Kenwood KDCZ-727, Z-727 Service manual

2001-5 PRINTED IN JAPAN

B51-7791-00 (N) 1737

CD.MD-CH CONTROL CD RECEIVER

KDC-Z727 Z727

SERVICE MANUAL

SRC

PWR

OFF

47Wx4

S.A

DISC

CD MD-CH CONTROL CD RECEIVER

KDC-Z727

AUD

4.5V

PREOUT

LOUD

DISP

SCAN RDM REP M.RDM AUTO

AME

NAME.S

COMPACT

DIGITAL AUDIO

ZONE

DAB

TEXT

DPAC

SRC

PWR

OFF

47Wx4

S.A

DISC

CD MD-CH CONTROL CD RECEIVER

AUD

LOUD

DISP

SCAN RDM REP M.RDM AUTO

AME

NAME.S

COMPACT

DIGITAL AUDIO

ZONE

DAB

TEXT

SIZE AAA BATTERY (Not supplied)

Plastic cabinet assy (A02-2711-08)

Panel assy (A64-2473-08)

Front glass assy (B10-4204-08)

Escutcheon (B07-3038-08)

Panel assy (A64-2625-08)

Front glass assy (B10-4203-08)

Escutcheon (B07-3048-08)

Remote controller assy (A70-0894-05)

Mounting hardware assy (J21-9585-18)

DC cord assy (E30-6021-08)

Lever (D10-4364-08)x2

Stay (J54-0606-04)

Screw set (N99-1700-05)

Screw set (N99-1716-08)

KDC-Z727

Z727

RC-520

KDC-Z727,Z727

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

COMPONENTS DESCRIPTION.....................................................................5

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

TEST MODE .................................................................................................11

PC BOARD...................................................................................................12

SCHEMATIC DIAGRAM ..............................................................................19

EXPLODED VIEW ........................................................................................27

PARTS LIST .................................................................................................29

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

KDC-Z727,Z727

220mV

490mV

FM : 400Hz 75kHzDEV 60dBuV AM : 400Hz 30%MOD 74dBuV

: 1kHz 0dBCD : 1kHz 0dBCD-CH : 1kHz 1200mV INPUTAUX

VOL MAX

CD-CHCD/CD-CH

CD : 1150mV

: 1150mV

AUX-IN 1150mV

: 830mVFM : 250mV

: 1800mV

AUX

CD-CH

: 1800mVCD

CD-CH

AUX

: 1800mV

AMFM: 250mV

: 830mV

CD-CH AUX

: 900mV : 900mV

: 900mV

FMAM: 415mV

: 125mV

MUX

REAR

FRONT

FRONT REAR

REAR

FRONT

REAR

FRONT

: 4500mV : 4500mV : 4500mV

: 650mV

: 2100mV

CD-CH AUX

AM CD

FRONT

: 4500mV

: 4500mVCD

AUX

CD-CH

REAR

FM : 2100mV

: 650mV

: 4500mV : 4500mV : 4500mVAUX

CD-CH

: 650mV

N/F FM : 2100mV

BU 5V

SW 5V

PNL 5V

AUDIO 8V

AUDIO 11V

SERVO 7.5V

VFD 14V

AC OUT

EPROM

TUNER

SGS-IC '01 ST

TDA7407

E-VOL

UPD703033AGC

MAIN u-COM

ANT

IC300

IC900

HD74HC27FP

MUTE IC

IC3

SW-OP AMP

BA3129F

IC201

IC200

BA3121F

GND-ISO

TDA7401D

H.P.F

IC301

S-80842

RST

IC2

ANNP

PANEL u-COM

UPD703033AGC

IC900

LEVEL SIFT TC74HC4050AFT

MATRIX

KEY

RS-171

REMO

MSM531622F-

ROM

IC961

IC930

IC950

VFD

BA3830F

SA-IC

IC940

NJM4565MD

IC202

SA MIX AMP

TA8263BH

POWER IC

IC500

IC310

NJM4565MD

IC312

NJM4565MD

IC311

BU 5V

Q614

SW 5V

Q612

PNL 5V

Q622

AUDIO 8V SW 14V

Q624

AUDIO 11V

Q633 Q624

SW 14V

CD 7.5V

Q620

SW 14V

Q624

VFD 14V

Q618

BU 14V

AUX-IN

CD-CH

BLOCK DIAGRAM (KDC-Z727)

