Kenwood KDC-202-MR, KDC-2022, KDC-2022-V, KDC-4023 Service manual

2002-11 PRINTED IN JAPAN

B53-0003-00 (N)1724

COMPACT

DIGITAL AUDIO

RDMLOUD REPSCAN

OFF

KDC-XXXX

CRSC

AMEAUTOADJCLK

AUD

50W

Panel assy (A64-2864-02): KDC-2022V (A64-2865-02): KDC-2022

Escutcheon (B07-3022-02): KDC-4023

Escutcheon (B07-3022-02): KDC-202MR

(B07-3060-02): KDC-2022/V

(A64-2871-02): KDC-4023

CD MD-Changer Control

M. RDM

COMPACT

RDMLOUD REPSCAN

OFF

KDC-202MR

CRSC

AMEAUTOADJCLK

AUD

45W

Panel assy

(A64-2866-02): KDC-202MR

DC cord

(E30-4784-05)

CD MD-Changer Control

DIGITAL AUDIO

Depends on model. Refer to the parts list

Lever

(D10-4589-04)

Mounting hardware assy

(J21-9716-03)

Plastic cabinet assy

(A02-1486-13)

Remote controller assy

(A70-2025-05)

Screw set

(N99-1719-05)

Screw set

(N99-1610-15)

CD RECEIVER

KDC-2022/V KDC-202MR KDC-4023

SERVICE MANUAL

CD mechanism operation description is not in this sarvice manual. Please, refer to sarvice manual X92-4030-0x (B51-7867-00).

CD mechanism extension cord : W05-0618-00

KDC-2022/V/202MR/4023

BLOCK DIAGRAM

1200mV

CD : 3600mV CH : 3600mVAM(E) : 855mV

FM(E) : 1372mV

FM(J,K) : 1800mV AM(J,K) : 600mV

CHANGER

KEY MATRIX

WITH

LCD DRIVER

LCD

REMOCON

MI-COM

ANT

AM AGC

FM AGC

DECODER

RDS

RESET IC

EEP-ROM

TUNER,MPX & E-VOL.

SUPPLY IC

SW5V

SERVO

P-ANT

P-CON

POWER

MUTE LOGIC

DET

ACC

BU DET

MUTE

PRE

POWER IC

ACC

BACK

OUT

PRE

IC1

DATA H

MUTE

DATA C

REQ H

CH-CON

AUDIO OUT

CLK

REQ C

RST

BACK UP

BU5V

IC2

SW5V

LO/S

RST

LOE/LIM

LO/EJ

STOP

MUTE

8EJE

SDA

SCLK

AUDIO OUT

12EJE

Q501

Q502

AM+B

FM+B

AM AGC OUT

IC6

CH CD

SERVO BU5V

A8V

TUNER OUT

BU5V

IC11

IC12

IC10

FM AGC OUT

A8V

SW2

SW1

ILLUMI

VCC

BU5V

AUDIO+B

AM+B

FM+B

BACK LIGHT

KEY ILLUMI

Q51,55

SW5V

Q50

SERVO

BU5V FM+B

AM+B

A8V

P-CON

P-ANT

IC8

Q20

Q10

IC7

MUTE

Q223,224

IC4

KDC-2022/V/202MR/4023

● SWITCH UNIT (X16-1460-1x/2370-10)

COMPONENTS DESCRIPTION

Ref.No.

Application/Functions Operation/Condition/Compatibility

IC1 LCD driver & key matrix IC2 Remote Sencer

Q1 Key scan start When Q1 base goes Lo, key scan start.

● DAUGHTER UNIT (X89-2590-10)

Ref.No.

Application/Functions Operation/Condition/Compatibility

Q221, 222

Audio mute SW Audio preout is muted when the bose goes "H".

Q225 Audio mute driver Mute driver for audio mute SW.

● ELECTRIC UNIT (X25-9600-xx)

Ref.No.

