Kenwood KDC-1023S, KDC-122S Service Manual
©
2002-11 PRINTED IN JAPAN
B53-0005-00 (N)1724
COMPACT
RDMLOUD REPSCAN
OFF
KDC-122
CRSC
AMEAUTOADJCLK
AUD
45W
x4
Panel assy
(A64-2907-02): KDC-122
(A64-2908-02): KDC-122S
Front glass
(B10-4355-01): KDC-122
(B10-4356-01): KDC-122S
Escutcheon
(B07-3060-02): KDC-122
(B07-3022-02): KDC-122S
COMPACT
RDMLOUD REPSCAN
OFF
KDC-1023
CRSC
AMEAUTOADJCLK
AUD
50W
x4
Panel assy
(A64-2909-02): KDC-1023
(A64-2910-02): KDC-1023S
Front glass
(B10-4357-01): KDC-1023
(B10-4358-01): KDC-1023S
Escutcheon
(B07-3001-02): KDC-1023
(B07-3022-02): KDC-1023S
DIGITAL AUDIO
DIGITAL AUDIO
DC cord
(E30-4784-05)
Mounting hardware assy
(J21-9716-03)
Lever
(D10-4589-04)
x2
Screw set
(N99-1719-05)
CD RECEIVER
KDC-1023/S
KDC-122/S
SERVICE MANUAL
CD mechanism operation description is not in this sarvice manual.
Please, refer to sarvice manual X92-4030-0x (B51-7867-00).
CD mechanism extension cord : W05-0618-00
KDC-1023/1023S/122/122S
2
BLOCK DIAGRAM
1200mV
1200mV
CD : 3600mV
CH : 3600mVAM(E) : 855mV
FM(E) : 1372mV
FM(J,K) : 1800mV
AM(J,K) : 600mV
CHANGER
KEY MATRIX
WITH
LCD DRIVER
LCD
REMOCON
MI-COM
CD
ANT
AM AGC
FM AGC
DECODER
RDS
RESET
IC
EEP-ROM
TUNER,MPX &
E-VOL.
SUPPLY IC
SW5V
SERVO
P-ANT
P-CON
POWER
MUTE
LOGIC
DET
ACC
BU
DET
MUTE
PRE
POWER IC
SP
ACC
UP
BACK
OUT
OUT
PRE
IC1
DATA H
MUTE
DATA C
REQ H
CH-CON
AUDIO OUT
CLK
REQ C
RST
BACK UP
BU5V
IC2
SW5V
LO/S
RST
LOE/LIM
MO
LO/EJ
STOP
MUTE
8EJE
SDA
SCLK
AUDIO OUT
12EJE
Q501
Q502
AM+B
FM+B
AM AGC OUT
IC6
CH
CD
SERVO
BU5V
A8V
TUNER OUT
BU5V
IC11
IC12
IC10
FM AGC OUT
A8V
SW2
SW1
ILLUMI
VCC
BU5V
AUDIO+B
AM+B
FM+B
BACK LIGHT
KEY ILLUMI
Q51,55
SW5V
Q50
SERVO
BU5V
FM+B
AM+B
A8V
P-CON
P-ANT
IC8
Q20
Q10
IC7
MUTE
Q223,224
IC4
KDC-1023/1023S/122/122S
3
● SWITCH UNIT (X16-1460-13/2370-11)
COMPONENTS DESCRIPTION
Ref.No.
Application/Functions Operation/Condition/Compatibility
IC1 LCD driver & key matrix
Q1 Key scan start When Q1 base goes Lo, key scan start.
● ELECTRIC UNIT (X25-9600-xx)
Ref.No.
Application/Functions Operation/Condition/Compatibility
IC1 System control µ-com System µ-com
IC4 Power amplifire E-Vol output encoder power amplification for speaker.
IC7 Power supply (Multi AVR) -
When a pin 1, 2, or 13 is "H", MUTE turns on
IC8 MUTE Logic When a pin 3, 4, or 5 is "H", P-AMP mute turns ON.
Changer is RESET when a pin 9, 10, or 11 is "L".
IC10 Tuner & E-Vol. FM/AM tuner & stereo decoder & E-Vol.
IC11 Power on reset When B.U. 5V voltage is less than 3.5V, power reset.
IC12 E2P-ROM Writing and read-out of adjustment data for a tuner
Q10 B.U. detector BU on (base "H") : Collector "H"
Q20 A.C.C detector ACC ON (base : "H") : Collector "L"
Q40 MUTE driver Base "L" : Mute on (collector "L")
Q50 SW 5V Base "L" : SW5V on
Q51 SERBO AVR control Pin 2 "H" : Serbo on (pin 4 "H")
Q53
Q55 SERBO AVR Base "H" : Serbo on
Q70 Surge detector Base "H" : Surge detect
Q223,224
MUTE Base "H" : Mute on
Q251
Q501 AM RF amplifire Base "H" : Gain UP
Q502 FM RF amplifire Gate "H" :Gain UP
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