Kenwood KDC-C669 Y, KDC-C469 FM, KDC-C469 FMA, KDC-C469 Y Service Manual

CD AUTO CHANGER

KDC-C469/Y/FM/FMA KDC-C669/Y

SERVICE MANUAL

B51-7994-00 (N) 3379

The MECHANISM OPERATION is the same as model KDC-C660. Please refer to the service manual of model KDC-C660 (B51-7105-00).

Service jig

For initial position setting

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

Illustration is KDC-C469/Y.

COMPACT DISC AUTO CHANGER KDC-C469

NEW ANTI VIBRATION MECHANISM DISC NAME PRESET

DIGITAL AUDIO

COMPACT

CD-R/RW

DISC

Illustration is KDC-C669/Y.

COMPACT DISC AUTO CHANGER KDC-C669

NEW ANTI VIBRATION MECHANISM DISC NAME PRESET

DIGITAL AUDIO

COMPACT

CD-R/RW

TEXT

DISC

Illustration is

KDC-C469FM/FMA.

CORD WITH PLUG (E30-4291-05 or E30-4954-15)

BRACKET (L) (J19-5020-03)

BRACKET (R) (J19-5021-03)

SCREW SET (N99-1645-15)

COMPACT DISC AUTO CHANGER KDC-C469FM

NEW ANTI VIBRATION MECHANISM

COMPACT

CD-R/RW

DIGITAL AUDIO

MAGICTAPE ASSY (W01-0763-08) : KDC-C469FM/FMA

1BIT4D/A CONVERTER

DISC

Parts No.

W05-0635-00

REMOTO CONTROLLER ASSY (A70-2032-05) RC-504FM : KDC-C469FM/FMA (E)

HOLDER ASSY (B07-2138-08) : KDC-C469FM/FMA

BATTERY (SIZE:AAA) Not supplied as service parts

DISPLAY UNIT ASSY (T95-0247-08) : KDC-C469FM (K) (T95-0244-08) : KDC-C469FM (E) (T95-0251-08) : KDC-C469FMA (E)

COMPACT

DIGITALAUDIO

TRACK DISC

PWR

CASE (A01-2819-08) : KDC-C469FM (K) (A01-2824-08) : KDC-C469FM/FMA (E)

REP

RDM

TRAY (J99-0614-01)

HOLDER ASSY (J19-5149-02)

ANTENNA ADAPTOR (T90-0521-05) : KDC-C469FM/FMA (E)

ANTENNA ADAPTOR (T90-0512-05) : KDC-C469FM/FMA (E)

SW5V

LIM SW

L.P.S.

EJ SW

ARM SW

12.5MHz

SPINDLE/LO-EJ

SLED

LOE SW

TR COIL

FO COIL

BTL

EEPROM

&TEXT DECODER

APC

SA5V

S8V

SYSTEM u-COM

IC7

IC1

RF AMP&SARVO DSP

16.93MHz

P-ON

Q10

Q15,16

Q20

BU. DET

IC8

IC5

MG SW

8V AVR

S8V

S-RAM

BU14V

CH RST

AUDIO OUT

5VREG

IC4

DA5V

S8V

HOT

IC9

RESET

7V/9V

Q21,22

M5V1

M5V2

SW5V

&DC MOTOR

DRIVER

ELEVATOR

AVR

SA5V

&D/A CONVERTER &SCF

MUTE

0bit

Q6,7

MUTE

Q4,5,8

SD5V

M5V2

AVR

CH-MUTE

CH-CON

5L I/F

IC11

COMM SW

to HEAD UNIT

ASSY (X13)

(X32)

(X13)

(X92)

PICKUP

KDC-C469/Y/FM/FMA

KDC-C669/Y

BLOCK DIAGRAM

KDC-C469/Y/FM/FMA

KDC-C669/Y

ACC

BATT

GND

CN103

KEY MATRIX

CN1

IC1

AVR (+5V)

CN101

Q1,6

ACC DETECTION

IC1

2,50-56

LCD DRIVER

19-22,32,66

RESET DRIVER

6-43

Q4,5

LCD1

VDD

IC2

REMOTE SENSER

IC2

HOLD

VDD

P ON PLL

19-22,32,66

u-COM

12-17 26 61

29,30,60

74,77

CD-CH

13P

CN102

SIGNAL

(L/R)

+V(RF STAGE)

+V(AUDIO)

IC101

ISOLATION AMP. L.P.F.