Application/Functions Operation/Condition/Compatibility

IC1 System control µ-com System µ-com IC4 Power amplifire E-Vol output encoder power amplification for speaker. IC7 Power supply (Multi AVR) -

When a pin 1, 2, or 13 is "H", MUTE turns on

IC8 MUTE Logic When a pin 3, 4, or 5 is "H", P-AMP mute turns ON.

Changer is RESET when a pin 9, 10, or 11 is "L". IC10 Tuner & E-Vol. FM/AM tuner & stereo decoder & E-Vol. IC11 Power on reset When B.U. 5V voltage is less than 3.5V, power reset. IC12 E2P-ROM Writing and read-out of adjustment data for a tuner

Q10 B.U. detector BU on (base "H") : Collector "H" Q20 A.C.C detector ACC ON (bace : "H") : Collector "L" Q40 MUTE driver Base "L" : Mute on (collector "L") Q50 SW 5V Base "L" : SW5V on Q51 SERBO AVR control Pin 2 "H" : Serbo on (pin 4 "H") Q55 SERBO AVR Base "H" : Serbo on

Q70 Surge detector Base "H" : Surge detect Q101 DSI driver Base "H" : DSI on Q102 PANEL 5V SW Panel attch : PAN5V on

Q223,224

MUTE Base "H" : Mute on Q501 AM RF amplifire Base "H" : Gain UP Q502 FM RF amplifire Gate "H" : Gain UP

KDC-2022/V/202MR/4023

MICROCOMPUTER'S TERMINAL DESCRIPTION

● SYSTEM MICROCOMPUTER uPD780058GC499 (X25 : IC1)

Pin No. Name I/O Description Processing Operation

1 TDF DET I Panel detection H:Panel detached L:Panel attached 2 8EJE SW I

H:Eject is completed

Except 8cm CD model:always output L 3 NC O Not used (out put L) 4 Avss

H:Panel detached L:RESET 5 L-RST O LCD driver RESET ∆3 normal H , Power off L

When 7seg model,output L 6 L-CE O LCD driver selection

H:Select (panel communication)

When panel attached,output L 7 AVREF1 8 NC Not used (connected to 9pin) 9 IC10-DATA I/O IC10,E2PROM data communication ∆3 non communication : H

10 IC10-CLK O IC10,E2PROM clock communication ∆3 non communication : H

Non communication : H

11 L-DATAL I Data input from the LCD driver When panel detached : L

∆3 Pull down on X25 unit,Pull up on X16 unit

12 L-DATAS O Data output to the LCD driver When panel detached , output L 13 L-CLK O Clock output to the LCD driver When panel detached , output L 14 R-DATA I Data input from the RDS Except RDS model : output L 15 R-QUAL I Quality input from the RDS Except RDS model : output L 16 CH-DATAC I Data input from the changer (new 5L) Except changer model : output L

17 CH-DATAH O Data output to the changer (new 5L)

When non communication ,last data keeping

Except changer model : output L

18 CH-CLK I/O Clock input/output with the Changer (new 5L)

Check the old and new

Except changer model : output L

19 CH-REQH O Request output to the changer (new 5L)

L:Requset

Except changer model : output L

20 NC O Not used (output L) 21 AFS O

Noise detection time constant switching terminal

H:Normal L:FM/AM seek and AF search

∆3 (When tuner SRC auto zero , L)

22-24 NC O Not used (output L)

25 CH-CONT O Changer control

H:Changer on L:Changer off

Except changer model : output L

26 TYPE REF O 5V lines output for destination setting H:During destination reading 27 SD I Tuner SD input H:Station detected 28 NC O Not used (output L) 29 TYPE2 I Destination type selection terminal 2 Refer to destination type list. 30 TYPE1 I Destination type selection terminal 1 Refer to destination type list. 31 TYPE0 I Destination type selection terminal 0 Refer to destination type list. 32 TUNER-TYPE1 I Destination available/genuine model rool off H:genuine model 1 L:available model 33 Vss1 34 TUNER-TYPE0 I

