Kenwood KDC-X769 Service Manual

CD RECEIVER

KDC-X7 69

SERVICE MANUAL

CD mechanism operation description is not in this service manual. Please, refer to service manual X92-4030-0x (B51-7867-00).

Panel assy (A64-2980-01)

CD mechanism extension cord : W05-0935-00

50 4W

COMPACT

DIGITAL AUDIO

Escutcheon (B07-3079-01)

Panel assy (A64-3001-02)

Escutcheon (B07-3079-01)

Remote controller assy (RC-505) (A70-2040-05)

Mounting hardware assy (J21-9823-03)

Size AA battery (Not suplied)

Plastic cabinet assy (A02-2731-03)

Lever (D10-4674-04) x 2

Screw set (N99-1723-05)

DC cord (E30-6062-05)

Screw set (N99-1734-05)

KDC-X7 69

HOW TO THE PANEL MECHANISM ASSEMBLY

1. Fixed the position of operation side (Fixed the horizontal position when the panel opened)

q The mounting hardware (281) of operation side is rota-

tion (A) into the stop position with close side.

w As figure (B) line is just above and the gear (230) at-

tached to pin.

2. The slider assembly insert to bottom chassis

q The bracket for display panel (284) is leave down, in-

sert to the chassis (702). (C)

Rotary to the stop position

This line attached just above

Fig. B

(This figure from look at B arrow)

284

281

230

w The slider assembly insert to the chassis (702) after

that shift (D) direction.

e The bracket for displa y panel (284) is raised (E) direc-

tion.

r Keep the raising conditions, the slider assemb ly is shift

(F) direction. (Note) Do not bend the knob of chassis detection switch when the slider assembly insert.

702

284

702

BLOCK DIAGRAM

KDC- X769

(X25-968)

TUNER

AUDIO OUT

S-METER

Q63

EEP5V

IC1

EEPROM

BU5V

Q102,103

AM+B

BU5V 8V SERVO CD4.7V

BACK UP

BU5V

IC1

Q53

BUFFER

SW5V

u-COM

IC2

FM AM CD CH

QUAL

E-VOL

MPX

IC8

MUTE DRIVER

Q59,60

PRE MUTE

Q57,58

PRE MUTE

Q55,56

PRE MUTE

IC4

POWER IC

BU5V

AUX IN

IC11

OP AMP

IC10

OP AMP

IC9

OP AMP

Q25,26

P-CON P CON

Q23,24

ANT-CON ANT CON

Q29

EXT AMP

Q30

DIMMER DIMMER

Q33

ACC DET

Q32

B.U DET

PRE OUT (NF)

PRE OUT (REAR)

PRE OUT (FRONT)

SP OUT (FL) SP OUT (FR) SP OUT (RL) SP OUT (RR)

EXT.AMP.CON

ACC

BACK UP

TDF UNIT (X16-208)

DISPLAY UNIT (X16-214)

SWITCH UNIT (X16-219)

BU5V BU5V BU5V

IC2

LCD DRIVER

ROT AR Y ENCODER

IC1

LCD DRIVER WITH KEY MATRIX

LCD

KEY

KEY MATRIX

PANEL SW5V

IC3

REMOCON

BU5V

RESET SW

KEY ILL

IC13

MOTOR

IC7

RESET

BU5V

IC14

MOTOR DRDR

SERVO

PANEL MECHA

SW5V

BU5V

SW5V

SW14V

A8V

SERVO

Q1,2

BU5V

SW 5V

Q4,5

SW 14V

Q6-8

A8V

Q9,34

SERVO

Q11-14

ILL+B

SW REG

KDC- X769

COMPONENTS DESCRIPTION

● SUB-CIRCUIT UNIT (X16-2080-10)

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

IC1 E2PROM For security

● SUB-CIRCUIT UNIT (X16-2140-10)

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

IC1 LCD driver KEY Input IC2 LCD driver IC3 Remote control sensor Q1 KEY scan start SW ON when the base goes “L”. Q5, D26 VLCD AVR Q6 Q11 Dimmer control LCD back light control. OFF when the base goes “L”, ON when the base goes “H”.

● SWITCH UNIT (X16-2190-10)

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

Q1 DSI (Disabled System Indicator) DSI blinks when the base goes “H/L” Q2 KEY illumination SW (GREEN) ON (KEY illumination green) when the base goes “H” Q3 KEY illumination SW (RED) ON (KEY illumination red) when the base goes “H”

Remote control sensor power supply SW

ON when the base goes “L”.

● ELECTRIC UNIT (X25-9680-10)

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

IC1 System µ-com IC2 E-vol & N.C. & MPX IC3 Regulator IC for A8V IC4 Power IC IC6 IC7 Reset IC IC8 Logic IC for muting IC9~11 AMP for 4.5V Pre-out IC13, 14 IC15 ROM IC For ROM correction. Q1, 2 B.U.5V AVR While BU is applied, BU5V AVR outputs +5V. Q3 SW5V When Q3’base goes Lo, SW5V outputs +5V. Q4, 5 SW14V When Q5’base goes Hi, SW14V outputs 14V. Q6~8 AUDIO 8V AVR When Q6’base goes Hi, A8V AVR outputs 8.4V. Q9, 34 SERVO+B AVR When Q602’base goes Hi, S+B AVR outputs 7.4V. Q11~14 ILL+B AVR When Q11’base goes Hi, AVR outputs 10.5V. Q15, 16 AUDIO 10.7V AVR When Q16’base goes Hi, AVR outputs 10.7V.

Q17~19 Pre-Amp -9V AVR

Q20~22 Pre-Amp +9V AVR

Q23, 24 P-ANT SW When Q23’base goes Hi, P-ANT SW outputs 14V. Q25, 26 P-CON SW When Q26’base goes Hi, P-CON SW outputs 14V.

-9V AVR (DC/DC IC) for 4.5V Pre-out

Motor driver IC for panel mechanism

Q18 and 19 works as a differential amplifier, Q17 works as a driver and -9.0V is supplied to OP amp for Pre-out. Q20 and 21 works as a differential amplifier, Q22 works as a driver and +9.3V is supplied to OP amp for Pre-out.

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