2nd.

Q308

MODE 1,2

IC102

IC4

AVR(+5.6V)

EMPHASIS

Q101,201

CH-CONTROL

ALC DRIVER

IC301

FM-St. MODULATOR

IC302

ALC DETECTION

AMP

RIPPLE FILTER

MPX

Q310

MODE 1,2

Q306,

PILOT MIX

307

Q304,305 LEVEL CONTROL Q309 AUDIO MUTE

RF STAGE

RL1

CN104

ANT IN

CN105

RADIO

KDC-C469/Y/FM/FMA KDC-C669/Y

COMPONENT DESCRIPTION

● CD PLAYER UNIT (X32-5470-0x)

Ref. No.

IC11 LC3564BT-70 S RAM CD-TEXT data memory.

Q10 2SB1295 P-ON 5V SW

Q11 DTC124EK Reset SW When System Reset has activated, a base goes “Hi”, and Q11 is turned on.

Q13 DTC124EUA CH CON SW

Q14 DTA143EUA CH MUTE SW

Q16 2SC4081 SRV 8V AVR Q16 is combined with Q15 (X92-), and works as a pre-driver of AVR.

Q17 DTA143EK

Q18 DTC124EUA

Q19 DTC124EUA 7/9V SW

Q20 DTC124EK BU DETECTION SW

Q21 2SB1202

Q22 2SC4081 Q21 and Q22 are inverted Darlington connection.

Component Name Application/Function Operation/Condition/Compatibility

IC1 UPD63711AGC Servo IC

IC4 KIA78L05F +5V AVR Analogue output circuit power supply for D/A converter.

IC5 LA6576 Motor driver 1. Input selection.

IC7 UPD784214GC098 Mechanism MI-COM. Mechanism and servo control.

IC8 BR24C02F-W EEPROM LPS data back-up memory.

IC9 S-80830CNNP Reset IC When BU 5V voltage is less than 3.0V, IC outputs “Lo”.

Q1 MCH6101 APC Laser diode auto power control.

Q4 DTA124EK 0 bit mute (L CH.) When 0 bit mute is activated, an emitter goes “Hi”, and Q4 outputs “Hi”.

Q5 DTA124EUA 0 bit mute (R CH.) When 0 bit mute is activated, an emitter goes “Hi”, and Q5 outputs “Hi”.

Q6 DTC343TK Mute SW (L CH.)

Q7 DTC343TK Mute SW (R CH.)

Q8 DTA124EK A mute drive

Q9 2SB1202 Servo 5V AVR Q9 is combined with IC5’s pin 26 and 27 , and works as a driver of AVR.

SRV 8V AVR SW When Q18's base goes “Hi”, Q17 is turned on, and SVR 8V AVR is working.

BU 5V AVR

RF amplifier built in digital servo and data processor IC. Focusing, tracking, sled

and spindle servo processing. Detection of dropout, anti-shock, track crossing and

off-track conditions.

Automatic adjustment (focusing, tracking, gain, offset and balance) operations.

Digital signal processing (DSP, PLL, sub-codes, CD-TEXT decode, CIRC error

correction, audio data interpolaration) operations.

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

VO1~VO4 and VOL outputs ON/OFF function.

While MUTE1 goes “Hi”, VO1 outputs are turned on.

While MUTE2 goes “Hi”, VO2~VO4 and VOL outputs are turned on.

