Kenwood KDC-5090B, KDC-5090BY Schematic

CD RECEIVER

KDC-5090B/BY

SERVICE MANUAL

Escutcheon assy (B07-3007-03)

KDC-5090B

47W 4

Plastic cabinet assy (A02-1497-13)

Front glass (B10-4236-11)

PTY

TI VOL ADJ

Lever (D10-4562-04)x2 (D10-4621-04)x2 : KDC-5090B

Panel assy (A64-2683-12)

DAB

Screw set (N99-1704-05)

Mounting hardware assy (J21-9641-13)

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).

DC cord (E30-4944-05): KDC-5090BY (E30-4958-05): KDC-5090B

Antenna adaptor (T90-0523/0534-05)

KDC-5090B/BY

BLOCK DIAGRAM ................................................................... 3

COMPONENT DESCRIPTION ................................................ 4

MICROCOMPUTER’S TERMINAL DESCRIPTION................. 6

TEST MODE ............................................................................ 8

ATTENTION ........................................................................... 10

PC BOARD ............................................................................. 11

CD PLAYER UNIT (X32-5010-00)....................................... 11

ELECTRIC UNIT (X25-87X2-7X) ....................................... 13

SWITCH UNIT (X13-99XX-X4)........................................... 14

SCHEMATIC DIAGRAM......................................................... 17

ELECTRIC UNIT (X25-87X2-7X) ....................................... 17

SWITCH UNIT (X13-99XX-X4)........................................... 21

CD PLAYER UNIT (X32-5010-00)...................................... 23

EXPLODED VIEW ................................................................. 25

PARTS LIST........................................................................... 27

SPECIFICATIONS............................................... BACK COVER

PLL+B

FM+B

Q45,47 Q46,48

AM+B

DIMMER

MUTE

2WAY

DET.

ACC

BU DET.

A8V

Q14,15

Q16,17

Q19-22

SERVO AVR

Q18

SERVO+B

SW5V

Q13

Q55,56

Q33

Q11,12

SW5V

BU5V

P CON

Q27,29

Q30,32

MUTE

IC3 Q7

DRIVER

MUTE

Q1,2,5,6

POWER IC

IC4

u-COM

F/E

E-VOL

IC2

PRE OUT

SP-OUT

DIMMER

TEL-MUTE

ACC

ANT-CONT

P-CONT

DECODER

RDS

IC1

IC7

Q51

ILLUM

BUFFER

NOISE

Q43

PRE OUT OUTPUT VOLTAGE

Q26

Q34

NAVI-MUTE

PANEL 5V

SW14V

PANEL POSITION DET.

QUAL

SERVO+B

MUTE R

STOP

SW2

LO/EJ

MUTE L

RST

SW3

SW1

SDA

SCL

A8V BU5V

SW5V

RST

REQ C

CLK

CH-CON

DATA H

REQ H

P MUTE

MUTE

SW5V

PANEL5V

ILL+B

SRT-SW1

SRT-SW2

RDCK

RDDA

QUAL

SDA

SCL

AFS

A8V

PLL DATA

PLL CLK

IFC OUT

S-METER

SW5V

DATA C

BACK UP

BU5V

CHANGER

230mV

1200mV

251mV

AUDIO OUT

FM+B

NOISE

MODEL

3600mV

855mV

1372mV

LEVEL

MO SW

BACK UP

BU5V

RESET IC

IC8

MATRIX

KEY

L DATAL

L CE L CLK/PANEL

DIMMER

REMO

PAN5V

RESET

DRIVER

MUTE

LCD DRIVER

IC1

IC2

Q55,56

Q3,4

ED1

RESET

LCD

(BACK LIGHT WLED)

DIMMER PWM CONTROL

REMO

G/R SW

LCD AVR

PANEL 5V

(X13- )

,42

PAN 5V SW

BLOCK DIAGRAM

KDC-5090B/BY

COMPONENT DESCRIPTION

●SWITCH UNIT (X13-99XX-X4)

Ref. No.

