Kenwood KDC-MP222, KDC-MP4023G Service Manual
CD RECEIVER
KDC-MP222
KDC-MP4023/G
SERVICE MANUAL
Panel assy
(A64-2863-02): KDC-MP222
© 2002-12 PRINTED IN JAPAN
B53-0013-00 (N) 1724
DC cord
(E30-4784-05)
Panel assy
(A64-2874-02): KDC-MP4023
(A64-2881-02): KDC-MP4023G
Plastic cabinet assy
(A02-1486-13)
Remote controller assy
(RC-410)
(A70-2025-05): KDC-MP4023/G
Escutcheon
(B07-3022-02): KDC-MP222
Escutcheon
(B07-3003-02): KDC-MP4023G
(B07-3022-02): KDC-MP4023
Remote controller assy
(RC-505)
(A70-2040-05): KDC-MP222
Mounting hardware assy
(J21-9716-03)
Screw set
(N99-1719-05)
Lever
(D10-4589-04)
Screw set
(N99-1610-15)
Size AA battery
(Not supplied)
2
TUNER
MP3
CH
SWITCH UNIT (X16- )
BUFFER
RDS
DECODER
BUFFER
EEPROM
REMOCON
RESET SW
WITH
LCD DRIVER
KEY MATRIX
LCD
DSI
u-COM
MPX
E-VOL
&
ACC DET
TEL MUTE
B.U DET
PRE MUTE
DRIVER
MUTE
POWER
IC
THERMAL
PROTECT
ACC
TEL MUTE
BACK UP
(REAR)
PRE OUT
SP OUT
SURGE DET
SERVOSERVO+B
SW 14V
WIRED REMO
SUPPLY
IC
POWER
ANT CON
P CON
RESET
SW 5V
PANEL 5V
SW5V
MECHA
+B
MECHA+
ILL SW
ILLUMI
IC7
IC2
IC1
IC4
IC3
IC8
IC1
IC2
S-METER
AUDIO OUT
IFC OUT
PLL-DATA
PLL-CLK
SW5V
AM+B
A8V
SW(SW3)
12EJE SW(SW2)
LO/S SW(SW1)
MS CLK
MS DATA
LO.E/LIM
M MUTE
LO/EJ
M STOP
M RST
SERVO+B
A8V
BU5V
MECHA+
DATA C
CH MUTE
CH RST
REQ H
REQ C
CH CLK
CH-CON
DATA H
BACK UP
QUAL
S-METER
R DATA
R CLK
FM
AM
MP
LEVEL
CD
QUAL
AFS
CH
SW5V
SW5V
BU5V
DSI
L CLK
L DATAS
L CE
L DATAL
REMO
MUTE
P-MUTE
PHONE
ACC DET
B.U DET
BEEP
PS1-0
PS1-1
PS1-2
PS2-0
PS2-2
RST
BU5V
BACK UP
A8V
SW5V
AM+B
ILLUMI
A8V
BU5V
BU5V
MODE
FM
AM
MP3
E-TYPE
1372mV
855mV
3600mV
K-TYPE
1800mV
600mV
3600mV
P-STBY
BU5V
TDF DET
PANEL
BU5V
SW5V
DATA
CLK
KDC-MP222
KDC-MP4023/G
BLOCK DIAGRAM
COMPONENTS DESCRIPTION
● SWITCH UNIT (X16-2050-1x)
Ref. No. Function Operation
IC1 LCD Driver
IC2 Remote-control sensor IC
Q1 Key-scan Start SW "ON" when the base goes “L”.
● ELECTRIC UNIT (X25-9620-xx)
Ref. No. Function Operation
IC1 System MI-COM
IC2 E-VOL. & N.C. MPX
IC3 Power Supply IC
IC4 Power IC
IC6 Analog SW (Mute logic)
IC8 Reset IC “L” : detection voltage below 3.6V
IC9 CD mechanism 5V AVR
Q1 SERGE Det. ON when the base goes “Hi”.
Q2 B.U. Det. ON when the base goes “Hi” during BU applied.
Q3 ACC Det. ON when the base goes “Hi” during ACC applied.
Q4 SW 5V ON when the base goes “Lo”.
Q21 SERVO +B AVR Output voltage 7.4V
Q22 SW 14V ON when the base goes “Hi”.
Q23 SW for power supply IC SW1 terminal of a power supply IC is controlled.
Q41 MECHA 5V AVR SW ON when the base goes “Lo”.
Q151 Panel 5V SW ON when the base goes “Lo”.
Q201 Noise buffer
Q350 Mute driver for Audio mute SW ON when the base goes “Lo”.
Q351 Pre mute SW
Q352 Pre mute SW
Q401 DSI ILLUMI SW ON when the base goes “Lo”.
Audio Pre-output is muted when the base goes “Hi”.
KDC-MP222
KDC-MP4023/G
3
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