CD RECEIVER
KDC-2023
KDC-2024SA/SG/SYA/SYG
KDC-2094YA/YG
KDC-222/S
KDC-3023
© 2002-11 PRINTED IN JAPAN
SERVICE MANUAL
B53-0004-00 (N) 3379
CD mechanism operation description is not in this sarvice manual. CD mechanism extension cord : WO5-0618-00
Please, refer to sarvice manual X92-4030-0x (B51-7867-00).
Panel assy Escutcheon
Panel assy Escutcheon
(A64-2870-02): KDC-2023 (B07-3001-02): KDC-2023
(A64-2867-02): KDC-222 (B07-3060-02): KDC-222
(A64-2873-02): KDC-3023 (B07-3022-02): KDC-3023
(A64-2868-02): KDC-222S (B07-3022-02): KDC-222S
CD MD-Changer Control
KDC-222 KDC-XXXX
COMPACT COMPACT
DIGITALAUDIO DIGITAL AUDIO
CRSC CRSC
LOUD SCAN RDM REP CLK ADJ AUTO AME LOUD SCAN RDM REP M. RDM CLK ADJ AUTO AME
OFF AUD OFF AUD
Escutcheon Panel assy Escutcheon
Panel assy
(B07-3001-02): KDC-2024SA/SG/SYA/SYG (A64-2884-02): KDC-2094YA/YG (B07-3001-02): KDC-2094YA/YG
(A64-2878-02): KDC-2024SA/SG/SYA/SYG
KDC-2024S KDC-2094 WIDE BAND
COMPACT COMPACT
DIGITALAUDIO DIGITALAUDIO
MONO MONO
LOUD SCAN RDM REP CLK ADJ AUTO AME LOUD SCAN RDM REP CLK ADJ AUTO AME
OFF AUD OFF AUD
DC cord DC cord(ISO) Mounting hardware assy Plastic cabinet assy
(E30-4784-05) (E30-4790-05) (J21-9716-03) (A02-1486-13)
Lever Antenna adaptor Screw set Screw set
(D10-4589-04)x2 (T90-0523-05) (N99-1719-05) (N99-1610-15)
Depends on model. Refer to the parts list
A8V FM(J,K) : 1800mV
FM+B
FM(E) : 1372mV
IC10
Q502 Q223,224
AM(J,K) : 600mV CD : 3600mV
AM(E) : 855mV CH : 3600mV
PRE PRE
ANT
FM AGC
FM AGC OUT
MUTE OUT
IC4
AM+B
Q501
AM AGC POWER IC
AM AGC OUT
SP
IC8
TUNER,MPX &
OUT
MUTE
E-VOL.
MUTE
SERVO
CD LOGIC
A8V
BU5V
Q10
1200mV
AUDIO OUT CH
BU BACK
CD
12EJE
DET UP
LO/S
SCLK
IC12
SDA Q20
8EJE EEP-ROM
ACC
IC6
MUTE
ACC
DET
RST
IC11
RDS
BU5V
STOP
DECODER
IC7
RESET
LO/EJ
MO
IC
POWER
LOE/LIM
SUPPLY IC
IC1
P-CON P-CON
P-ANT P-ANT
CHANGER
AUDIO OUT Q51,55
RST
VCC
SERVO
SERVO
REQ C
MI-COM
CLK
SW1
DATA H
SW2
CH-CON
Q50
REQ H
DATA C BU5V
SW5V
SW5V
MUTE
BU5V
FM+B FM+B
BACK UP
AM+B AM+B
A8V AUDIO+B
BU5V SW5V
ILLUMI
IC2
REMOCON
LCD
LCD DRIVER
WITH
KEY MATRIX
2
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
BLOCK DIAGRAM
TUNER OUT
KEY ILLUMI
BACK LIGHT
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
COMPONENTS DESCRIPTION
SWITCH UNIT (X16-1460-xx/2370-12)
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.