IC1 LC75808W LCD driver with the key matrix IC2 RS-171 Remote sensor IC Q1 DTA114EUA or KRA302 Key-permission SW For the key scanning start Q3 2SD2114K Red LED SW When a base goes Hi, RED LEDs are turned on. Q4 2SD2114K Green LED SW When a base goes Hi, GREEN LEDs are turned on. Q5 2SC2412K or 2SD601A VLCD AVR

Q6 DTA114EUA or KRA302 REMO SW

Q7 DTC143ZK Dimmer SW

●ELECTRIC UNIT (X25-87X2-7X)

Ref. No.

IC1 UPD703033GC117

IC2 TDA7407D E.VOL & N.C.MPX IC

IC3

IC4 TA8263BH Power AMP. IC IC7 TDA7479D RDS decoder IC8 S-80837ANNP Reset IC When BU 5V voltage is less than 3.7V, IC outputs Lo. Q1 DTC143TUA or KRC410 Pre mute (Front L) When Q1’s base goes Hi, Pre-output is muted. Q2 DTC143TUA or KRC410 Pre mute (Front R) When Q2’s base goes Hi, Pre-output is muted. Q5 DTC143TUA or KRC410 Pre mute (Rear L) When Q5’s base goes Hi, Pre-output is muted. Q6 DTC143TUA or KRC410 Pre mute (Rear R) When Q6’s base goes Hi, Pre-output is muted.

Q7 DTA124EUA or KRA303 Mute driver

Q11 2SC4081 or 2SD1819A Q12 2SB1548(P) Q11 and Q12 are inverted Darlington connection.

Q13 2SA1576A or 2SB1218A SW 5V

Q14 2SC4081 or 2SD1819A Q15 2SB1548(P)

Q16 DTC124EUA or UN5212

Q17 DTA124EUA or KRA303 Q18 2SD2375 SERVO +B AVR When Q18’s base goes Hi, SERVO +B AVR outputs 8V. Q19 DTC124EUA or UN5212

Q20 DTA124EUA or KRA303

Component Name Application / Function Operation / Condition / Compatibility

While a base goes Lo, PAN 5V is supplied to the Remote sensor IC. Usually Q7’s base goes Hi. When DIMMER mode is selected, pulse wave shape is applied to Q7’s base.

Component Name Application / Function Operation / Condition / Compatibility

or UPD703033GC145

HD74HC02FP or TC74HC02AF

System MI-COM.

Mute logic 2-input NOR x 4

When BU detection SW or System RESET or MI-COM.’s Pre-mute is working, a base goes Lo, and Q7 is turned on.

BU 5V AVR

A8V AVR When Q14’s base goes Hi, A8V AVR outputs 8V.

SW14V SW While Q16’s base goes Hi, Q17 is turned on, A8V AVR and

ILL +B SW While Q19’s base goes Hi, Q20 is turned on, and ILL +B

While BACKUP is applied, AVR outputs +5V.

While a base goes Lo, SW 5V is supplied to the microprocessor peripheral circuits.

A8V AVR and SERVO +B AVR ON/OFF control

SERVO +B AVR are working.

ILL +B AVR ON/OFF control

AVR is working.

KDC-5090B/BY

COMPONENT DESCRIPTION

Ref. No.

Q21 2SB1184 Q22 2SC4081 or 2SD1819A Q26 DTC144EUA or UN5213 Small lamp detection SW When vehicle small lamps turn on, Q26 is turned on . Q27 DTC114YUA or UN5214 Q32 2SB1277(Q,R) 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.