VIN1 amplifier function (input selection and VREF selection)

While VIN SW terminal goes “Lo”, IC pin 15, 16 and 17 inputs are selected.

While VIN SW terminal goes “Hi”, IC pin 15, 18 and 19 inputs are selected.

2. VREF selection.

While VIN SW terminal goes “Lo”, internal VREF (2.5V typical) is selected.

While VIN SW terminal goes “Hi”, external VREF (IC pin 30 input) is selected.

When 0 bit mute or A mute drive is activated, a base goes “Hi”, and L channel audio

signal is muted.

When 0 bit mute or A mute drive is activated, a base goes “Hi”, and R channel audio

signal is muted.

When audio mute of IC7 is activated, a base goes “Lo”, and audio mute drive signal

is outputted.

While base goes “Lo”, P-ON 5V is supplied to the microprocessor peripheral circuits.

While CH CON or CH-CON2 mode is selected, a base goes “Hi”, and Q13 is turned on.

When MUTE REQUEST to H/U is outputted, a base goes “Lo”, and Q14 is turned on.

When a base goes “Hi”, Q19 is turned on, and SVR 8V AVR is outputting +7V.

When a base goes “Lo”, Q19 is turned off, and SVR 8V AVR is outputting +8.5V.

While BACKUP is applied, a base goes “Hi”, and Q20 is turned on.

When momentary power down has detected, a base goes “Lo”, and Q20 is turned off.

While BACKUP is applied, AVR outputs +5V.

KDC-C469/Y/FM/FMA

COMPONENT DESCRIPTION

KDC-C669/Y

Ref. No.

Component Name Application/Function Operation/Condition/Compatibility

Q30 DTC114YUA Eccentric disc SW

Q31 DTC124EUA VIN SW

When an eccentric disc is detected, Q30 is turned on, and a preceding beam is

made to be delayed.

While spindle servo or disc loading/eject mode is selected, a base goes “Hi”, and

Q31 is turned on.

● RF MODULATOR UNIT

Ref. No.

IC101 NJM2060M Isolation amp.

IC102 NJM4565MD Low pass filter

IC301 BA1405F FM ST modulator

IC302 NJM4565MD

Q101 2SK2158

Q201 2SK2158

Q303 2SA1162(GR) Pilot mix amp.

Q304 2SK2158 Level control SW Level 1/2 : OFF, Level 3/4 : ON

Q305 2SK2158 Level control SW Level 2/4 : OFF, Level 1/3 : ON

Q306 2SK508L RF oscillator buffer

Q307 2SC2714(Y) RF amp.

Q308 2SK2158 Mode (1/2) SW Mode 1 : ON, Mode 2 : OFF

Q309 2SK2158 Audio mute POWER ON mode : OFF, POWER OFF mode : ON

Q310 2SK2158 Mode (1/2) SW Mode 1 : OFF, Mode 2 : ON

Component Name Application/Function Operation/Condition/Compatibility

IC1 UPC7805AHF BU 5V AVR While BACKUP is applied, AVR outputs +5V.

IC2 LC72329-9B24 System MI-COM. System control.

IC4 NJM78L05UA 5V AVR Power supply for FM modulator and RF amplifier.

1/2 VCC driver,

ALC detection amp.

Q1 DTC124EK ACC detection When Q4 is turned on, Q1 is turned on during ACC applied.

Q2 2SA1782(T,U)

Q3 DTC124EK

Q4 DTC143TK Reset SW

Q5 DTC143TK CH RESET SW

Q6 DTA124EK Hold detection SW

Q8 DTC143TK Relay driver

Q9 2SC4640(T,U) Ripple filter Power supply for RF amplifier

POWER SW When Q3’s base goes “Hi”, Q2 is turned on, and RF modulator circuit is working.

When RESET SW on display unit is pressed, Q4, Q1 and Q6 are turned off, and

IC2 is holding.