ELECTRIC UNIT (X25-9600-xx/9612-7x)
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")
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
3
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
MICROCOMPUTER'S TERMINAL DESCRIPTION
SYSTEM MICROCOMPUTER uPD780058GCxxx (X25 : IC1)
Pin No. Name I/O Description Processing Operation
1 TDF DET I Panel detection H:Panel detached L:Panel attached
H:Eject is completed
2 8EJE SW I
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
H:Select (panel communication)
6 L-CE O LCD driver selection
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
When non communication ,last data keeping
17 CH-DATAH O Data output to the changer (new 5L)
Except changer model : output L
Check the old and new
18 CH-CLK I/O Clock input/output with the Changer (new 5L)
Except changer model : output L
L:Requset
19 CH-REQH O Request output to the changer (new 5L)
Except changer model : output L
20 NC O Not used (output L)
H:Normal L:FM/AM seek and AF search
21 AFS O Noise detection time constant switching terminal
"3 (When tuner SRC auto zero , L)
22-24 NC O Not used (output L)
H:Changer on L:Changer off
25 CH-CONT O Changer control
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
H:mute on L:mute off
35 MUTE O Mute (E.Vol,Preset) control
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
H:mute off L:mute on
39 P-MUTE O Power IC mute control
Power off after that 15 second H
H:When momentary power down detected
40 SVR O Power IC servo control
L:Nomal
41 P-STBY O Power IC standby control H:Power IC ON L:Power IC OFF
SW 5V control H:SW5V OFF L:SW5V ON
42 SW5V O
Power off after that 10 second H
4
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
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
Power supply IC SW1 control 0
BA4911 SW1 Power supply IC output
45 PS1-0 O
PS1-2 PS1-1 PS1-0 A8V P-CON P-ANT
Audio 8V,P-CON
L L L STANBY
Power supply IC SW1 control 1
L L(H) H(L) ON OFF OFF
46 PS1-1 O
Audio 8V,P-CON
L H H ON ON OFF
H H H ON ON ON
47 PS1-2 O Power supply IC SW1 control 2 P-ANT
Power supply IC SW2 control 0
48 PS2-0 O BA4911 SW2 Power supply IC output
ILL,FM,AM
PS2-1 PS2-0 ILLUMI FM AM
L L STANBY
L(H) H(L) ON ON OFF
Power supply IC SW2 control 1
49 PS2-1 O H H ON OFF ON
ILL,FM,AM
50 BEEP BEEP
H:Light on L:Light off
When panel attached,output L
51 DSI O DSI control
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
H:No disc
64 LOS SW I CD mechanism loading's switch detected
L:DISK IN(Loading Start)
Key input detected H:Key no input
65 KEY-REQ I
(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
A/D converter reference voltage control output,
75 AVREF0
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)
H:During A/D converter active
80 AVCONT O A/D converter standard voltage control output
same timing with PON
5
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
