Kenwood KDC-8021, KDC-M9021, KDC-X859 Service Manual

PREOUT

TEXT

COMPACT

DIGITAL AUDIO

PTY/D.REP

TIRDS

LOUD

STATTSQIN

F.SEL

RDM

P.M/M.RDM

READY

SIRIUS

AUTO

SCN

50Wx4

SRC

DAB

1/5

2/6

3/7

4/8

REP MENU

AUD

OFF

ANG

SCRL

KDC-X859

PREOUT

TEXT

COMPACT

DIGITAL AUDIO

PTY/D.REP

TIRDS

LOUD

STATTP/SIN

F.SEL

RDM

P.M/M.RDM

SCN

50Wx4

SRC

DAB

1/5

2/6

3/7 4/8

REP MENU

AUD

OFF

ANG

SCRL

KDC-M9021

GSM

TEXT

COMPACT

DIGITAL AUDIO

PTY/D.REP

TIRDS

LOUD

STATTP/SIN

RDM

P.M/M.RDM

SCN

50Wx4

SRC

DAB

1/5

2/6

3/7

4/8

REP MENU

AUD

OFF

ANG

SCRL

KDC-8021

GSM

KDC-8021/M9021/X859

CD RECEIVER

SERVICE MANUAL

2002-2 PRINTED IN KOREA

B51-7901-00 (K) 3169

The CD mechanism information is not in this service manual. Please, refer to service manual. KDC-M9021/X859 : X92-4460-0x(B51-7891-00) KDC-8021 : X92-4450-01(B51-7889-00)

Panel assy (A64-2567-02)

KDC-X859

Panel assy (A64-2588-02)

Panel assy (A64-2587-02)

KDC-M9021

KDC-8021

Escutcheon assy (B07-3007-03)

DC cord (E30-4939-05)

DC cord (E30-4956-05)

Plastic cabinet assy (A02-1497-13)

Remote con.assy (A70-)

Antenna adaptor (T90-0523-05)

Escutcheon (B07-3010-02)

Mounting hardware assy (J21-9716-03)

Lever (D10-4562-04)

Bracket (L) (J19-5051-03)

Torsion coil spring (G01-2924-04)

Screw set (N99-1722-05)

Screw set (N99-1704-05)

∗

Remote con.assy (A70-0886-15)

∗

Bracket (R) (J19-5052-03)

∗

Depends on model. Refer to the parts list.

∗

ILL

TEL MUTE

ACC

ANT CON

P CON

BACK UP

EXT AMP CONT

PLL+B

BUFFER

DECODER

RDS

E-VOL

MPX

N.C.

IF+B

SYSTEM u-COM

RESET SW

A8V SW14V

EXT AMP CONT

DIMMER

ACC DET

TEL MUTE

P CON

B.U DET

ANT CON

SW5V B.U. 5V

PAN5V

MASK MECHA

POWER IC

THERMO PROTECT

IC4

MUTE

PRE AMP

4.5V

IC11-13

SP OUT

PRE OUT

RESET

AM+B

FM+B

NOISE BUFFER

SPEANA AGC OP AMP

SYSTEM E'S+

MUTE DRIVER

IC9

4.5V

SERVO AVR

DC/DC

4.5V PRE

IC15

DRIVER

MASK

REMO

O-CE

O-CLK

O-DATA

STEERING REMOTE

EXTERNAL DISPLAY

DC/DC REG

CD4.7V

DC/DC

IC7

MATRIX

KEY

REMO

FL3.3V SW

VFD (GRADATED)

SPEANA BPF

G/R SW

PANEL u-COM

FL+B SW

VFD (GRADATED)

MATRIX

KEY

RESET SW

FL3.3V SW

REMO

ROM

FL+B SW

PANEL u-COM

SPEANA BPF

G/R SW

IC10

IC14

IC2

CONTROL

1.8V PRE OUT

PRE OUT OUTPUT VOLTAGE

IC1

IC5

IC8

251mV (E) TYPE

470mV (K) TYPE

FM:

AM: 230mV

F/E

(X16-160)FL (2 COLOR) TYPE (X16-161)

FL (GRADATED) TYPE (X16-158)

(X16-159)

AUDIO

S-METER

IFC OUT

PLL DATA

PLL CLK

SW5V

FM AM

CD CHANGER

S METER

QUAL

SDA

SCK

S MUTE

A 8V

MASK SW1

RCLK QUAL RDATA

NOISE S METER AFS

IFC OUT PLL DATA PLL CLK

SW1

M RST

LO/EJ MO SW

MUTE R

MUTE L

M STOP

SW3

DATA C

CH RST CH MUTE

SW2

DATA H CH CON

CH CLK REQ H REQ C

MASK DET

RESET

AM+B

FM+B

SCK

SDA

PRE MUTE

MUTE

BEEP

P MUTE

ACC DET

PHONE

DIMMER

EXT AMP CONT

P CON

PAN5V

P ON

ANT CONT

B.U. DET

SW5V

CH MUTE

CH RST

DATA H

DATA C

CH CON

REQ C

CH CLK

REQ H

BACK UP

1200mV

CD4.7V

SERVO +B

A8V

PAN5 V

B.U. 5VSW5V

MUTE

AC GND

BACK UP

SW5V

B.U.5V

4500mVCD

AM 750mV

2250mV

1069mV

1715mV

(K) TYPE (E) TYPE

4500mV

B.U. 5V

SW5V

SCK

SDA

B.U. 5V

-B

SERVO+B

-B

MASK SW2

MASK SW3

O-CE

REMO

O-D ATA

O-CLK

MASK +

MASK -

CD-MECHA+B

ILL ON

CD4.7V

PANEL 5V

VDD1 VDD2

FAC

PANEL 5V

VDD1 VDD2

FAC

AFS

MS CLK

MS D ATA

M STOP

M RST MUTE L MUTE R

MO SW

LO/EJ

SW1 SW2 SW3

A8V

B.U. 5V

(MP3. WMA)