Q33 2SC4081 or 2SD1819A BU detection SW turned on. When momentary power down has detected,

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

Q43 2SC4081 or 2SD1819A Noise buffer Q45 DTC124EUA or UN5212 Q47 2SB1277(Q,R) Works during FM reception mode. Q46 DTC124EUA or UN5212 Q48 2SB1277(Q,R) Works during AM reception mode. Q51 DTC144EUA or UN5213 IFC buffer Waveform shaping Q52 2SC4081 or 2SD1819A Composite signal output buffer Q55 2SA1576A or 2SB1218A Q56 DTC124EUA or UN5212 and Q55 is turned on.

Component Name Application / Function Operation / Condition / Compatibility

ILL +B AVR

P-CON SW

FM +B SW

AM +B SW

PAN 5V SW

While Q22’s base goes Hi, AVR outputs +10.5V. Works during POWER ON mode with a panel attached to the set.

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

While BACKUP is applied, a base goes Hi, and Q33 is

a base goes Lo, and Q33 is turned off.

When BU detection SW or MI-COM.’s mute is working, a base goes Hi, and Q42 is turned on.

When Q45’s base goes Hi, Q47 is turned on.

When Q46’s base goes Hi, Q48 is turned on.

While a panel is attached to the set, Q56’s base goes Hi,

●CD PLAYER UNIT (X32-5010-00)

Ref. No.

IC1 AN22000AA RF amplifier error and tracking error) signals.

IC2 MN662774KG1 CD signal processor bult-in MI-COM. IC4 BA5917AFP 4CH BTL driver IC6 NJM4565MD OP Amp. Low pass filter Q1 MCH6101 APC LD power control

Q2 DTC124EUA P ON SW

Q3 DTA143XUA A.8V SW Q4 2SA1362 (Y) D.5V SW

Q5 DTC124EUA MOTOR SW

Component Name Application / Function Operation / Condition / Compatibility

Generation of RF signal based on the signals from the APC circuit and pickup, and generation of servo error (focusing

Detection of dropout, anti-shock, track crossing and off-track conditions, Gain control function building in.

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

When CD source is selected, Q2’s base goes Hi, Q3 and Q4 are turned on. A8V ON/OFF control. When a base goes Lo, Q3 is turnde on. D5V ON/OFF control. When a base goes Lo, Q4 is turnde on. When CD loading or eject operation is activating, Q5’s base goes Hi, Q4 is turned on.

KDC-5090B/BY

MICROCOMPUTER’S TERMINAL DESCRIPTION

IC1 (ELECTRIC UNIT : X25-87X2-7X)

Pin No. Pin Name I/O Description Processing Operation

1 AM+B O AM+B control Hi : During AM reception 2 FM+B O FM+B control 3 AFS O 4 PLL-DATA I/O Data input/output with F/E 5 PLL-CLK I/O Clock input/output with F/E 6 EVDD - Positive power supply connection terminal Connected to BU 5V lines. 7 EVSS - Ground connection terminal Connected to GND lines. 8 NC O Not used (N.C.) 9 BEEP O BEEP sound output 10 REMO I 11 CH-REQH O Request output to changers Lo : Request 12 CH-RST O Reset output to changers : Reset 13 IC2-SDA I/O 14 IC2-CLK I/O 15 CH-MUTE I Mute request from changers Hi : Mute request 16 CH-CON O Changer control Hi : Operation mode, Lo : Standby mode 17 18 TEST - Test terminal Not used (Connected to GND lines) 19 P-MUTE O Power IC mute control output Lo : Mute (POWER OFF, TEL MUTE) 20 P-STBY O Power IC standby control output 21 MUTE O IC2 mute control output Hi : Mute on 22 NC O Not used (N.C.) 23 PRE-MUTE O Pre-outputs mute control output Lo : Mute 24 ACC-DET I ACC detection input Hi : ACC OFF, Lo : ACC ON 25 DIMMER I Small lights detection input Lo : During vehicle small lamps turn on. 26 SW5V O SW 5V control output