MICROCOMPUTER'S TERMINAL DESCRIPTION
MECHANISM MICROCOMPUTER MN6627771KP (X32 : IC2)
Pin No. Name I/O Description Processing Operation
1 TVD O Traverse driver output (PWM output)
2 SPL O Spindle motor drive output (PWM output)
3 PC O Spindle motor ON output L:ON H:OFF (default )
4 PWM O multi-purpose PWM output It's possible to setup the TOSF2
5 TBAL O Tracking balance adjust output (PWM output)
6 FBAL O Focus balance adjust output (PWM output)
7 NRFDET I RF detection signal input L:detected
8 OFT I Off-track signal input H:detected
9 BDO I Drop out signal input H:detected
10 LDON O Laser on signal output H:ON When command FO on,LDON is H
11 DSLB O DSL balance output
12 DVDD1 - Power supply for digital circuit
13 DVSS1 - Ground lines for digital circuit
14 AVSS2 - Ground lines for analog circuit For DSL,PLL and AD
15 DSLF I/O Loop filter terminal for DSL The bias of ARF output terminal in one
16 ARF I RF signal input
17 RFSW I When DSL circuit,constant switch terminal
18 PLLF I/O Loop filter terminal for PLL
19 PLLF2 I/O Loop filter characteristic switching terminal for PLL
20 IREF I Standard voltage input terminal
21 RFENV I RF envelope signal input Analog input
22 TRCRS I Track cross signal input Analog input
23 TE I Tracking error signal input Analog input
24 FE I Focusing error signal input Analog input
25 AVDD2 - Power supply for analog circuit For DSL,PLL and AD
26 AVSS1 - Ground lines for analog circuit For audio output (Lch and Rch in one)
27 OUTR O Rch audio output
28 AVDD1 - Power supply for analog circuit For audio output (Lch and Rch in one)
29 OUTL O Lch audio output
30 DVSS3 - Ground lines for digital circuit
31 CSEL I Oscillation frequency specification terminal H:33.8488MHz L:16.9344MHz
32 NC O Not used
33 ASEL I Audio output polarity switching terminal L:Reverse H:Non reverse
34 MSEL0 I Destination type selection port (set 2bit) Order "MSEL 0" and "MSEL 1" Set up
35 MSEL1 I Destination type selection port (set 2bit) Order "MSEL 0" and "MSEL 1" Set up
36 ICRST O Reset control terminal for external DAC
37 BCLK O Bit clock output for serial data
38 LRCK O L/R identification signal output
39 SRDATA O Sirial data output
40 VREFP I A/D converter standard power supply input
41 HOT I Temperature protection detection terminal (AD input) Over C5(h):on
42 8EJE_SW I 8cm disc eject stop detection terminal H:Stop
43 12EJE/SDET_SW I Judge the 8cm or 12cm disc 12cm disc stop detection terminal
44 LOE/LIM_SW I Pick-up inside detected Loading end detection terminal
45 PCK O PLL extracted clock output,etc
46 EFM O EFM signal output,etc
47 SENSE O Optics servo status signal output,etc
48 CLVS O Spindle servo phase synchronous signal output,etc L:Normal operation H:Luff servo
49 DEMPH O Dephase detection signal output,etc H:on
50 DVDD2 - Power supply for digital circuit
51 X1 I Main clock input terminal
6
