Kenwood KD-CC-719 Service Manual

CD AUTO CHANGER

KDC-C719/C719Y KDC-C719/G4

SERVICE MANUAL

REVISED

Model

KDC-C719 (E type) KDC-C719 (K,M type) KDC-C719/G4 (M type)

Serial Number

U0400251~ 60400351~ 67400651~

Cord with plug (E30-4291-15)

Service jig

For initial position setting

When transporting these models, always attach CAUTION CARD and STEPPED SCREW (for transportation).

COMPACT DISC AUTO CHANGER KDC-C719

NEW ANTI VIBRATION MECHANISM DISC NAME PRESET

COMPACT

CD-R/RW

DIGITAL AUDIO

Tray (J99-0614-01)

TEXT

Holder assy (J19-5146-02)

DISC

10

Parts No.

W05-0635-00

5m

Bracket (L) (J19-5018-03)

Products for European market comply with the

Bracket (R) (J19-5019-03)

RoHS

Directive.

Screw set (N99-1784-05)

This product uses Lead Free solder.

KDC-C719/C719Y KDC-C719/G4

(X92)

PICKUP ASSY (X16-339)

PD

C

DA

B

EF

FO COIL

TR COIL

SPINDLE

M

SLED

M

LOE SW

LIM SW

ELEVATOR

M

(X32)

7

Q1

SD5V 8

BLOCK DIAGRAM

IC1

X1

16.93MHz

HOT

SYSTEM u-COM

12.5MHz

L.P.S.

APC

SA5V

IC5

BTL & DC MOTOR DRIVER

IC8

MG SW

ARM SW

EJ SW

RF AMP & SERVO DSP & TEXT DECODER & D/A CONVERTER & SCF

S8V

Q9

SA5V AVR

E2PROM

S1

S3

S2

4

5

2

13

S8V

Q6-8

M5V1

IC4

5VREG

MUTE

IC7

M5V2

7V/8V

M5V1

5

IC9

RESET

Q20

BU. DET

Q21,22

5V AVR

Q10 Q15,16

P-ON

8V AVR

S8V

3

AUDIO OUT

5L I/F CH-CON CH-MUTE

CH-RST

BU14V

to X16-338

DA5V

2 Q4,5

0bit MUTE

X2

Q12

AVREF0

2

KDC-C719/C719Y KDC-C719/G4

COMPONENTS DESCRIPTION

● CD PLAYER UNIT (X32-5810-00)

Ref. No. Application / Function Operation / Condition / Compatibility

IC1 DSP Servo control IC4 A5V regulator Power supply for 5V audio IC5 Driver Driving spindle motor, loading/eject operation, elevation operation, driving pick-up ACT IC7 µ-com Servo control, LX_BUS communication control IC8 Memory IC ELV operation parameter, Store servo coefficient IC9 Reset IC Q1 Current AMP Adjust the current to be applied to the laser Q4~8 AMUTE SW AMUTE Q9 SW SA5V Q10 PON SW PON Q11 CH RESET SW CH RESET Q13 CH control SW Q14 CH MUTE SW CH MUTE Q16 SW8V Q17,18 8V SW Q19 8V/7V SW 8V/7V switching Q20 BU5V detection SW BU5V detection Q21,22 BU5V Supply power to IC7 Q30 Anti-scratch measure Q31 SW Switching loading, eject, and spindle

MICROCOMPUTER’S TERMINAL DESCRIPTION

● SYSTEM MICROCOMPUTER: 784214YGC132A/784217YGC106A (X32: IC7)

Pin No. Pin Name I/O Application

1 NOR/RW O Disc detection result 2 /TSTB O TEXT data strobe signal 3 P_CON O Power supply control signal for video CH 4 FOK I Focus-ON status signal input 5 /XTALEN O Servo IC oscillation stop signal 6 RST O Servo IC reset terminal 7 SA0 O Servo IC communication address setting 8 SSTB O Servo IC communication strobe 9 VDD Positive power supply voltage connection terminal 10 X2 Oscillator connection terminal 2 11 X1 I Oscillator connection terminal 1 12 VSS GND electric potential connection 13 XT2 Sub clock connection terminal 2 14 XT1 I Sub clock connection terminal 1

3

KDC-C719/C719Y KDC-C719/G4

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Application

15 RESET I Reset 16 FOGUP I Focus gain up terminal 17 MGSW I Magazine switch 18 EJSW I Eject switch 19 COMMSW I 5 line communication new/old switch 20 PACK I TEXT data PACK synch signal 21 CHCON I Changer control input from H/U 22 BUDET I BU power supply detection terminal 23 AVDD A/D converter analog power supply terminal 24 AVREF0 I A/D converter reference voltage input 25 HOT I Temperature rise detection 26 LPS I MD deck up/down position detection 27 LOESW I Loading completion switch 28 LIMSW I Limit switch 29 TOFF I Tracking off mode 30 ADJSEL I Servo auto-adjustment ON/OFF 31 TBANK I Tracking bank switching terminal 32 SIM2 I Model detection terminal 33 AVSS A/D converter standard GND terminal 34 LPSCO O A/D converter reference power supply control 35 AMUTE O Audio mute 36 AVREF1 D/A converter reference power supply 37 SDI I Servo IC communication serial data input 38 SDO O Servo IC communication serial data output 39 SCK O Servo IC communication serial clock output 40 DATAH I Data input from H/U 41 DATAC O Data output from the changer 42 HCLK I/O Communication clock input from H/U 43 REQC O Request of communication with H/U 44 CHMUTE O Audio mute output to H/U 45 TSI I TEXT data input 46 TSO O TEXT data output 47 /TSCK O TEXT clock output 48~71 NC O Not used 72 VSS GND electric potential connection terminal 73,74 NC O Not used 75 PUOK O Pick-up type detection terminal (for production) 76 ELVADJ I MD deck up/down position adjustment mode 77~80 NC O Not used 81 VDD Positive power supply voltage connection terminal 82 PUSEL I Pick-up type detection 83 REQH I Request of communication from H/U 84 SP/LO+ O Spindle/loading control terminal +