KDC-Z727

KDC-Z727,Z727

220mV

490mV

FM : 400Hz 75kHzDEV 60dBuV AM : 400Hz 30%MOD 74dBuV

: 1kHz 0dBCD : 1kHz 0dBCD-CH : 1kHz 1200mV INPUTAUX

VOL MAX

CD-CHCD/CD-CH

CD : 1150mV

: 1150mV

AUX-IN 1150mV

: 1500mVFM : 540mV

: 2600mV

AUX

CD-CH

: 2600mVCD

CD-CH

AUX

: 2600mV

AMFM: 540mV

: 1500mV

CD-CH AUX

: 1300mV : 1300mV

: 1300mV

FMAM: 750mV

: 270mV

MUX

REAR

FRONT

FRONT REAR

REAR/NF

FRONT

REAR

FRONT

: 2350mV : 2350mV : 2350mV

: 480mV

: 1350mV

CD-CH AUX

AM CD

FRONT

: 2350mV

: 2350mVCD

AUX

CD-CH

REAR/NF

FM : 1350mV

: 480mV

BU 5V

SW 5V

PNL 5V

AUDIO 8V

SERVO 7.5V

VFD 14V

AC OUT

EPROM

TUNER

SGS-IC '01 ST

TDA7407

E-VOL

UPD703033AGC

MAIN u-COM

ANT

IC300

IC900

HD74HC27FP

MUTE IC

IC3

SW-OP AMP

BA3129F

IC201

IC200

BA3121F

GND-ISO

TDA7401D

H.P.F

IC301

S-80842

RST

IC2

ANNP

PANEL u-COM

UPD703033AGC

IC900

LEVEL SIFT TC74HC4050AFT

MATRIX

KEY

RS-171

REMO

MSM531622F-

ROM

IC961

IC930

IC950

VFD

BA3830F

SA-IC

IC940

NJM4565MD

IC202

SA MIX AMP

TA8263BH

POWER IC

IC500

BU 5V

Q614

SW 5V

Q612

PNL 5V

Q622

AUDIO 8V SW 14V

Q624

CD 7.5V

Q620

SW 14V

Q624

VFD 14V

Q618

BU 14V

AUX-IN

CD-CH

BLOCK DIAGRAM (Z727)

Z727

KDC-Z727,Z727

● SUB-CIRCUIT UNIT (X13-9930-00)

COMPONENTS DESCRIPTION

Ref.No.

Element/Function

Operation/Condition

IC1 SYS u-COM IC2 RESET System reset

IC3 GATE IC Gate IC for muting IC200 GND-ISO GND-ISO for CD-CH IC201 SW-OP CD/CD-CH input switching IC202 Buff SA buffer and 1/2 Vdd IC300 E-VOL/MPX E-VOL/MPX IC301 SYSTEM E'S SYSTEM E'S IC310-312

Buff Buffer for 4.5 V PRE-OUT IC500 POWER AMP IC900 PNL u-COM IC930 REMOCON Remote control light sensor IC940 SA BPF BPF for SA IC950

EXTENSION ROM IC960

3.3V POWER SUPPLY IC

3.3 V power supply

IC961 LEVEL SHIFT IC 5V-3.3 V level shifting

Q1 5V SW Q2 MUTE SW Muting SW for PRE-OUT Q3 CH RST SW Q4 LED SW LED SW for DISC_ and EJ SW Q5 PNL5V SW Q6 PNL5V SW Q9 Buff IFC buffer

Q10 LED SW LED SW for DSI

Q100,101

FM+B SW Q102,103

AM+B SW

Q200 MD/CD-CH SW CD/CD-CH signal switching Q201 MUTE DRV For SA muting Q202 ALC ALC Q300 MUTE E-VOL muting SW

Q350A,B

MUTE DRV PRE-OUT muting Q351A,B

MUTE DRV PRE-OUT muting

Ref.No.