When RESET SW on display unit is pressed, Q5 is turned off, and SYSTEM

RESET signal is outputted to CD changer.

When RESET SW on display unit is pressed or ACC is OFF, Q6 is turned off, and

IC2 is holding.

FM modulator output / Vehicles antenna input switching.

When a base goes “Hi”, FM modulator output is selected.

ALC control SW

● DISPLAY UNIT

Ref. No.

Component Name Application/Function Operation/Condition/Compatibility

IC1 LC75852W

IC2 PNA4602M

Q1 DTC144EK

Q2 DTB123YK

Q3 DTA144EK

Q4 DTC144EK

Q5 DTA144EK sensor.

LCD driver with key-matrix

Remote control light senser

LED ON/OFF SW When Q1’s base goes “Hi”, Q2 is turned on, and LED is turned on.

Key-matrix permition SW

IC2 ON/OFF SW

Ready on key-matrix

When Q4’s base goes “Hi”, Q5 is turned on, and 5V is supplied to remote control

KDC-C469/Y/FM/FMA KDC-C669/Y

MICROCOMPUTER’S TERMINAL DESCRIPTION

● Mechanism Microcomputer : UPD784214GC098 (X32- : IC7)

Pin No. Pin Name I/O Description Processing Operation

1 NOR/RW O CD-DA/CD-RW Switching Not used (N.C.)

2 TSTB O CD-TEXT parameter strobe

3 P-CON O P-CON output Not used (N.C.)

4 FOK I Focus OK input “Hi” : Focus OK

5XTALEN O Servo IC oscillation stop control “Hi” : Oscillation stop

6 RST O Servo IC reset terminal “Lo” : Reset

7SAO O Servo IC command/parameter setting terminal

8 SSTB O

9 VDD - Positive power supply connection terminal Connected to D 5V lines

10 X2 - Main clock resonator connection terminal 2

11 X1 I Main clock resonator connection terminal 1

12 VSS - Ground connection terminal Connected to GND lines

13 XT2 - Sub clock resonator connection terminal 2 Not used (N.C.)

14 XT1 I Sub clock resonator connection terminal 1 Not used (connected to GND lines)

15 RESET I System reset input “Lo” : System reset

16 FOGUP I Vibration detect input “Hi” : Vibration detect

17 MGSW I Magazine switch input “Hi” : Magazine in

18 EJSW I Eject switch input “Hi” : Eject switch ON

19 COMMSW I 5-line communication old/new switch input “Hi” : New communication, “Lo” : Old communication

20 PACK I Text data pack synchronous signal input “Hi”→“Lo” : The head of the pack data

21 CH-CON I Changer control input “Hi” : Standby mode, “Lo” : Operation mode

22 BUDET I Momentary power down detection input

23 AVDD -

24 AVREF0 I A/D converter reference voltage input Connected to PON 5V lines

25 HOT I Rise in temperature detection input

26 LPS I LPS Mechanical deck position detection input

27 LOESW I Loading complete switch input “Lo” : Loading complete

28 LIMSW I Limit switch input “Lo” : Pickup most inner position

29 TOFF I Tracking OFF mode terminal Not used (pull down to GND lines)

30 ADJSEL I Servo automatic adjustment ON/OFF terminal Not used (pull down to GND lines)

31 TBANK I Tracking gain switching mode terminal Not used (pull down to GND lines)

32 SIM2 I Destination input 2 Not used (pull down to GND lines)

33 AVSS - A/D, D/A converter ground connection terminal Connected to GND lines

34 LPSCO O LPS A/D converter reference power control output Not used (N.C.)

35 AMUTE O Audio mute output “Lo” : Audio mute ON

36 AVREF1 I D/A converter reference voltage input Connected to D 5V lines

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/output with H/U

43 RECQC O Communication request to H/U “Lo” : Communication requested

44 CHMUTE O Audio mute request to H/U “Lo” : Audio mute requested

Servo IC command/parameter setting strobe terminal

A/D converter positive power supply connection terminal

“Hi” : Parameter setting, “Lo” : Address resister setting

“Hi”→“Lo” : Serial data latch

“Hi” : When momentary power down detected or

BU OFF “Lo” : BU ON

Connected to D 5V lines

KDC-C469/Y/FM/FMA

KDC-C669/Y

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description Processing Operation