4

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Application

85 SP/LO- O Spindle/loading control terminal 86 ELV+ O MD up/down control terminal + 87 ELV- O MD up/down control terminal 88 SIM1 I Standard stack CH destination port 89 SEARCH O Search/play switching port 90 TEST1 I Mechanism duration mode 91 TEST2 I Mechanism duration mode 92 8V/7V O Driver IC for mechanism operation power supply voltage control 93 EEPWR I EEPROM writing mode 94 TEST/VPP I Flash ROM program mode 95 SRVSEL I Servo operation mode (no mechanism operation) 96 SLNSA I Sled blind zone ON/OFF terminal 97 SDA I/O EEPROM data input/output 98 SCL O EEPROM clock output 99 PON O PON output 100 ARMSW I Arm switch

KDC-C719/C719Y KDC-C719/G4

ADJUSTMENT

● L.P.S. initial position adjustment procedure

1. Connect the changer to the HEAD UNIT (H/U).

2. While holding the magazine eject button of the changer, press the reset button of the H/U.

3. After about 3 seconds, release the magazine eject button.

4. Press the SRC button of the H/U to enter the CD-CH mode, and the H/U's display section indicates “E-88”.

5. Move the mechanism deck to around the 1st stage b y pressing the DISC- or DISC+ button.

6. Insert the adjustment tool (W05-0635-00) into the tool hole on the changer mechanism.

7. Then press the DISC+ button to move the mechanism dec k until the mechanism's slider hits the adjustment tool.

8. When the motor locks (stops), press the REPEAT key of the H/U. When the REPEAT key is pressed, the mechanism moves automatically to the 1st stage and the initial position adjustment completes. (The data is written in the EEPROM at this time.)

W05-0635-00

● Caution : Note on IC8 (EEPROM)

Be sure to use the W05-1306-00 when replacing the EEPROM. IC8 stores the digital ser vo data of the pickup servo. Therefore, if the EEPROM does not store servo data, ERROR76 (E-76) will indicate the H/U’ s display section at the moment CD is played.

5

A B C D E

KDC-C719/C719Y KDC-C719/G4

1

PC BOARD (COMPONENT SIDE VIEW)

CD PLAYER UNIT X32-5810-00 (J76-0139-11)

F+

T+

T-

F-

SP-

SP+

SL-

SL+

D24

SPLO-

R123 R122

/TSCK

R105

RMK

119

R162

C71

TSO

AVR0 LPS

TSI

GND

SI

50 26

51

IC7

75

76 100

SRVSEL VPP

TS2

(ELV+)

SIM1

EEP

TS1

SRH

(ELV-)

R856

R854

R857

R855

D7

C61

R77

D11

D3

R102

D12

SGND

(QH)

CP3

TBANK

R505

SLNSA

ELV-

ELV+

8/7V

D15

TOFF

SCL

SDA

R502

ADJSEL

C70

25

1

PON

GND

AM

(DH)

NC

QH

HOT

16

QC

Q8

X1

N/RW

/TSTB

Q18

CCLK

EB

CRST

PACK

BE

DC

R99

CON

R506

DH

D21

D22

X2

VDD

Q17

CN1

L-CH

R78

R54

R-CH

R53

GND

B14V

LIMSW

ROUT

LOUT

Q16

BE

8V

23

LOESW

R73

R72

D16

/RST

RFOK

A0

/STB

S

/SCK

C15

X1

C17

EMPH

SD5V

D9

D10

SI

C16

26

FLAG

ARMSW

E

TX

F

HOLD

VC

IOP-

LD

PD

IOP+

R7

PN

1

IC1

502551

Q21

EBEB

Q22

BASE

D8

CN2

R

L

(CM)

C52

RST R507

C68

CCON

IGO

IC4

R97

C69

5V

AGND

EB EB

R106

2

C72

CRST

Q6

Q7

EB

1 43

B14V

AMUTE

AGND

DAVDD

R206

Q11

R96

IC9

AVDD

C63

R79

GND

CM

EB

2

R69

IC5

20 38 1

R68

R70

R67

D23

COMMSW

BE

Q31

3

BDET

R76

EJSW

EB

4

Q20

SPLO+

R127

PSL

ELVADJ

R133

5

R5

(LD)

C1D2

100

1

C2D1

A B

C2D3

PLCK

C3

TE2

C4

LOCK

C5

C D

TE0

C2D2

(E)

C1D1

VR

R11 R12 R13 R14

FE0

R59 C6

MIRR

R4

(F)

76

75

ATEST

RFCK

(A)

(C)

C9

DAC3

DAC1

(B) (D)

C7

RF0

C10

DAC2

R87

C11

DAC0

TSTB

PACK

R84

R16

TSI

SA5V

C8

C19

AGC

EFM

R851

GND

ASY MD SD

TD

FD

/TSCK

TS

MGSW

C851

6

X32-5810-00

Ref. No. Address

IC1 3D IC4 3C IC5 2B IC7 4B IC9 4C

Q6 3C

Ref. No. Address

Q7 3C

Q8 3C Q11 4C Q16 5D Q17 5C Q18 5C

Ref. No. Address

Q20 4A Q21 5D Q22 5D Q31 3A

7

Refer to the schematic diagram for the values of resistors and capacitors.

6