Element/Function

Operation/Condition

Q352A,B

MUTE DRV PRE-OUT muting Q600 BU DET B-U ON/OFF detection Q601 Acc DET Acc ON/OFF detection Q602 P-ANT SW Q603 P-ANT SW Q604 P-CON SW Q605

P-CON PROTECT Q606

P-CON PROTECT Q607 P-CON SW Q608 DIMMER SW Q609

EXT AMPCON SW

Q611,612

PNL5V AVR 5V panel power supply

Q613,614

BU5V AVR 5V uCOM power supply

Q615,616

DD-CONV SW

Q617,618

DD-CONV AVR DC/DC converter power supply

Q619,620

SURVO7.5V AVR

7.5V CD mechanism power supply

Q621,622

AUDIO8V AVR 8V Audio power supply

Q623 14V SW

8V Audio, 5 V DSP,

7.5 V SERVO

Q624 14V SW

8V Audio, 5 V DSP,

7.5 V SERVO

Q632,633

AUDIO DC/DC 11V Audio DC/DC CONV

11V AVR power supply

Q801-803

AUDIO -9V SW

Q804,805

AUDIO 9V SW Q806 AUDIO 9V SW Q900 LED SW

LED SW for SRC and KENWOOD logos

Q930,931

PNL5V SW

5V Panel SW for SA-BPF and REMOTE-CON

Q960 BK SW

Q961,962

VFD SW

KDC-Z727,Z727

● System Microcomputer UPD703033GC060 (IC1 : Main unit) PinNo.

Pin name I/O Description Processing Operation

1 AMP_MUTE O Muting control output to Power IC Muting ON: Low. Muting OFF: High. 2 AMP_STBY O Standby control output to Power IC

Standby canceled: High. Standby mode: Low. 3 NC O Output open 4 NC O Output open 5 P_ANT O Power antenna control output

Radio mode: High. Other mode: Low. 6 EVdd Connected to B-U 5 V 7 EVss Connected to GND 8 P_CONT O Power control output ON: High. OFF: Low. 9 BEEP O Beep output Permanently "L".

10 EXT_AMP O External amp control output 11 DIMMER I Dimmer detection input

Dimmer ON: Low. Dimmer OFF: High.

12 CH_CON O CD-CH control output ON: High. OFF: Low. 13 CH_REQH O CD-CH send request output Request: Low. 14 DSP_DATA O Data output to DSP_IC (M65849BFP) 15 DSP_STB O Strobe output to DSP_IC (M65849BFP) 16 DSP_CLK O Clock output to DSP_IC (M65849BFP) 17 NC O Output open. 18 IC/Vpp 0 Test 19 IN_SEL O CD/CD-CH switching control output

CD: Low. CD-CH: High. Other source: L.

20 SA_MUTE O Signal muting output to spectrum analyzer MUTE ON:HI 21 I2C_SDA I/O

Data input/output from/to CD mechanism, E-VOL (TDA7407) and HPF

22 I2C_SCK I/O

Clock output to CD mechanism, E-VOL (TDA7407) and HPF 23 MUTE O Muting control output (N-CH open drain) MUTE ON:HI, MUTE OFF:LO 24 SW5V O 5 V SW control output (N-CH open drain) SW5V ON:LO, SW5V OFF:HI 25 F/E_DATA I/O

Data input/output from/to F/E and PROM (N-CH open drain) 26 F/E_CLK I/O Clock output to F/E and PROM (N-CH open drain)

PRE_OUT_MUTE

O PRE-OUT muting control output

Muting ON: Low. Muting OFF: High. Momentary power down: Low.

28 IFC I IF_COUNT input from F/E

Station detected: Low.

Station not detected: High. 29 AM+B O AM power supply control output AM ON:HI, AM OFF:LO 30 FM+B O FM power supply control output FM ON:HI, FM OFF:LO 31 RESET I Reset input LO:RESET ON 32 XT1 Connected to Sub X'tal 33 XT2 Connected to Sub X'tal 34 REGC 1 uF connected to GND. 35 X2 Connected to Main X'tal 36 X1 Connected to Main X'tal 37 Vss Connected to GND 38 Vdd Connected to B-U 5 V 39 CLKOUT Open 40 NC O Output open. 41 NC O Output open. 42 P_ON O Internal power supply control ON:HI, OFF:LO 43 VFD_ON O VFD power supply control output VFD ON:HI, VFD OFF:LO 44 NC O Output open.

PNL 5 V ON: High. PNL 5 V OFF: Low. 45 PNL5V O 5 V panel control output

Panel detached:Low. Momentary power

down: Low.

MICROCOMPUTER'S TERMINAL DESCRIPTION

KDC-Z727,Z727

MICROCOMPUTER'S TERMINAL DESCRIPTION

PinNo.

Pin name I/O Description Processing Operation

46 NC O

47 PNL_DET I Panel position detection input

Panel open (SW ON): Low.