Destination available/genuine model noise cancel

H:genuine model 0 L:available model

35 MUTE O Mute (E.Vol,Preset) control

H:mute on L:mute off

Power off after that 15 second L

36 M-DATA I/O Data input/output with the CD mechanism ∆3 non communication : H 37 M-CLK O Clock output to the CD mechanism ∆3 non communication : H

When adjustment = H

38 ADJ O Tuner lines adjustment PS1-0,1=L PS1-2,2-0,1=Hi-z

IC10-DATA,CLK=Hi-z

39 P-MUTE O Power IC mute control

H:mute off L:mute on

Power off after that 15 second H

40 SVR O Power IC servo control

H:When momentary power down detected

L:Nomal

41 P-STBY O Power IC standby control H:Power IC ON L:Power IC OFF 42 SW5V O

SW 5V control H:SW5V OFF L:SW5V ON

Power off after that 10 second H

KDC-2022/V/202MR/4023

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin No. Name I/O Description Processing Operation

43 B.U-DET I Back up detection terminal H:power down L:B.U. on 44 ACC-DET I ACC detection terminal H:ACC OFF L:ACC ON

45 PS1-0 O

Power supply IC SW1 control 0 Audio 8V,P-CON

46 PS1-1 O

Power supply IC SW1 control 1 Audio 8V,P-CON

47 PS1-2 O Power supply IC SW1 control 2 P-ANT

Power supply IC SW2 control 0

48 PS2-0 O

ILL,FM,AM

Power supply IC SW2 control 1

49 PS2-1 O

ILL,FM,AM

50 BEEP BEEP

H:Light on L:Light off

51 DSI O DSI control

When panel attached,output L When panel detached,flashing at the panel (H/L)

FIX model is output L 52 NC O Not used (out put L) 53 NC O Not used (out put L) 54 LOE/LIM SW I CD mechanism down&limit detection H:Chucking detection L:Normal 55 MO SW O CD mechanism loading motor control output H:Loading,Eject,Break L:Play 56 LO/EJ I/O

CD mechanism loading/Eject switching terminal

H:Eject L:Loading 57 M-STOP O Stop output to the CD mechanism H:Play L:Stop 58 M-RST O Reset output to the CD mechanism H:Normal L:CD mechanism reset 59 M-MUTE I Mute input from the CD mechanism H:mute off L:mute on 60 RESET Reset input from the System microcomputer 61 REMO I Remote control input 62 R-CLK I RDS clock input Except RDS model : output L

H:Changer detection 63 CH-REQC I Request input from the changer (new 5L) L:Request

Except Changer model : output L 64 LOS SW I CD mechanism loading's switch detected

H:No disc

L:DISK IN(Loading Start) 65 KEY-REQ I

Key input detected H:Key no input

(11pin L connected to the DATA L) L:Key input (edge key data reading start) 66 12EJE SW I 12cm disc detected L:12cm disc 67 Vss0 68 VDD1 69 X2 ∆3 MAIN X'tal oscillating circuit ∆3 4.19MHz X'tal connection 70 X1 ∆3 MAIN X'tal oscillating circuit ∆3 4.19MHz X'tal connection 71 IC TEST 72 XT2 Not used OPEN 73 XT1 74 VDD0 VDD Connected to VDD

75 AVREF0

A/D converter reference voltage control output,

connection to the 80pin AVCONT 76 S-METER I S-meter input 77 NOISE I FM noise detection input ∆3

2.5V or greater:NAVI MUTE

78 PHONE I 2way mute 1.0V or less:TEL MUTE

Except phone mute model : output L

79 NC O Not used (out put L) 80 AVCONT O A/D converter standard voltage control output

H:During A/D converter active same timing with PON

BA4911 SW1 Power supply IC output

PS1-2 PS1-1 PS1-0 A8V P-CON P-ANT

L L L STANBY LL(H)H(L)ON OFF OFF L H H ON ON OFF H H H ONONON

BA4911 SW2 Power supply IC output

PS2-1 PS2-0

ILLUMI

FM AM

L L STANBY

L(H)H(L)ON ON OFF

H H ON OFF ON

KDC-2022/V/202MR/4023

MICROCOMPUTER'S TERMINAL DESCRIPTION

● MECHANISM MICROCOMPUTER MN6627771KP (X32 : IC2)