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Name I/O Description Processing Operation
52 X2 O Main clock output terminal
53 DVSS2 - Ground lines for digital circuit
54 XSUB1 I When external DAC,external clock input terminal
55 XSUB2 O
56 TEST1 I Test port 1 Normal operation is H fixed
57 TEST2 I Test port 2 Normal operation is H fixed
58 NC O Not used
59 VER/HOR O Put length or breadth switching motor terminal H:Put length L:Put breadth
60 DRV_MUTE O Driver mute control terminal L:MUTE ON H:MUTE OFF
61 /MUTE_L O Audio Lch MUTE output L:MUTE
62 /MUTE_R O Audio Rch MUTE output L:MUTE
63 /RST I LSI reset input terminal H:Normal L:Reset
64 OCD_CLK I When OCD connected, clock input
65 /MSTOP I Standby detection terminal H:Normal L:Mecha stop
66 DATA I/O I2C bus data line (communication line with system computer) At that time serial writer connected
67 SBIO I When connected to serial writer,data input terminal
68 /CLK I/O I2C bus clock line (communication line with system computer) At that time serial writer connected
69 TX O Digital audio interface signal output
70 EQCNT O RF EQ switching terminal L:x2 times H:x1 times
71 XSEL I During the external DAC connection MCLK external input (H:input)
72 MCNT I CD mecha Loading/Eject control ON/OFF L:OFF (HOST control) H:mechanism control
73 P-ON O Audio and servo origin power control terminal L:power on H:power off
74 MOTOR O Loading/Eject control switching terminal At that time LO/EJ is "H"
75 LO/EJ O Loading/Eject control terminal or output L When 72pin (P82) is "L",output "L"
76 CD-RW O CD-RW control terminal H:CD-RW L:normal
77 LDCNT O LD control terminal Operation is same LDON as timing
78 DVDD3 - Power supply for digital circuit
79 FOD O Focus driver output (PWM output)
80 TRD O Tracking driver output (PWM output)
System mi-com Destination type list
TYPE2 TYPE1 TYPE0 MODEL NAME
L L L KDC-2024SA/SYA, 2024SG/SYG
L L H KDC-2022, 2022V,202MR
uPD780058GC499
L H L RY-391CD, RX-491CD
L H H KDC-4023, 2023, 3023
L L H KDC-122, 122S
uPD780058GC501 L H H KDC-1023, 1023S
H L H KDC-222, 222S
L L L KDC-3024G/YG, 307G/YG
L H H KDC-3023R
uPD780058GC502
H L L KDC-3024A/YA, 307A/YA
H L H KDC-4024/Y/V/YV
uPD780058GC503 L L L KDC-2094YA/YG
H: R135 R137 R139
L: R136 R138 R140
7
A B C D E
CD PLAYER UNIT (X32-5380-00)
1
C33 D.GND
C34 0.1
0.1
4.80V
C32 0.1
Rch Lch
BU+5V
0V 41
DTC114YUA
4.80V 2.40V
HOT
C72 C71
42
R100 C100
8EJE(SW2)
DTC143TUA 2200P 2200P
10 1000P
43
12EJE/SDET(SW3)
2 UN5111
R42
4.7K
4.80V 44
2SA1036K
LOE/LIM(SW4)
C70 C69
45
2SA1362
PCK/NTLOCK/FCLK/STLD
2200P 2200P
46
EFM/NFLOCK/CLDCK/STCK
2SA1576A
47
SENSE/RESY/FLAG/STOUT
48
CLVS/VDET/CRC
C76 C75
49
DEMPH/TRCRSO/TEXTCRC
6800P 6800P
4.80V 50
DVDD3
IC2
3.0pp
51
X1
CD SIGNAL PROCESS
BULT-IN MI-COM
5.0pp
52
X2
53
X1
DVSS2
16.934MHz
54
XSUB1
55
0V
XSUB2
3 2SC4081
4.80V 56
TEST1
4.80V 57
TEST2
58
A+5V A.GND
NC
59
VER/HOR
4.80V 60
DRV MUTE 4.80V
