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CD RECEIVER
KDC-8024
SERVICE MANUAL
© 2003-2 PRINTED IN JAPAN
B53-0033-00 (N) 1874
CD mechanism operation description is not in this service
manual.
Please, refer to service manual X92-4030-0x (B51-7867-00).
Panel assy
(A64-2985-01)
CD mechanism extension cord : W05-0935-00
s
50 4W
COMPACT
DIGITAL AUDIO
Escutcheon
(B07-3078-01)
Panel assy
(A64-3002-02)
Escutcheon
(B07-3078-01)
Remote controller assy
(RC-420)
(A70-2026-05)
Mounting hardware assy
(J21-9823-03)
Lever
(D10-4674-04) x 2
Plastic cabinet assy
(A02-2731-03)
Screw set
(N99-1734-05)
DC cord (ISO)
(E30-4942-05)
Antenna adaptor
(T90-0552-05)
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KDC-8024
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)
A
Rotary to the
stop position
B
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.
SW
C
702
284
F
E
SW
D
702
3
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BLOCK DIAGRAM
KDC-8024
(X25-964)
TUNER
AUDIO OUT
S-METER
CD
CH
Q501
EEP5V
IC1
EEPROM
TDF UNIT
(X16-208)
Q303,304
AM+B
8V 8V
8V
BU5V
8V
SERVO
CD4.7V
BACK UP
BU5V
DISPLAY
UNIT
(X16-212)
REMO
IC9
SWITCH UNIT
(X16-217)
BUFFER
IC14
RDS
DECODER
IC11
ROT ARY
ENCODER
SW5V
u-COM
BPF
BU5V
FL
KEY MATRIX
IC1
KEY
AGC
IC10
BPF
LEVEL
SHIFT
8V
BUFFER
AGC
SW5V
PANEL5
Q6,10
PANEL
SW5V
Q4
FL3.3V
Q2,3
FL+B
RESET SW
IC2
FM
AM
CD
CH
QUAL
u-COM
8V
E-VOL
&
MPX
KEY ILL
8V
IC15
MOTOR
FL+B
FAC
IC5
SYSTEM
E'S+
WOW
IC20
FOCUS
SW
IC8
RESET
IC16
SERVO
PANEL
MECHA
SW5V
DC/DC
IC6
BU5V
MOTOR
DRDR
IC9
8V
8V
MUTE
DRIVER
Q207,208
PRE MUTE
Q203,204
PRE MUTE
Q205,206
PRE MUTE
IC4
POWER
IC
BU5V
IC18
Q23,24
ANT-CON ANT CON
Q25
EXT AMP
Q26
DIMMER DIMMER
TEL MUTE
Q29
ACC DET
Q27
B.U DET
BU5V
SW5V
PANEL5V
SW14V
DC/DC A8V
9V
SERVO
CD4.7V
IC13
IC12
IC11
P-CON P CON
Q1,2
BU5V
Q3,601
SW 5V
Q502,503
PANEL
5V
Q4,5
SW 14V
Q6-8
A8V
Q9,602
SERVO
Q11-14
FL+B
IC19
SW REG
OP AMP
9V
OP AMP
9V
OP AMP
9V
PRE OUT
(NF)
PRE OUT
(REAR)
PRE OUT
(FRONT)
SP OUT (FL)
SP OUT (FR)
SP OUT (RL)
SP OUT (RR)
WIRED REMO/
OPEL DISP I/F
EXT.AMP.CON
TEL MUTE
ACC
BACK UP
3
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KDC-8024
COMPONENTS DESCRIPTION
● SUB-CIRCUIT UNIT (X16-2080-10)
Ref. No. Application/Function Operation/Condition/Compatibility
IC1 E2PROM For security
● SUB-CIRCUIT UNIT (X16-2120-10)
Ref. No. Application/Function Operation/Condition/Compatibility
IC1 3.3V regulator The power supply of IC and VFD (Logic) which are driven by 3.3V
IC2 Buffer IC It is change into 3.3V from 5V
IC3 Remote control IC
IC4 Spectrum analyzer IC
IC5 Panel µ-com
Q1, 2 FL+B SW FL+B (VDD2) is turned on when Q2’s base level goes “H”
Q3 REMO ON SW The power supply of IC2 and IC3 is turned on when Q3’s base level goes “L”
Q4 FL BLK SW VFD is turned on when Q4’s base level goes “H”
Q5 Blue LED SW Blue LED is turned on when Q5’s base level goes “H”
● SWITCH UNIT (X16-2170-10)
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”
● ELECTRIC UNIT (X25-9642-72)
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
IC5 System E’s IC
IC6 Audio IC (WOW)
IC8 Reset IC
IC9 Logic IC for muting
IC10 Buffer for S.A
IC14 RDS dcoder IC
IC15, 16
IC17 ROM IC For ROM correction.
IC18 P-CON IC
IC20 Analog SW for swiching IC6’focus
Q1, 2 B.U.5V AVR While BU is applied, BU5V AVR outputs +5V.
Q3, 601 SW5V When Q601’base goes Hi, 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 8.3V.
Q9, 602 SERVO+B AVR When Q602’base goes Hi, S+B AVR outputs 7.5V.
Q11~14 ILL&DC/DC+B AVR When Q11’base goes Hi, AVR outputs 9.2V.
Q25 Ex amp control buffer
Motor driver IC for panel mechanism
4