3600mV 1372mV

855mV

(E) TYPE

4.5V PRE 1.8V PRE

MODE

4500mV 4500mV 3600mV

1200mV

KDC-8021/M9021/X859

BLOCK DIAGRAM

KDC-8021/M9021/X859

COMPONENT DESCRIPTION

ELECTRIC UNIT (X25-91xx-xx)

Element Purpose & Function Operation, Condition, Compatibility

IC1 System uCOM IC2 E.Vol & N.C. MPX IC3 Power Supply IC Error detection in combination with Q8. Audio 8 V AVR drive. IC4 POWER IC 50Wx4ch IC5 HPF & LPF & NON-FAD SW IC6 CD mechanism 4.7 V power SW-Reg. IC7 4.5 V PRE-OUT DC/DC

IC8 RESET IC

IC9 Muting logic IC 4 inputs. NOR gate x 4. IC10 Spectrum analyzer opamp IC11 4.5 V PRE-OUT opamp Front output. IC12 4.5 V PRE-OUT opamp Rear output IC13 4.5 V PRE-OUT opamp Non-Fad. output IC14 RDS decoder IC15 Motor Dr. IC For storage mechanism IC16 E2PROM Q1,2 BU 5V AVR Darlington connected.

Q3 SW 5V ON when the base is "L". Q4,5 SW 14V Turns Q7 ON when the base of Q5 is "H". Q6,7 AUDIO 8V AVR ON/OFF SW 8 V ON/OFF SW. Q7 turns ON when the base of Q6 is "H".

Q8 AUDIO 8V AVR

Q9 Servo power AVR

Q10 CD 4.7V SW-Reg ON/OFF SW CD 4.7 V SW-Reg ON/OFF SW. ON when the base is "H".

Q11,12 FL & ILLUM AVR ON/OFF SW

Q13,14 FL & ILLUM AVR ON/OFF SW Q15,16 4.5 V PRE-OUT DC/DC converter AVR Darlington connected.

Q17~22 Regulated power supply Tr.

Q23,24 POWER-ANT SW Q24 turns ON when the base of Q23 is "H". Q25,28 POWER-CONT SW Q25 turns ON when the base of Q28 is "H".

Q26,27 POWER-CONT circuit output protection Q25 OFF to protect the output. This prevents malfunction of Q26 when

Q29 External amp control SW Turns ON when a pulse is input to the base. Q30 Dimmer control SW Small In is detected when the base is "H".

Q31 B-U detection

Q32 Acc detection "L" when Acc is present. Q33 Lch MUTE Dr L-ch audio muting SW drive. ON when the base is "L". Q34 Rch MUTE Dr R-ch audio muting SW drive. ON when the base is "L". Q35 Spectrum analyzer AGC Tr. Q36 E-Vol muting SW When the base is "L", turns ON to mute E-Vol. Q37 Noise buffer Q38 AUDIO MUTE SW Mutes the Front R CH hen the base is "H". Q39 AUDIO MUTE SW Mutes the Front L CH hen the base is "H". Q40 AUDIO MUTE SW Mutes the Rear R CH hen the base is "H". Q41 AUDIO MUTE SW Mutes the Rear L CH hen the base is "H". Q42 AUDIO MUTE SW Mutes the Non-FAD R CH hen the base is "H".

Q43 AUDIO MUTE SW Mutes the Non-FAD L CH hen the base is "H". Q45,46 FM+B SW Q46 turns ON when the base of Q45 is "H". Q47,48 AM+B SW Q48 turns ON when the base of Q47 is "H".

Q49 Composite signal buffer

Q50 PANEL 5V SW

"L" when Mask uCOM detection voltage is 3.7 V or less or when Flash uCOM detection voltage is 4.2 V or less.

FL & ILLUM AVR ON/OFF SW. Q12 turns ON when the base of Q11 is "H".

Upon detection of drop in the output voltage, these transistors turn

the POWER-CONT SW turns ON.

"L" when B-U is present. "H" when B-U is absent or momentary power down is detected."

When the panel is attached, the base goes "L", turning the transistor ON to supply 5 V to the panel.

KDC-8021/M9021/X859

COMPONENT DESCRIPTION

SWITCH UNIT (X16-16xx-xx)

Element Purpose & Function Operation, Condition, Compatibility

IC1 PANEL u-com IC2 SPECTRUM ANALYZER IC IC3 REMOTE CONTROL IC IC4 BUFFER IC It is changed into 3.3V from 5V IC5 3.3V REGULATER The power supply of IC and UFD(Logic) which are driver by 3.3V

Q1 REMO ON SW The power supply of IC2 and IC3 is turned on when the base level goes "L". Q2 SC-CON SW ON when the base level goes "H".

Q3,4 FL+B SW FL+B(VDD2) is turned on when Q3's base level goes "H".

Q5 FL BLK SW ON when the base level goes "H".

Q6,7 KEY ILLUMINATION SW

Lights green key-illumination when Q6's base level goes "H". Lights red key -illumination when Q7's base level goes "H".

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