DTA114EUA
DTA124EUA
4 DTC124EU
SBIO
CP5
100Kx4
CN2
0V
D.OUT 22
S2
4.90V
21
12EJE SW
R43
Q2
12EJE SW
1K
D.5V
S1
SW
4.90V
LOS SW 20
LOS SW
CP1
100x2
CLK 19
DATA 18 66
5
DAN202U
68
0-4.9V "S4
4.90V
8EJE SW 17
D2
NC 16 8EJE SW
4.90V
BU+5V 15
0V
D.GND 14
CP2
Q3,4
Q3
100x4
A.8V
4.90V
Q4
MUTE R 13 62 SW
4.90V
4.7K
MUTE L 12 61
4.90V
MRST 11 63
10K
S3
4.90V
MSTOP 10 65
DA204U
7.80V
A.+8V
DTA114YUA A.+8V 9
3.84V
6
Lch 8 L
0V
A.GND 7
3.84V
DOWN&LIMIT
Rch 6 R A.GND
0V
SWITICH
LO/EJ 5 5
0V
MOTOR 4 4
7.80V
S.7.5V 3
0V
S.GND 2
4.90V
LOE/LIM SW 1
MA142WK 3SK126 BR24C01AF-W
UN5212
7
C101
C102
1000P
1000P
29
R93
100K
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
27
29
NC
ASEL
CSEL
BCLK
LRCK
OUTL
OUTR
27
ICRST
AVSS1
MSEL1
AVDD1
MSEL0
DVSS3
VREFP
AVDD2
SRDATA
100
330
330
100
330
330
R88
R86
R82
R87
R85
R81
L
R
RST
OCD CLK
MSTOP
D ATA
SBIO
CLK
TX
EQCNT
XSEL
MCNT
P-ON
MOTOR
61
71
62
72
63
65
66
68
69
70
73
75
64
67
74
61
IFZL
62
IFZR
0.1
0.1
C46
C47
63
65
66
68
2.2
C36
10K
R44
200
to MAIN UNIT
R72
22K
22K
F G H I J
1
RFENV
ARF
C2
2.2
R4
IOP+ IOP-
10
C3
R7 3.6K
1 Q1
RF
C7 R6
0.1 3.3K
C5
R41
2P
47K
APC
C45 0.1
C44 1000P
D1
1.25V
2.40V
C43 2200P IC1
20
1.70V IREF
19
R40 C42
0V PLLF2
820 0.047
18
2
0.95pp
PLLF
R39 100K
17 2.50V
C41 R15
0.91pp
0.87pp RFSW
1000P 4.7K
16
ARF
15 2.45V
DSLF
14 0V
AVSS2
13
4.80V DVSS1
12
DVDD1
VDET
R8 R11
R38 C40
0-4.8V
C2 27K 33K
220K 0.015
11
2.50V B/TE
DSLB
L PROCESSOR
10 4.80V
R10 C13 C16
0V LDON
-COM
100K 270P 330P
9
BDO 9
8
OFT 8
C14 R35
7
4700P 39K
2.40V NRFDET 7
4
6 2.00V
FBAL 6
5
CN1
TBAL 5
3
4.80V
4
Vref 1 VCC
PWM 4
2.50V
2 VC
CP4
0V
IC1
3 GND
4.7Kx4
R1
3
RF AMPLIFIER 4 LD
2.35V PC
91
0V
ADAPTED FOR CD-RW
2
5 VR
SPL 2
0.17V
1
6 PD
2.40V
TVD 1
2.69V
CD 7 C+D
D3
CP3
2.50V
E 8 E
2.69V
A 9 A
R53 R52
2.40V 2.69V
D.5V
B 10 B
4.7K 4.7K
2.69V
F 11 F
C48
2.50V
Q6 Q5
Q5,6
1.8Kx4 12 GND
6800P
3.84V
VREF 14 13 FCS+
C50
3.81V
BUFFER
16 14 TRK+
3.81V
6800P
15 15 TRK-
4
3.84V
R45
13 16 FCS-
10K
D.GND
S.GND
R43
IC1 : AN22002AA
1K
IC2 : MN6627771KP
SLED OUT
IC3 : BA5824FP
/LOAD
TRK SLED
DM2 (X92- )
Q1 : MCH6101
18 M
R51 R32
Q2 : 2SA1362(Y)
10K 10K TRK IN
17 Q3 : DTC124EUA or
UN5212
C51 C37
16
1500P 0.01 Q4 : DTA143XUA
SLED IN
15 LOADING & SLED
/EJECT Q5 : 2SC4081
5
MOTOR
Q6 : 2SA1576A
TRK OUT
D1 : DAN202U
D2 : MA8051-L
IC3
D3 : DA204U
4CH BTL
DRIVER
SIGNAL LINE
GND LINE
B LINE
S4
X32-5380-00 NO
2.35V
X32-5380-01 YES
FCS UP
C49 C38
14
1500P 0.01
SPDL-
6
13 DM1 (X92- )
FCS R47
2.2K R48
79 11 M
FCS DOWN
10K
R33 R34 C61
12
SPDL 18K 10K 2.2
2
SPINDLE
SPDL+
MOTOR
S.7.5V
CAUTION : For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts list).
7
!
Indicates safety critical components. To reduce the risk of electric shock, leakage-current or resistance measurements shall be
carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer.
" DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual
instruments or/and units.