28 P-CON O Power control output Hi : POWER ON mode except ALL OFF mode. 29 ANT-CON O Antenna control output Hi : During FM/AM reception or TI reception. 30 P-ON O SW 14V control output 31 RESET I Reset input terminal Lo : System reset 32 XT1 I Sub clock resonator connection terminal Clock count during POWER OFF mode 33 XT2 - Sub clock resonator connection terminal 34 REGC - C terminal

35 X2 - Main clock resonator connection terminal

36 X1 I Main clock resonator connection terminal 37 VSS - Ground connection terminal Connected to GND lines. 38 VDD - Positive power supply connection terminal Connected to BU 5V lines. 39 CLKOUT O Internal system clock output Not used (N.C.) 40,41 NC O Not used (N.C.) 42~45 46 IC2TYPE0 I IC2 setting terminal Lo : Initial value 47 IC2TYPE1 I IC2 setting terminal Lo : Initial value

DIMMER-CON

EXT-AMP-CON

TYPE0~TYPE3

Noise detection time constant switching terminal

Data input from the remote control light sensor

Data line with IC2, IC5 and CD MECHA. MI-COM. Clock line with IC2, IC5 and CD MECHA. MI-COM.

O Dimmer control output Pulse wave shape : DIMMER mode, Hi : POWER ON

O External amp. control output Bass boost LOW__Hi : 130msec, Lo : 70msec

I Destination type input terminal 0~3

Hi : During FM reception, Hi : Last FM mode (only RDS model) Hi : During FM reception, Lo : During FM seek or AF search

Hi : POWER ON mode except panel detached or panel mask position

Lo : POWER ON mode or during CD loading/eject action. Bass boost OFF__Hi : 160msec, Lo : 40msec

Bass boost HI__ Hi : 100msec, Lo : 100msec

Hi : POWER ON mode or during CD loading/eject action

Oscillation stop : POWER OFF mode or momentary power down detected

KDC-5090B/BY

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description Processing Operation

48~51 NC O Not used (N.C.) 52 ILL-ON O Illumination AVR on/off control output 53 M-MUTE L I 54 M-MUTE R I 55 BVDD - Positive power supply connection terminal Connected to BU 5V lines. 56 BVSS - Ground connection terminal Connected to GND lines. 57 M-RST O Reset output to CD MECHA. MI-COM. Lo : Reset 58 M-STOP O Stop request to CD MECHA. MI-COM. Lo: Stop mode, Hi : Operation mode 59 NC O Not used (N.C.) 60 LO/EJ I/O CD MECHA. loading/Eject switching output Lo : Loading, Hi : Eject, Hi-Z : Stop or Break 61 MOSW O CD mechanism loading motor control output Hi : CD loading/eject action or Break, Lo : other 62 NC O Not used (N.C.) 63 CD-SW3 I Down & limit switch detection input Hi : Chucking, Lo : Pickup most inner position 64 NC O Not used (N.C.) 65 L-CE I/O CE output to LCD driver 66~69 NC O Not used (N.C.) 70 AVCONT O 71 AVDD 72 AVSS 73 AVREF I 74 PHONE I PHONE detection input 75,76 NC (GND) I Not used (pull down to GND lines) 77 SRT-SW2 I SRT position detection input 78 SRT-SW1 I SRT position detection input Mask : (SW1, SW2) = (Lo, Lo) 79 NOISE I FM noise detection input 80 S-METER I S-meter input from F/E 81 R-DATA I Data input from the RDS decoder IC Except RDS model : Not used (pull down to GND lines) 82 R-QUAL I Quality input from the RDS decoder IC Except RDS model : Not used (pull down to GND lines) 83 IFC-OUT I F/E IFC OUT input terminal Hi : Station detected, Lo : Not detected 84,85 NC (GND) I Not used (pull down to GND lines) 86 NC O Not used (N.C.) 87 R-CLK I Clock input from the RDS decoder IC Except RDS model : Not used (pull down to GND lines) 88 CH-REQC I Request input from changers Lo : Request 89 KEY-REQ I 90 CD-SW1 I Loading detection Lo : CD chucking. 91 CD-SW2 I 12cm disc detection terminal 92 NC O Not used (N.C.) 93 BU-DET I Momentary power down detection input 94 CH-DATAC I Data input from changers 95 CH-DATAH O Data output to changers 96 CH-CLK I/O Clock input/output with changers 97 L-DATAL I Data input from the LCD driver IC 98 L-DATAS I/O Data output to the LCD driver IC

