Kenwood KDC-2092-RYA, KDC-2092-RYG, KDC-3021-A, KDC-3021-G, KDC-3021-YA Service manual

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CD RECEIVER

KDC-2092RYA/RYG KDC-3021A/G/YA/YG KDC-306A/G/YA/YG

SERVICE MANUAL

The CD mechanism infomation is not in this sarvice manual. Please, refer to sarvice manual X92-4030-0x (B51-7867-00).

Panel assy (A64-2563-02): KDC-2092RYA/RYG

KDC-2092R

COMPACT

DIGITAL AUDIO

RDMLOUD REPSCAN

OFF

Panel assy (A64-2553-02): KDC-3021A/G/YA/YG (A64-2565-02): KDC-306A/G/YA/YG

KDC-XXXX

COMPACT

DIGITAL AUDIO

RDMLOUD REPSCAN

OFF

WIDE BAND

50W

CD mechanism extension cord : W05-0618-00

Escutcheon (B07-3054-02)

PTY

VOL. ADJ

MENUCLK

AUD

Escutcheon (B07-3054-02)

PTY

VOL. ADJ

MENUCLK

AUD

DC cord (E30-4790-05)

Mounting hardware assy (J21-9641-13)

Plastic cabinet assy (A02-1486-13)

Antenna adaptor (T90-0523-05)

Lever (D10-4589-04)x2

IC4

IC12

IC1

POWER IC

TUNER

FM+B AM+B SW5V

BU5V

A8V

SERVO

BACK UP

E-VOL & MPX

u-COM

BU5V

TEL-MUTE

ACC DET.

BU DET.

BUFF

DECODER

RDS

IC6 ('E)

IC2

SW5V

E2PROM

SW5V

SERVO SW14V

IC7

IC2

IC1

PRE OUT

SP-OUT

ACC

TEL-MUTE

BACK-UP

P-CON

ANT-CONT

POWER SUPPLY

MUTE

PRE MUTE

DSIBU5V

REMOTE

SW5V

PAN DET.

PAN5V

LCD DRIVER

KEY MATRIX

With

ILLUM SW

A8V

CONTROL

BU5V

MARINE CN.

ANT-CON DET.

P-CON DET.

FM DET OUT AM DET OUT

REQUEST

LO/DX

PLL-CLK

PLL-CE

S-METER

PLL-DATA

MSDA

MSCLK

SW2

SW1

SW3

M MUTE

RST STOP LO/EJ

MO SW

RST

CH-CON

MUTE

DATA C

REQ H

DATA H

CLK

REQ C

FM AM

CD CH AFS

NOISE DET LEVEL

RDCK

DATAS

MUTE

RDDA

LO/DX

QUAL

PLL-DATA

PLL-CLK

AFS

NOISE

S-METER

SCL

SDA

PLL-CE

EN2 EN3

EN1

PC DET

PA DET

CLK

DATAL

REMO

PANEL

DSI

RES

SDA SCL

P-CON P.ANT FM+B VP2

AM+B AUDIO ILLUM

BU5V SW1

SW2

203mV 170mV

1200mV 1200mV

382mVK:

382mVJ:

(K)

(E) (K)

(J)

(J)AM

(E)

: 1605mV : 1276mV

: 561mV

: 1700mV

: 561mV : 792mV

: 3529mVCD.CH

LCD

KDC-2092RYA/RYG,3021A/G/YA/YG,

306A/G/YA/YG

BLOCK DIAGRAM

KDC-2092RYA/RYG,3021A/G/YA/YG,

306A/G/YA/YG

MICROCOMPUTER’S TERMINAL DESCRIPTION

SYSTEM MICROCOMPUTER µPD780058GC-XXX (IC1 : X25)