C10
0.033
C9
C11
C12
4700P
3300P
6800P
+
FE
A/TE
1
C1
C8
R14
100K
TRCRS
10u6.3
7
8
9
OFT
BDO
R5
C6
NRFDET
3.3K
39P
28
27
26
25
24
23
22
21
FE
24
TE
23
OUTR
27
AVSS1
AVDD1
AVDD2
RFENV
TRCRS
22
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
LD
PD
ARF
RFN
CEA
VCC
BDO
RFIN
OFTR
CBDO
CAGC
3TOUT
COFTR
RFOUT
NRFDET
VREF
GND
VDET
TEBPF
TEOUT
TEN
FEN
FEOUT
GCTL
FBAL
TBAL
E
F
D
B
C
A
21
31
18
19
20
22
23
25
26
28
29
30
32
17
24
27
0.1
C31
C15
2200P
R12
R13
240K
910K
R3 5.6K
R2 5.6K
6
5
F
A
E
B
CD
R9
3.9K
R37
6.2K
0.01
10K
22
C39
R36
23
24
C17 0.1
C18 0.1
GCTL
XSEL
MCNT
P-ON
MOTOR
LO/EJ
CD-RW
LDCNT
DVDD2
FOD
TRD
71
72
73
75
76
78
79
80
74
77
to PICKUP
27K
39K
R46
R49
79
80
0.1
C52
1
80
5
4
R31
27K
R50
3.9K
18
17
R71
13K
4
30
29
28
27
26
25
23
22
21
20
19
18
17
16
IN3-
CNT
VO4-
VO3-
INSL-
VO4+
VO3+
OUT3
INSL+
OUTSL
PREVCC
POW VCC2
BIAS
IN2-
OUT2
IN1+
IN1-
OUT1
PREGND
MUTE
LDIN
POW
GND1
POW
POW GND2
VCC1
VO1-
VO1+
VO2-
VO2+
1
2
3
5
6
8
92
4
7
11
12
10
13
15
14
11
12
K L M N O
J4 TOP VIEW
CLK DATA H Lch Rch CHCON BUP D GND
" D REAR
13 11 12 8 4 3 2
REQ C DATA C A GND RST MUTE REQ H J5
1
9 10 6 7 5 1
(X25-9600-xx/9612-7x) "C227 "C228
J4
680P 680P
1 5 9
D GND
2 6 10
R227 R228
13
30K 30K
3 7 11
BU
Q223 Q224
4 8 12
MUTE "IC4
2
"WH1
5
4
3
"Q40
2
1
MUTE
DRIVER
D411
" C
"W407
C252
"R252
"W161 0.22u50 4.7K
J1
L501 R501 6.8K C504 L504
"W408
3 C253
6.8uH 0.01 Q501 100uH
0.22u50
L502 "R253
AM RF
33uH 4.7K
AMPLIFIRE
D501
L4
R502 R503
3
2.2K 2.2K
R507 1K
7
GND
6
CF54
C585
L513 450kHz
C507
4.7uH
W601 0.01
"C529 33u10
+
"C522
2P
C591 L512
33u10
4.7uH
"L505
D503
+
FM RF C511
"L506
0.01
AMPLIFIRE
8
L510
L508 C580
"C521
4.7uH W508 0.01
"C526 "C530 Q502
L509
10
"D504
C535
4
"R526
2P
12
8.0V
"W524
13
"R529
W533
330
"D505
C533
AM 3.3V
AM
FM 2.0V
FM 2.0V FM
0.01
0V
0V
R528
FM 4.2V
15 C512 AM
AM 3.2V
AM 3.3V
100K 4.7u16 5.0V 1
FM 2.0V
VREF5V 0V
+ 0V
0V 2
W505
TUNGND
C513 0.01
3 AM 2.4V
W507
3 AMMIX1IN+
0V
17
C514 0.01
4
AMMIX1IN- AM 4.1V
"D506 "L507
C515 1 5 PW-ON 3.2V
ANAGC1TC
0V
C542
60mV 6
18
6 ANAGC1OUT
AM 3.4V
22P 7
7 ANAGC1VOUT
0V
R543 R544
"C537 8
5.6K 2.2K
IC10
8 FMMIX1IN1
20
5 0V 9
RFGND TUNER &
"C538 10 FM 2.0V E-VOL.