45 TSI I Text data input from servo IC

46 TSO O Text data output to servo IC

47 TSCK O Text data clock to servo IC

48~55 A0~A7 O Address setting terminal for S RAM

56~63 D0~D7 I/O Data input/output terminal with S RAM

64~68 A8~A12 O Address setting terminal for S RAM

69~71 A13~A15 O Chip enable setting terminal for S RAM Not used (pull down to GND lines)

72 VSS - Ground connection terminal Connected to GND lines

73 A16 O Chip enable setting terminal for S RAM Not used (pull down to GND lines)

74 A17 O Chip enable setting terminal for S RAM

75 RAMOK O Pickup check judging terminal for production Not used (N.C.)

76 ELVADJ I Mechanism deck ascent/descent position terminal Not used (pull up to D 5V lines)

77 RD O Read-out to S RAM control output

78 WR O Write to S RAM control output

79 WAIT I Waiting time insertion input when accessing S RAM Not used (pull down to GND lines)

80 ASTB O Chip selection to S RAM Not used (N.C.)

81 VDD - Positive power supply connection terminal Connected to D 5V lines

82 PUSEL I Pickup type select terminal Pull up to D 5V lines

83 REQH I Communication request from H/U “Lo” : Communication requested

84 SPLO+ O Spindle/Loading control terminal

85 SPLO- O Spindle/Loading control terminal

86 ELV+ O Mechanism deck ascent/descent terminal

87 ELV- O Mechanism deck ascent/descent terminal

88 SIM1 I Destination input 1

89 SEARCH O Search mode output Not used (N.C.)

90 TEST1 I Test mode terminal 1 for test mode Not used (pull down to GND lines)

91 TEST2 I Test mode terminal 2 for test mode Not used (pull down to GND lines)

92 8/7V O Motor driver IC power voltage control output “Hi” : 7V, “Lo” : 8.5V

93 EEPWR I EEPROM write mode terminal for production Not used (pull down to GND lines)

94 TEST/VPP I Flash ROM program mode terminal Not used (connected to GND lines)

95 SRVSEL I

96 SLNSA I Sled non-sensitive area ON/OFF terminal Not used (pull down to GND lines)

97 SDA I/O Data input/output with EEPROM

98 SCL O Clock output to EEPROM

99 PON O PON output “Lo” : AVR & LPS POWER ON

100 ARMSW I Arm switch input “Hi” : Arm switch ON

Servo active mode terminal (no mechanism movement)

“Lo” : adapted for CD-TEXT, “Hi” : not adapted for CD-TEXT

Not used (pull down to GND lines)

● System Microcomputer : LC72329-9B24 (RF Modulator Unit : IC2)

Pin No. Pin Name I/O Description Processing Operation

1 XIN I Main clock resonator connection terminal

2 TEST2 I Test mode terminal 2 for test mode Not used (pull down to GND lines)

3, 4 PG3, PG2 I Not used (pull down to GND lines)

5 PG1 I Not used (pull up to +5V lines)

6 PG0 I Not used (pull down to GND lines)

7~9 PH3~PH1 O Not used (pull down to GND lines)

10 PH0 MUTE1 O Not used (N.C.)

KDC-C469/Y/FM/FMA KDC-C669/Y

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Description Processing Operation

11 PF3 MUTE0 O Not used (N.C.)

12 PF2 REQC I Communication request input form CH “Lo” : Communication requested

13 PF1 REQH O Communication request output to CH “Lo” : Communication requested

14 PF0 CHCON O Control output to CH “Hi” : Operation mode, “Lo” : Standby mode

15 PE3 DATA IN I Data input from CH

17 PE1 SCK O Clock output to CH

18 PE0 O Not used (N.C.)

20 PD2 CLK O Clock output to LCD

21 PD1 RST O Reset output to LCD “Lo” : Reset

22 PD0 CE O CE output to LCD

23~25 PC3~PC1 Not used (N.C.)

