© 2002-11 PRINTED IN JAPAN
B53-0003-00 (N) 1724
COMPACT
DIGITAL AUDIO
RDM
LOUD
REP
SCAN
OFF
KDC-XXXX
CRSC
AME
AUTO
ADJ
CLK
AUD
50Wx4
Panel assy
(A64-2864-02): KDC-2022V
(A64-2865-02): KDC-2022
Escutcheon
(B07-3022-02): KDC-4023
Escutcheon
(B07-3022-02): KDC-202MR
(B07-3060-02): KDC-2022/V
(A64-2871-02): KDC-4023
CD MD-Changer Control
M. RDM
M. RDM
COMPACT
RDM
LOUD
REP
SCAN
OFF
KDC-202MR
CRSC
AME
AUTO
ADJ
CLK
AUD
45Wx4
Panel assy
(A64-2866-02): KDC-202MR
DC cord
(E30-4784-05)
CD MD-Changer Control
DIGITAL AUDIO
Depends on model. Refer to the parts list
Lever
(D10-4589-04)x2
Mounting hardware assy
(J21-9716-03)
Plastic cabinet assy
(A02-1486-13)
Remote controller assy
(A70-2025-05)
Screw set
(N99-1719-05)
Screw set
(N99-1610-15)
CD RECEIVER
KDC-2022/V
KDC-202MR
KDC-4023
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-2022/V/202MR/4023
2
BLOCK
DIAGRAM
1200mV
1200mV
CD : 3600mV
CH : 3600mV
AM(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
BA
CK
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-2022/V/202MR/4023
3
q SWITCH UNIT (X16-1460-1x/2370-10)
COMPONENTS DESCRIPTION
Ref.No.
Application/Functions
Operation/Condition/Compatibility
IC1
LCD driver & key matrix
IC2
Remote Sencer
Q1
Key scan start
When Q1 base goes Lo, key scan start.
q DAUGHTER UNIT (X89-2590-10)
Ref.No.
Application/Functions
Operation/Condition/Compatibility
Q221, 222 Audio mute SW
Audio preout is muted when the bose goes "H".
Q225
Audio mute driver
Mute driver for audio mute SW.
q 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 (bace : "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")
Q55
SERBO AVR
Base "H" : Serbo on
Q70
Surge detector
Base "H" : Surge detect
Q101
DSI driver
Base "H" : DSI on
Q102
PANEL 5V SW
Panel attch : PAN5V on
Q223,224 MUTE
Base "H" : Mute on
Q501
AM RF amplifire
Base "H" : Gain UP
Q502
FM RF amplifire
Gate "H" : Gain UP
KDC-2022/V/202MR/4023
4
MICROCOMPUTER'S TERMINAL DESCRIPTION
q SYSTEM MICROCOMPUTER uPD780058GC499 (X25 : IC1)
Pin No.
Name
I/O
Description
Processing Operation
1
TDF DET
I
Panel detection
H:Panel detached L:Panel attached
2
8EJE SW
I
H:Eject is completed
Except 8cm CD model:always output L
3
NC
O
Not used (out put L)
4
Avss
H:Panel detached L:RESET
5
L-RST
O
LCD driver RESET
3 normal H , Power off L
When 7seg model,output L
6
L-CE
O
LCD driver selection
H:Select (panel communication)
When panel attached,output L
7
AVREF1
8
NC
Not used (connected to 9pin)
9
IC10-DATA
I/O
IC10,E2PROM data communication
3 non communication : H
10
IC10-CLK
O
IC10,E2PROM clock communication
3 non communication : H
Non communication : H
11
L-DATAL
I
Data input from the LCD driver
When panel detached : L
3 Pull down on X25 unit,Pull up on X16 unit
12
L-DATAS
O
Data output to the LCD driver
When panel detached , output L
13
L-CLK
O
Clock output to the LCD driver
When panel detached , output L
14
R-DATA
I
Data input from the RDS
Except RDS model : output L
15
R-QUAL
I
Quality input from the RDS
Except RDS model : output L
16
CH-DATAC
I
Data input from the changer (new 5L)
Except changer model : output L
17
CH-DATAH
O
Data output to the changer (new 5L)
When non communication ,last data keeping
Except changer model : output L
18
CH-CLK
I/O
Clock input/output with the Changer (new 5L)
Check the old and new
Except changer model : output L
19
CH-REQH
O
Request output to the changer (new 5L)
L:Requset
Except changer model : output L
20
NC
O
Not used (output L)
21
AFS
O
Noise detection time constant switching terminal
H:Normal L:FM/AM seek and AF search
3 (When tuner SRC auto zero , L)
22-24
NC
O
Not used (output L)
25
CH-CONT
O
Changer control
H:Changer on L:Changer off
Except changer model : output L
26
TYPE REF
O
5V lines output for destination setting
H:During destination reading
27
SD
I
Tuner SD input
H:Station detected
28
NC
O
Not used (output L)
29
TYPE2
I
Destination type selection terminal 2
Refer to destination type list.