Pin No. Name I/O Description Processing Operation

1 TVD O Traverse driver output (PWM output) 2 SPL O Spindle motor drive output (PWM output) 3 PC O Spindle motor ON output L:ON H:OFF (default ) 4 PWM O multi-purpose PWM output It's possible to setup the TOSF2 5 TBAL O Tracking balance adjust output (PWM output) 6 FBAL O Focus balance adjust output (PWM output) 7 NRFDET I RF detection signal input L:detected 8 OFT I Off-track signal input H:detected

9 BDO I Drop out signal input H:detected 10 LDON O Laser on signal output H:ON When command FO on,LDON is H 11 DSLB O DSL balance output 12 DVDD1 - Power supply for digital circuit 13 DVSS1 - Ground lines for digital circuit 14 AVSS2 - Ground lines for analog circuit For DSL,PLL and AD 15 DSLF I/O Loop filter terminal for DSL The bias of ARF output terminal in one 16 ARF I RF signal input 17 RFSW I When DSL circuit,constant switch terminal 18 PLLF I/O Loop filter terminal for PLL 19 PLLF2 I/O

Loop filter characteristic switching terminal for PLL 20 IREF I Standard voltage input terminal 21 RFENV I RF envelope signal input Analog input 22 TRCRS I Track cross signal input Analog input 23 TE I Tracking error signal input Analog input 24 FE I Focusing error signal input Analog input 25 AVDD2 - Power supply for analog circuit For DSL,PLL and AD 26 AVSS1 - Ground lines for analog circuit For audio output (Lch and Rch in one) 27 OUTR O Rch audio output 28 AVDD1 - Power supply for analog circuit For audio output (Lch and Rch in one) 29 OUTL O Lch audio output 30 DVSS3 - Ground lines for digital circuit 31 CSEL I Oscillation frequency specification terminal H:33.8488MHz L:16.9344MHz 32 NC O Not used 33 ASEL I Audio output polarity switching terminal L:Reverse H:Non reverse 34 MSEL0 I Destination type selection port (set 2bit) Order "MSEL 0" and "MSEL 1" Set up 35 MSEL1 I Destination type selection port (set 2bit) Order "MSEL 0" and "MSEL 1" Set up 36 ICRST O Reset control terminal for external DAC 37 BCLK O Bit clock output for serial data 38 LRCK O L/R identification signal output 39 SRDATA O Sirial data output 40 VREFP I A/D converter standard power supply input 41 HOT I

Temperature protection detection terminal (AD input)

Over C5(h):on 42 8EJE_SW I 8cm disc eject stop detection terminal H:Stop 43

12EJE/SDET_SW

I Judge the 8cm or 12cm disc 12cm disc stop detection terminal 44 LOE/LIM_SW I Pick-up inside detected Loading end detection terminal 45 PCK O PLL extracted clock output,etc 46 EFM O EFM signal output,etc 47 SENSE O Optics servo status signal output,etc 48 CLVS O

Spindle servo phase synchronous signal output,etc

L:Normal operation H:Luff servo 49 DEMPH O Dephase detection signal output,etc H:on 50 DVDD2 - Power supply for digital circuit 51 X1 I Main clock input terminal

KDC-2022/V/202MR/4023

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin No. Name I/O Description Processing Operation