99 L-CLK I/O

100 PAN5V O Panel 5V control Hi : Panel attached, Lo : Panel detached

Mute request (Lch) from CD MECHA. MI-COM. Mute request (Rch) from CD MECHA. MI-COM.

A/D converter reference voltage control output A/D converter positive power supply connection terminal A/D, D/A converter ground connection terminal A/D converter reference voltage input terminal

Communication request input form LCD driver IC

Clock output to the LCD driver IC /Panel detaching detection input (LCD Driver)

Hi : POWER ON mode except panel detached or panel mask position Lo : Mute request Lo : Mute request

Hi : Active, Connected to AVREF terminal. Connected to BU 5V lines. Connected to GND lines.

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

Panel : (SW1, SW2) = (Hi, Hi) , Slide : (SW1, SW2) = (Hi, Lo)

When 12cm disc was detected, the input becomes Lo temporarily.

Hi : When momentary power down detected or BU OFF, Lo : BU ON

Lo : Panel attached

KDC-5090B/BY

TEST MODE

1. How to enter the test mode

While holding the FM and Preset 6 keys, reset the unit.

2. How to exit from the test mode

While holding the Preset 6 key, reset the unit. (Note) The test mode cannot be terminated by ACC OFF,

power OFF or momentary power down.

3. Initial status in the test mode

• Sources : ALL OFF

• Display : All segments are lit.

• Volume : –10dB (displayed as “30”)

• Loudness : OFF

• CRSC : OFF regardless of the presence of switch-

ing function.

• SYSTEM Q : Flat

4. Special display in Tuner mode

When any of the following messages is displayed in Tuner mode, the F/E may be abnormal.

• “TNE2P NG” : The EEPROM is set to the default (unstable values) because the F/E was shipped without passing through the adjustment process, etc.

• “TNCON NG” : Communication with the F/E is not possible.

5. Forced switching of K3I

Each press of the Preset 6 key in Tuner mode should switch K3I from AUTO → Forced Wide → Forced Middle → Forced Narrow → AUTO. The initial status is AUTO and the display shows these modes as follows.

• AUTO : FMA

• Forced Wide : FMW

• Forced Middle : FMM

• Forced Narrow : FMN

6. Test mode specifications of the CD receiver

• Forced ejection is inhibited in the reset start operation. When the unit is reset while a CD is loaded in it, the CD is not recognized by resetting.

• Each press of the Track Up key jumps to the following track numbers: No. 9 → No. 15 → No. 10 → No. 11 → No. 12 → No. 13 → No. 14 → No. 9 (The cycle restarts from here.)

• Each press of the Track Down key jumps to the previous track number to the track being played.

7. Audio-related specifications

• A short press of the Q key initiates the audio adjustment mode.

• Pressing the ✽ key on the remote initiates the audio ad- justment mode.

• Continuous holding of a remote control key is inhibited.

• Bass, Middle and Treble are adjusted in 3 steps of Min /

Center / Max with the Track Up/Down keys.

• Balance is adjusted in 3 steps of Left Max / Center / Right Max with the Track Up/Down keys.

• Fader is adjusted in 3 steps of Rear Max / Center / Front Max with the Track Up/Down keys.

• HPF is adjusted in 2 steps of Through/220Hz with the Track Up/Down keys.

• LPF is adjusted in 2 steps of Through/120Hz with the Track Up/Down keys.

• Bass f, Bass Q, Bass EXT, Middle f, Middle Q and Treble f are not dealt with by the audio adjustment.