30
TYPE1
I
Destination type selection terminal 1
Refer to destination type list.
31
TYPE0
I
Destination type selection terminal 0
Refer to destination type list.
32
TUNER-TYPE1
I
Destination available/genuine model rool off
H:genuine model 1 L:available model
33
Vss1
34
TUNER-TYPE0
I
Destination available/genuine model noise cancel H:genuine model 0 L:available model
35
MUTE
O
Mute (E.Vol,Preset) control
H:mute on L:mute off
Power off after that 15 second L
36
M-DATA
I/O
Data input/output with the CD mechanism
3 non communication : H
37
M-CLK
O
Clock output to the CD mechanism
3 non communication : H
When adjustment = H
38
ADJ
O
Tuner lines adjustment
PS1-0,1=L
PS1-2,2-0,1=Hi-z
IC10-DATA,CLK=Hi-z
39
P-MUTE
O
Power IC mute control
H:mute off L:mute on
Power off after that 15 second H
40
SVR
O
Power IC servo control
H:When momentary power down detected
L:Nomal
41
P-STBY
O
Power IC standby control
H:Power IC ON L:Power IC OFF
42
SW5V
O
SW 5V control
H:SW5V OFF L:SW5V ON
Power off after that 10 second H
KDC-2022/V/202MR/4023
5
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No.
Name
I/O
Description
Processing Operation
43
B.U-DET
I
Back up detection terminal
H:power down L:B.U. on
44
ACC-DET
I
ACC detection terminal
H:ACC OFF L:ACC ON
45
PS1-0
O
Power supply IC SW1 control 0
Audio 8V,P-CON
46
PS1-1
O
Power supply IC SW1 control 1
Audio 8V,P-CON
47
PS1-2
O
Power supply IC SW1 control 2 P-ANT
Power supply IC SW2 control 0
48
PS2-0
O
ILL,FM,AM
Power supply IC SW2 control 1
49
PS2-1
O
ILL,FM,AM
50
BEEP
BEEP
H:Light on L:Light off
51
DSI
O
DSI control
When panel attached,output L
When panel detached,flashing at the panel (H/L)
FIX model is output L
52
NC
O
Not used (out put L)
53
NC
O
Not used (out put L)
54
LOE/LIM SW
I
CD mechanism down&limit detection
H:Chucking detection L:Normal
55
MO SW
O
CD mechanism loading motor control output
H:Loading,Eject,Break L:Play
56
LO/EJ
I/O
CD mechanism loading/Eject switching terminal H:Eject L:Loading
57
M-STOP
O
Stop output to the CD mechanism
H:Play L:Stop
58
M-RST
O
Reset output to the CD mechanism
H:Normal L:CD mechanism reset
59
M-MUTE
I
Mute input from the CD mechanism
H:mute off L:mute on
60
RESET
Reset input from the System microcomputer
61
REMO
I
Remote control input
62
R-CLK
I
RDS clock input
Except RDS model : output L
H:Changer detection
63
CH-REQC
I
Request input from the changer (new 5L)
L:Request
Except Changer model : output L
64
LOS SW
I
CD mechanism loading's switch detected
H:No disc
L:DISK IN(Loading Start)
65
KEY-REQ
I
Key input detected
H:Key no input
(11pin L connected to the DATA L)
L:Key input (edge key data reading start)
66
12EJE SW
I
12cm disc detected
L:12cm disc
67
Vss0
68
VDD1
69
X2
3 MAIN X'tal oscillating circuit
3 4.19MHz X'tal connection
70
X1
3 MAIN X'tal oscillating circuit
3 4.19MHz X'tal connection
71
IC
TEST
72
XT2
Not used
OPEN
73
XT1
74
VDD0
VDD
Connected to VDD
75
AVREF0
A/D converter reference voltage control output,
connection to the 80pin AVCONT
76
S-METER
I
S-meter input
77
NOISE
I
FM noise detection input
3
2.5V or greater:NAVI MUTE
78
PHONE
I
2way mute
1.0V or less:TEL MUTE
Except phone mute model : output L
79
NC
O
Not used (out put L)
80
AVCONT
O
A/D converter standard voltage control output
H:During A/D converter active
same timing with PON
BA4911 SW1
Power supply IC output
PS1-2
PS1-1
PS1-0
A8V
P-CON
P-ANT
L
L
L
STANBY
LL(H)
H(L)
ON
OFF
OFF
L
H
H
ON
ON
OFF
H
H
H
ONONON
BA4911 SW2
Power supply IC output
PS2-1
PS2-0
ILLUMI
FM
AM
L
L
STANBY
L(H)
H(L)
ON
ON
OFF
H
H
ON
OFF
ON