52 X2 O Main clock output terminal 53 DVSS2 - Ground lines for digital circuit 54 XSUB1 I

When external DAC,external clock input terminal 55 XSUB2 O 56 TEST1 I Test port 1 Normal operation is H fixed 57 TEST2 I Test port 2 Normal operation is H fixed 58 NC O Not used 59 VER/HOR O Put length or breadth switching motor terminal H:Put length L:Put breadth 60 DRV_MUTE O Driver mute control terminal L:MUTE ON H:MUTE OFF 61 /MUTE_L O Audio Lch MUTE output L:MUTE 62 /MUTE_R O Audio Rch MUTE output L:MUTE 63 /RST I LSI reset input terminal H:Normal L:Reset 64 OCD_CLK I When OCD connected, clock input 65 /MSTOP I Standby detection terminal H:Normal L:Mecha stop 66 DATA I/O

I2C bus data line (communication line with system computer)

At that time serial writer connected

67 SBIO I

When connected to serial writer,data input terminal 68 /CLK I/O

I2C bus clock line (communication line with system computer)

At that time serial writer connected 69 TX O Digital audio interface signal output 70 EQCNT O RF EQ switching terminal L:x2 times H:x1 times 71 XSEL I During the external DAC connection MCLK external input (H:input) 72 MCNT I CD mecha Loading/Eject control ON/OFF L:OFF (HOST control) H:mechanism control 73 P-ON O Audio and servo origin power control terminal L:power on H:power off 74 MOTOR O Loading/Eject control switching terminal At that time LO/EJ is "H" 75 LO/EJ O Loading/Eject control terminal or output L When 72pin (P82) is "L",output "L" 76 CD-RW O CD-RW control terminal H:CD-RW L:normal 77 LDCNT O LD control terminal Operation is same LDON as timing 78 DVDD3 - Power supply for digital circuit 79 FOD O Focus driver output (PWM output) 80 TRD O Tracking driver output (PWM output)

TYPE2 TYPE1 TYPE0 MODEL NAME

L L L KDC-2024SA/SYA, 2024SG/SYG

uPD780058GC499

L L H KDC-2022, 2022V,202MR L H L RY-391CD, RX-491CD L H H KDC-4023, 2023, 3023 L L H KDC-122, 122S

uPD780058GC501 L H H KDC-1023, 1023S

H L H KDC-222, 222S

L L L KDC-3024G/YG, 307G/YG

uPD780058GC502

L H H KDC-3023R H L L KDC-3024A/YA, 307A/YA H L H KDC-4024/Y/V/YV

uPD780058GC503 L L L KDC-2094YA/YG

H: R135 R137 R139 L: R136 R138 R140

System mi-com Destination type list

KDC-2022/V/202MR/4023

ADJUSTMENT

IC10 (TDA7513) -The Tuner adjustment method

• When IC10 and its circumference are fixed, according to the following order, it readjusts if needed.

• The adjustment item changes with parts to exchange. Please refer to "Parts vs Adjustment item table".

1-1. VCO Coil Adjustment -- Adjustment of Tunning Voltage

Voltage Check Point : Vt-Check Land

(PWB Side_B, around D506) Adjustment Coil : L507 (VCO Coil) The adjustment method : VCO coil is turned and adjusted

according to the following tables.

M : AM Adjustment For Your Information : The frequency of SET is only set up by

Pre-Set-Key in case this adjustment

①The appearance and the coil with which S-METER DC voltage

serves as the maximum are turned and adjusted

in the above-mentioned SG input.

➁By the above-mentioned adjustment method, same adjustment

is performed to both sides (1st&2nd MIX Coil).

TYPE Mode freq. Voltage Fig

E/M AM 1611kHz 5.5 ± 0.1(V) (C)

K AM 1700kHz 5.8 ± 0.1(V) (C)

J FM 90.0MHz 5.6 ± 0.1(V) (C)

(Wide Band)

FM 108.0MHz 7.2 ± 0.1(V) (C)

1-2. Adjustment of 1st & 2nd-MIX Coil

Voltage Check Point : S_METER-Check Land

(PWB Side_B, around W572) Adjustment Coil : 1stIFT = L508 / 2ndIFT = L509 Setting of Signal Generator : Refer to the following tables

TYPE MODE freq. Mod. ANT Input Fig

K AM 1000kHz OFF 35dBuEMF (B),(C)

E,M,J,W AM 999kHz OFF 35dBuEMF (B),(C)

①The appearance and the coil with which S-METER DC voltage

serves as the maximum are turned and adjusted in the above-mentioned SG input.

