → Error No. 1 → Error No. 2 →

Error No. 3 → Communication error (Error No. 1 is the

most recent error.)

(Display)

Communication OK : I2C _ OK _ _ Communication error : I2C _ NG _ _ Not detected : ERR _ n – – – (n : 1~3) Detected : ERR _ n-✳✳ (✳✳ : error code)

* The display is cleared by pressing the key for more

than 2 seconds.

: ROM _ R – – –

: ROM _ R✳✳✳

KDC-MP2028/MP228/MP3029 KDC-MP4029/MP4029G

SPECIAL MODE

● Security

•

How to enter the forced POWER ON mode

While “– – – –” is being displayed, while simultaneously pressing “Q” key and “4” key, press “RESET” button, With this, it is possible to turn the power on for 30 minutes only.

(KDC-MP2028/MP228/MP4029/MP4029G only)

•How to clear the programmable security code (KDC-MP2028/MP228 only)

1. While “– – – –” is being displayed, press “ ” for 3 seconds or more while pressing the “A UTO” key. This makes the “– – – –” display disappear.

2. Input “KCAR”, using the remote controller. Press “5” key of the remote controller twice (Input for “K”) and press “ Press “2” k e y of the remote controller 3 times (Input for “C”) and press “ ” key. Press “2” key of the remote controller once (Input for “A”) and press “ ” key. Press “7” key of the remote controller twice (Input for “R”) and press “ ” key.

3. The security is cleared and the unit enters STANDBY source mode.

4. If wrong codes are input, “– – – –” will be displayed again.

” key.

● DC offset error detection confirmation mode

Confirmation mode :

While depressing PRESET “3” key and PRESET “6” key simultaneously, press on the “RESET” button. (Display) Detected : DC _ ERR _ _

Not detected : DC _ OK _ _ _

* By pressing “AUTO” key while “DC _ ERR _ _” is being

displayed, detection status is cleared. This will result in the display of “DC _ OK _ _ _”.

Release Method : Press “RESET” button.

● Mechanism memory clear confirmation mode

Confirmation mode :

While depressing “ATT” key and “Q” key simultaneously, press “RESET” button. (Display) : MEM _ CLR _

*2 seconds after the confirmation mode boots up, Mecha-

nism memory clear as a result is displayed. (Display) Clear status display normal completion

: CD _ O _ _ _

Clear status display abnormal completion

: CD _ X _ _ _

•How to register the security code on the “Car Audio Passport” sheet after replacing E2PROM (IC11) (KDC-MP4029/MP4029G only)

1. Enter the test mode. (Refer to “How to enter the test mode”.)

2. In the test mode, press “MENU” key to enter the MENU mode. When “SECURITY” is displayed, press “ than 1 second) to enter the security registration mode.

3. Input the security code, using “FM” / “AM” / “ ” / “ ” keys. “FM” key : number up / “AM” key : number down

” key : cursor to right / “ ” key : cursor to left

“

4. After inputting the code, press “ more which causes “RE-ENTER” to be displayed. This is for “confirming” the code. Use the method in above No. “3” to re-enter the code.

5. Then, press “ ” key for 3 seconds or more, which will display “APPR OVED”. This completes the security code registration.

6. Release the test mode. (Refer to “How to release the test mode” .)

* All clear cannot be used to clear the security code.

” key for 3 seconds or

” key (for less

Release Method : Press “RESET” button.

● FM/AM channel space switching

When in the conditions of ACC ON and POWER OFF, while depressing PRESET “1” key and PRESET “5” key simultaneously, press “SRC” key.

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