8. Menu-related specifications

• A short press of the CLK key initiates the Menu mode.

• Pressing the DNPP/SBF key on the remote initiates the

Menu mode.

• Continuous holding of a remote control key is inhibited.

• Contrast is adjusted in 3 steps of 0/5/10 and the default is

9. Backup current measurement

When the unit is reset while ACC is OFF (i.e. by turning Backup ON), the MUTE terminal goes OFF in 2 seconds in place of 15 second. (The panel and CD mechanism are not activated at this time.)

TEST MODE

KDC-5090B/BY

10. Special display when the display is all on

Pressing the Preset keys while the power is ALL OFF displays the following information.

[PRESET 1] Version display (8 digits, Month/Day/Hour/Minute)

(Display) SYS xxxxxxxx System microcomputer [PRESET 3] Short press : View power ON time. (The All OFF period is not counted.)

Long press/hold : Clear power ON time.

(Display) PonTim xxxxx Max. 65535 (hours) [PRESET 4] Short press : Display CD operation time.

Long press/hold : Clear CD operation time

(Display) CDTime xxxxx (CD/R) Max. 65535 (hours) [PRESET 5] Short press : Display CD ejection count.

Long press/hold : Clear CD ejection count.

(Display) EjeTim xxxxx Max. 65535 (times) [PRESET 6] Short press : Display Panel open/close count.

Long press/hold : Clear Panel open/close count.

(Display) PnCnt xxxxx Max. 655350 (times)

11. Other specifications

• Messages such as “CODE OFF” are not displayed when power is turned ON.

• Pressing the TI (AUTO) key during changer operation turns 2zone ON. 2zone can be turned OFF by pressing the TI (AUTO) key again. The P/S dot lights while 2zone is ON.

• Pressing and holding the CLK key for a second in the ALL OFF status the Mask Key (security) write mode.

• Security-related information

1. Forced Power ON mode (All models)

Even when the security (Mask key) is approved, resetting the unit while holding the ATT and Preset 4 keys makes it possible to turn the power ON for 30 minutes. After 30 minutes have elapsed, it is not possible to return to the previous condition unless the unit is reset again.

2. Method of registration of the security code after EEPROM (Tuner Unit Ass’y) replacement (Code security model)

1) Enter the test mode. (See 1. How to enter the test mode)

2) Press the CLK key to enter the security registration mode.

3) Enter the code using the Preset 1/2/3/4 keys. Example : To enter “3510”

• Press the Preset 1 key 4 times.

• Press the Preset 2 key 6 times.

• Press the Preset 3 key twice.

• Press the Preset 4 key once.

4) Hold down the DISP key for at least 3 seconds and the message, “RE-ENTER” appears, so once again enter the code according to Step 3) above.

5) Press and hold the DISP key for 3 seconds until “APPROVED” is displayed.

6) Exit from the test mode. (See 2. How to exit from the test mode)

(Note) All Clear is not applicable to the security code of

this model.

3. Method of writing the Mask key while the EEPROM is in the initial status

1) Enter the test mode. (See 1. How to enter the test mode)

2) Press the CLK key to enter the Mask key registration mode. “TRANSMIT1” should be displayed now. The display at this time should show “< >” in place of “ [ ] ”.

3) Point the Mask key remote toward the light sensor, and press and hold its key for more than 0.5 second.

4) When “TRANSMIT2” is displayed, press and hold the key on the Mask key remote for more than 0.5 second again. The first and second counter codes are not compared at this time.

5) When “APPROVED” is displayed, the write operation is complete. Now the demonstration mode is initiated and the test mode is terminated.

(Note) In the same way as previous models, if 30 minutes

have elapsed with no code written, an error occurs and the power is turned OFF.

+ 18 hidden pages

Kenwood KDC-5090B, KDC-5090BY Schematic

CONTENTS

BLOCK DIAGRAM

COMPONENT DESCRIPTION

TEST MODE