➁By the above-mentioned adjustment method, same adjustment

is performed to both sides (ANT&RF Coil).

1-3. Adjustment of FM_ANT&RF Coil

Voltage Check Point : S_METER-Check Land (PWB

Side_B, around W572)

Adjustment Coil : ANT_Coil = L505

RF_Coil = L506

Setting of Signal Generator

: Refer to the following tables.

TYPE MODE freq. Mod. ANT Input Fig

E/M FM 87.5MHz OFF 5 or 11dBuEMF (A),(C)

K FM 87.9MHz OFF 5 or 11dBuEMF (A),(C) J FM 76.0MHz OFF 5 or 11dBuEMF (A),(C)

(Wide Band)

FM 65.0MHz OFF 5 or 11dBuEMF (A),(C)

1-4. Adjustment of STEREO (adjustment of 456k-VCO)

Adjust in TEST_MODE

• How to enter the test mode While pressing on [ FM ] and [ PRESET 6 ] keys, reset the unit.

• Adjustment method Complete on condition that show "ALL OFF" when pressing on [ PRESET 1 ] and [ PRESET 6 ] keys. (Writing adjustment valve to the EEPROM.) Effect of adjustment is in cofirmation of adjustment status at [ PRESET 4 ] key.

• Display of [ PRESET 4 ]

Adjustment "OK" : 14seg model "E2P OK" 7seg model "EPO" Adjustment "NG" : 14seg model "E2P ERR" 7seg model "EPE"

• Releasing the test mode Reset mode only. ACC off, Power off, Power down and Remove the panel mode is not releasing.

[Fig.3]

(

UNDER VIEW

)

[Fig.2]

[Fig.1]

(

OVER VIEW

)

(

REAR VIEW

)

(

TUNER ANT

)

(A)

(B)

S-METER Check Land

IC10

Vt Check Land

FM-SG

AM-SG

L509

L508

L507

L506

L505

(C)

DC Voltmeter

KDC-2022/V/202MR/4023

ADJUSTMENT

2.IC10 (TDA7513) Replacement-Parts vs Adjustment Item Table

• When the parts in the following tables are exchanged, please readjust according to a table.

• When other parts are exchanged, please perform only a check of operation. There is no necessity for readjustment.

Replacement parts Adjustment Item

Ref ANT

Parts Name Number TYPE Parts Number VCOVt 1st MIX 2nd MIX Coil RF Coil Stereo

IC10 ALL TDA7513 ™™™™™™

EEP-ROM M24C01-WMN6T

IC12 ALL BR24C01AF-W ™™™™™™

S-24CS02AFJ-TB

Antenna Coil J L31-0966-05

L505 E,K,M L31-0967-05 ™

(Wide Band)

L31-0968-05

RF Coil J L31-0969-05

L506 E,K,M L31-0970-05

™

(Wide Band)

L31-0971-05

VCO Coil J L32-0932-05

L507 E,K,M L32-0933-05 ™™™™™

(Wide Band)

L32-0934-05 1st MIX Coil L508 ALL L30-0770-05 ™ 2nd MIX Coil L509 ALL L30-0771-05 ™ Variable Capacitance Diodes

D504

J,E,K,M KV1720S

™™™™™

(Wide Band)

KV1735S Variable Capacitance Diodes

D505

J,E,K,M KV1720S

™™™™™

(Wide Band)

KV1735S Variable Capacitance Diodes

D506

J,E,K,M KV1720S

™™™™™

(Wide Band)

KV1735S X'tal X501 ALL L77-2077-05

✽ The "™" mark shows that the adjustment is need.

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