Panel closed (SW OFF): High. 48 CD_MUTE I Muting input from CD mechanism MUTE:LO 49 CD_MRST O Reset output to CD mechanism RESET:LO 50 CD_MSTOP O Stop request to CD mechanism STOP:LO 51 CD_LO/EJ I/O CD mechanism loading motor control (Load/Eject) LOAD:LO EJ:HI 52 CD_LMON O CD mechanism loading motor control (ON/OFF) LOAD:LO EJ:HI 53 CD_SW3 I Input from CD mechanism SW3 (DOWN_SW input) ON:HI 54 NC O Output open. 55 BVdd Connected to B-U 5 V 56 BVss Connected to GND 57 DSI O DSI LED control output

Panel detached: ON. Panel attached: OFF.

58-64 NC O Output open.

PN_MC_REQ/PANEL

I/O

Send request output to Panel uCOM/Panel detection input Panel detection input. Panel ON: Low. 66 PAN_RST O Reset control output to Panel uCOM Same function as PNL 5 V. 67 LED_SW O

LED control output for EJECT SW and DISC _OUTPUT open.

ILL ON:HI, ILL OFF:LO

68,69 O Output open.

70 AVCONT O A/D reference voltage control output During operation: High. 71 AVdd Connected to B-U 5 V 72 AVss Connected to GND 73 AVref A/D reference voltage 74 PHONE I PHONE detection input

TEL muting: 1 V or less. NAVI muting: 2,5 V or more.

75-78 NC I Resistor connected to GND

79 MP3/CD I MP3/CD identification input CD: Low. MP3: High. 80 S-METER I FM S-meter input from F/E (Analog input) 81 TYPE1 I Destination type ID input

K (North America): H. M (General overseas): L

82 TYPE2 I Destination type ID input

K (North America): H. M (General overseas): H 83 NC I Resistor connected to GND 84 ST_TYPE1 I E-VOL setting selection input Normal: Low. Special: High. 85 ST_TYPE2 I E-VOL setting selection input Normal: Low. Special: High. 86 NC O Output open. 87 DISC_EJ_SW I CD EJECT SW input (Interrupt input) CD ejection: Low. (Interrupt input) 88 CH_REQC I Send request input from CD-CH (Interrupt input) ON: Low. (Interrupt input) 89 PN_SC_REQ I Send request from Panel uCOM (Interrupt input) 90 CD_SW1 I Input from CD_SW1 (Loading SW detection) LO:ON, HI:OFF 91 CD_SW2 I Input from CD_SW2 (12 cm CD detection) LO:ON, HI:OFF 92 ACC_DET I Acc detection input HI:ACC OFF, LO:ACC ON

B-U power down: High. B-U normal: Low. 93 BU_DET I B-U detection input (Interrupt input)

Muting and mechanism operation stop should

be executed quickly. (Interrupt input) 94 CH_DATAC I Data input from CD-CH 95 CH_DATAH O Data output to CD-CH 96 CH_CLK I/O Clock input/output from/to CD-CH 97 PN_SC_DATA I Data input from Panel uCOM 98 PN_MC_DATA I/O Data output to Panel uCOM 99 PN_MC_CLK O Clock output to Panel uCOM

100 NC O OUTPUT OPEN

KDC-Z727,Z727

● Panel Microcomputer UPD703033GC062 (IC900 : Control uCOM) PinNo.

Pin name I/O Description Processing Operation

1 VFD_DATA1 O Data output "1" to VFD driver 2 VFD_CLK O Clock output to VFD driver 3 NC I Resistor connected to GND 4 VFD_DATA2 O Data output "2" to VFD driver 5 VFD_CLK_IN I

Clock input from VFD_CLK (For use in synchronization of DATA 1 and 2) 6 EVdd Connected to PNL 5 V 7 EVss Connected to GND 8 NC O Output open. 9 5V_ON O

Power supply control output to Remote Control IC and SA_IC.

5V ON:HI, 5V OFF:LO 10 REMO I Remote control signal input 11 NC O Output open. 12 VFD_LATCH O Latch output to VFD driver 13 VFD_GCP O Luminance gradation control output to VFD driver 14 A13 O Address output "A13" to external ROM 15 A14 O Address output "A14" to external ROM 16 A15 O Address output "A15" to external ROM 17 VFD_BLK O Blank output to VFD driver