26 PC0 SEPA O Separation select output “Hi” : Mode 1, “Lo” : Mode 2

27, 28 PB3, PB2 O Not used (N.C.)

29 PB1 GAIN1 O GAIN1 output “Hi” : Level 1/3, “Lo” : Level 2/4

30 PB0 GAIN2 O GAIN2 output “Hi” : Level 3/4, “Lo” : Level 1/2

31 VDD +5V - Positive power supply connection terminal Connected to +5V lines.

32 PA3 DATA IN I Data input from LCD

33~35 PA2~PA0 I Not used (connected to GND lines)

36 PI31 S28 O Not used (N.C.)

37 PI21 S27 O Not used (N.C.)

38 PI11 S26 O Not used (N.C.)

39 PI01 S25 O Not used (N.C.)

40~58 S24~S6 O Not used (N.C.)

59 ALC LOW S5 O Not used (N.C.)

60 MUTE S4 O Mute output “Hi” : POWER OFF mode, “Lo” : POWER ON mode

61 SEP ATT S3 O Separation attenuator output “Hi” : Mode 2, “Lo” : Mode 1

62 RELAY S2 O Relay SW control

63 P ON S1 O P ON output “Hi” : RF modulator circuit is active

64,65 COM2, COM1 O Not used (N.C.)

66 REMO INT I Remote control sensor input

67 HOLD I Hold input “Lo” : Microprocessor stop

68 RES I Not used (pull up to +5V lines)

69 AOI I Not used (pull down to GND lines)

70 HCTR I Not used (pull down to GND lines)

71 LCTR I Not used (pull down to GND lines)

72 SNS I Not used (pull down to GND lines)

73 VDD - Positive power supply connection terminal Connected to +5V lines

74 FMIN I FM input

75 AMIN I AM input Not used (pull down to GND lines)

76 VSS - Ground connection terminal Connected to GND lines

77 EO1 O FM frequency control output

78 EO2 O Not used (N.C.)

79 TEST1 I Test mode terminal 1 for test mode Not used (pull down to GND lines)

80 XOUT - Main clock resonator connection terminal

PE2 DATA OUT

PD3 DATA OUT

O Data output to CH

O Data output to LCD

“Hi” : RF modular output, “Lo” : Vehicle antenna output

W05-0635-00

ADJUSTMENT

KDC-C469/Y/FM/FMA

KDC-C669/Y

● RF MODULATOR UNIT

1. DC balance adjustment (VR301)

While observing the waveform with an oscilloscope at pin

13 of IC301, adjust VR301 to minimize the waveform level.

2. PLL control voltage adjustment (VC301)

First set the transmission frequency to *87.9MHz with the

commander, then adjust VC301 so that the DC Voltage at

the + pole of C317, measured using a multi-meter or digital

tester, is +3V±0.1V).

* NOTE : E type is 87.7MHz.

3. Modulation level adjustment (VR303)

The method uses a standard receiver or tuner.

Adjust VR303 so that the output level from the standard

receiver or tuner is as specified.

● 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 by press-

ing 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 deck

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 adjust-

ment completes. (The data is written in the EEPROM at

this time.)

● Caution : Note on IC8 (EEPROM)

Be sure to use the W05-0869-00 when replacing the

EEPROM. IC8 stores the digital servo data of the pickup

servo.

Therefore, if the EEPROM does not store servo data, ER-

ROR76 (E-76) will indicate the H/U’s display section at the

moment CD is played.

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