Pin No. Pin Name I/O Purpose Processing in STBY Mode

1 PANEL I Panel detection Hi-Z 2 8EJE SW *1 I 8 cm disk eject end detection switch L, L when the 8 cm CD compatibility is not provided. 3 NC O Not used L 4 AVss - GND potential (for A/D and D/A) 5 L-RST O LCD driver reset 6 L-CE O LCD driver chip enable L, L is output when the panel is detached. 7 AVREF1 I 5V power supply (D/A converter reference voltage) 8 NC I Not used Hi-Z 9 PLL-DATA I/O F/E (IC3) communication data L 10 PLL-CLK O F/R (IC3) communication clock L 11 L-DATAL I LCD driver communication data (LCD) Hi-Z 12 L-DATAS O LCD driver communication data (SYSTEM) L, L is output when the panel is detached. 13 L-CLK O LCD driver communication clock H, L is output when the panel is detached. 14 R-DATA I RDS DATA Hi-Z, L when RDS is not available. 15 R-QUAL I RDS QUAL Hi-Z, L when RDS is not available. 16 CH-DATAC I 5-wire communication data (CH) Hi-Z, L when CH is not available. 17 CH-DATAH O 5-wire communication data (HEAD) L, L when CH is not available. 18 CH-CLK I/O 5-wire communication clock Hi-Z, L when CH is not available. 19 CH-REQH O 5-wire CH request (HEAD) H, L when CH is not available. 20 PLL-CE O F/E chip enable L 21 AFS O Noise detection time constant switching L 22 LO/DX O Local seek switching L 23~26 NC O Not used L 27 SD I Station detection Hi-Z 28 CH-CONT O 5-wire communication CH ON output L, L when CH is not available. 29 TYPE REF O 30 TYPE2 I Destination type setting Hi-Z 31 TYPE1 I Destination type setting Hi-Z 32 TYPE0 I Destination type setting Hi-Z 33 Vss1 34 IC2TYPE1 I Servicing pin (SEL1), normally “L” Hi-Z 35 IC2TYPE0 I Servicing pin (SEL0), normally “L” Hi-Z 36 DATA I/O IC2, CD mechanism and F/E communication data L 37 CLK O IC2, CD mechanism and F/E communication clock L 38 MUTE O Muting control output L, 15 sec. after power OFF. 39 P-MUTE O PWR IC muting output H, 15 sec. after power OFF. 40 SVR O SVR control output L 41 P-STBY O PWR IC standby output L 42 SW5V O SW5 control output “H” in 10 sec. after power OFF. 43 B.U-DET I B.U. detection Hi-Z 44 ACC-DET I ACC detection Hi-Z 45,46 NC O Not used L 47~49 50 BEEP O Buzzer output L 51,52 53 DSI O DSI control output L, H/L when panel is detached. FIX output is L.

PS1-0~PS1-2

PS2-0,PS2-1

Destination type and servicing setting 5V output

GND potential (for other parts than ports and analog circuitry)

O Power supply IC AUD/P.CON/P.ANT SW L

O Power supply IC ILL/AM/FM SW L

H, L when the panel is detached or with 7-segment output.

KDC-2092RYA/RYG,3021A/G/YA/YG, 306A/G/YA/YG

MICROCOMPUTER’S TERMINAL DESCRIPTION / ADJUSTMENT

Pin No. Pin Name I/O Purpose Processing in STBY Mode

54 LOE/LIM SW I CD mechanism Down & Limit detection Hi-Z 55 MOSW O CD mechanism motor switching L 56 LO/EJ I/O Lo/Ej switching Hi-Z 57 M-STOP O Mechanism COM stop output L 58 M-RST O Mechanism COM reset output H 59 M-MUTE I Mechanism COM mute input Hi-Z 60 RESET I System reset input Hi-Z 61 REMO I Remote control input Hi-Z 62 R-CLK I RDS CLOCK Hi-Z, L when RDS is not available . 63 CH-REQC I 5-wire CH request (CH) Hi-Z, L when CH is not available . 64 LOS SW I Loading SW detection Hi-Z 65 KEY-REQ I Key input detection Hi-Z 66 12EJE SW I 12 cm disc detection Hi-Z 67 Vss0 - GND potential (for ports) 68 VDD1 69 X2 - Main system clock oscillation 70 X1 I Main system clock oscillation 71 IC - Flash uCOM write 72 XT2 - Not used 73 XT1 - Not used (Connected to 5V power supply) 74 VDD0 - Positive pow er supply (for por ts) 75 AVREF0 I 5V power supply (A/D converter reference voltage) 76 S-METER I S-meter input Hi-Z 77 PHONE I 78 NOISE I FM noise detection Hi-Z, L when RDS is not available. 79 NC O Not used L 80 AVCONT O A/D reference voltage control L

Positive power supply (for other parts than por ts and analog circuitry)

Navigation muting 2.5V or more, Telephone muting 1V or less

. Hi-Z, L when TEL is not available.

ADJUSTMENT

No. ITEM INPUT SETTINGS

FM SECTION

98.1MHz TEST MODE : ON

1SD 0 dev FM

35dBµ (ANT input) 98.1MHz

AM SECTION

990kHz TEST MODE : ON

(1) SD 0% mod AM

35dBµ (ANT input) 990kHz

TEST MODE : ON While holding the FM key and preset “6” key, reset the unit. TEST MODE : OFF Reset the unit.

TUNER (RECEIVER) ALIGNMENT

SETTINGS POINTS

Preset “1” key, and hold preset “6” key for a few seconds.

ALIGN FOR

While holding preset “1” key, press and

preset “6” key “ADJ OK” is good.

“ADJ NG” is not good.

While holding preset “1” key, press and

preset “6” key “ADJ OK” is good.

“ADJ NG” is not good.

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