Display ON: High. Display OFF: Low. 18 IC/Vpp Test 19 A5 O Address output "A5" to external ROM 20 A6 O Address output "A6" to external ROM 21 A7 O Address output "A7" to external ROM 22 A8 O Address output "A8" to external ROM 23 A9 O Address output "A9" to external ROM 24 A10 O Address output "A10" to external ROM 25 A11 O Address output "A11" to external ROM 26 A12 O Address output "A12" to external ROM 27 A1 O Address output "A1" to external ROM 28 A2 O Address output "A2" to external ROM 29 A3 O Address output "A3" to external ROM 30 A4 O Address output "A4" to external ROM 31 RESET I Reset input 32 XT1 Resistor connected to GND 33 XT2 OPEN 34 REGC 1 uF connected to GND 35 X2 Connected to Main X'tal 36 X1 Connected to Main X'tal 37 Vss Connected to GND 38 Vdd Connected to PNL 5 V 39 CLKOUT OPEN 40 NC O OUTPUT OPEN 41 NC O OUTPUT OPEN

MICROCOMPUTER'S TERMINAL DESCRIPTION

KDC-Z727,Z727

MICROCOMPUTER'S TERMINAL DESCRIPTION

PinNo.

Pin name I/O Description Processing Operation

42 NC O OUTPUT OPEN 43 OE O Output Enable output to external ROM 44 CE O Chip Enable output to external ROM 45 NC O OUTPUT OPEN 46 NC O OUTPUT OPEN 47 AD0 I Data input "AD0" from external ROM 48 AD1 I Data input "AD1" from external ROM 49 AD2 I Data input "AD2" from external ROM 50 AD3 I Data input "AD3" from external ROM 51 AD4 I Data input "AD4" from external ROM 52 AD5 I Data input "AD5" from external ROM 53 AD6 I Data input "AD6" from external ROM 54 AD7 I Data input "AD7" from external ROM 55 BVdd Connected to PNL 5 V 56 BVss Connected to GND 57 AD8 I Data input "AD8" from external ROM 58 AD9 I Data input "AD9" from external ROM 59 AD10 I Data input "AD10" from external ROM 60 AD11 I Data input "AD11" from external ROM 61 AD12 I Data input "AD12" from external ROM 62 AD13 I Data input "AD13" from external ROM 63 AD14 I Data input "AD14" from external ROM 64 AD15 I Data input "AD15" from external ROM 65 A16 O Address output "A16" to external ROM 66 A17 O Address output "A17" to external ROM 67 A18 O Address output "A18" to external ROM 68 A19 O Address output "A19" to external ROM 69 NC O OUTPUT OPEN 70 A21 O Address output "A21" to external ROM 71 AVdd Connected to PNL 5 V 72 AVss Connected to GND 73 AVref 74 SA_F01 I Spectrum analyzer signal input (63Hz) 75 SA_F02 I Spectrum analyzer signal input (150Hz) 76 SA_F03 I Spectrum analyzer signal input (330Hz) 77 SA_F04 I Spectrum analyzer signal input (1KHz) 78 SA_F05 I Spectrum analyzer signal input (3.3KHz) 79 SA_F06 I Spectrum analyzer signal input (10KHz) 80 LEVEL_M I MIX signal input for level meter 81 KR5 I Key return "5" 82 KR4 I Key return "4"

KDC-Z727,Z727

MICROCOMPUTER'S TERMINAL DESCRIPTION

PinNo.

Pin name I/O Description Processing Operation

83 KR3 I Key return "3" 84 KR2 I Key return "2" 85 KR1 I Key return "1" 86 PN_SC_REQ O Send request output to Main uCOM 87 AVCONT O A/D reference voltage control output Operating: High. 88 PN_SC_CON I Operation control input from Main uCOM Operating: High. (Interrupt input) 89 NC O Output open. 90 SOURCE I SRC key input

ON: High. OFF: Low. (Interrupt input) 91 BLUE O Blue LED control output LED ON:HI, LED OFF:LO 92 PN_MC_REQ I Send request input from Main uCOM 93 KS4 O Key scan "4" 94 KS3 O Key scan "3" and Flash uCOM write port 95 KS2 O Key scan "2" and Flash uCOM write port 96 KS1 O Key scan "1" and Flash uCOM write port 97 PN_SC_DATA I Data input from Main uCOM 98 PN_MC_DATA O Data output to Main uCOM 99 PN_MC_CLK I Clock input from Main uCOM

100 NC I Resistor connected to GND

+ 22 hidden pages

Kenwood KDCZ-727, Z-727 Service manual

CONTENTS

KDC-Z727

Z727

COMPONENTS DESCRIPTION

MICROCOMPUTER'S TERMINAL DESCRIPTION