MPX NOISE " E
10 FMMIX1IN2
0V
BUFFER BUFFER 0V 11
11 FMAGC1OUT
0.7V 12
12 FMAGCIN
R541
Q503 Q201
1K R204 W512 8.0V 13
13 FMAGCVOUT
AM 4.2V
"CN3
1K W523 14 PW-ON 2.8V
R542 4.7K
14 FMANTADJ
2 0V
15
R205 4.7K 15 FMRFADJ
0V 16
OSCGND
R547 22
3.2V 17
"W402 "W403
17 VCOE
61
3.8V 18 3.4V 4.8V
18 VCOB
0V 3.4V
1
L517
8.0V 19
OSCVCC 2.4V
20
4.7uH
0.8V
5.0V
IC6
0V
C546
0.01
R351 2.2K 1
5.0V
15 QUAL
LFOUT
0V
R352 2.2K
2
R353
14 RDDA 16
RDCL
5.0V
6 15 2.2K
0V T57
14 C356
X501
OSCOUT
C351
10P C552
10u6.3
2.4V 3
VREF 10.250MHz 0.01
C355
13
+
2.4V 4 OSCIN
R545
MPX
4.332MHz 10P C593
4.3K
5.0V 5
1
OSEL
12 5.0V
VCC
11 0V
EXTRES
0V 6 C550
10 0V
GND
TM
7
9 0V 0.033
ARI
FSEL
RDS
8
DECODER FILOUT
"C558
W530
0.01
7
41
+
1u50
C255
W160
"
+
C256
"
CLK
4.7K
4.7K
R2 6
REQ H
REQ C
"
D ATA H
CH CON
270
100
Rch
RST
MUTE
A GND
W516
D ATA C
2
4
6
8
10
+
+
C223
R223
R231
C224
10u16
270
100
10u16
R224
R232
R404 100
R410 100
R411 100
VCC1
STBY
R405 4.7K
R406 4.7K
R407 4.7K
R409 4.7K
R408 4.7K
PGND1
PGND2
W156
+
C401
1
1u50
R401 10
Lch
8
25
63
19
17
18
+
+
1u50
R402 10
C403
C402
100u10
R403 4.7
TA B
D404
1
3
5
7
45
46
44
D407
D405
D410
D403
D402
D408
D401
16
D409
22K
22K
D268
D264
D265
FR-
OUT1-
SVR
RR-
OUT2-
RR+
OUT2+
D3
12
FL
RL
FR
RR
68P
C502
C509
C510
100P
1500P
10P
+
+
1M
0.1
R506
C503
C508
22u10
"
0.1
4.7u16
C506
C505
R521
100K
C516
W521
1K
"
0.01
1mH
L503
C525
C524
R505
W400
"
CF51
10.700MHz
IN
OUT
GND
W509
1
2
3
L511
4.7uH
0.01
C534
W511
1K
C583 0.1
CF52
"
10.700MHz
CF53
C581 R581
"
"
10.700MHz
C536
"
0.1
C582
80
79
78
77
76
75
74
73
72
71
70
69
68
67
IFVCC
IF1GND
100K
R522
C523
TUNVCC
C531
R523
"
MIX1OUT1
MIX1OUT2
AMMIX2IN1
FMNAGCIN
AMMIX2IN2
AMMIX2OUT
FMIFAMP1IN
FMIFAMP2IN
11
FMAMP2OUT
14
FMIFAMPREF
6P
FMIFAMP1OUT
100K
C528
W401
W500
1
100K
"
"
330
R525
W415
W504
100K
R527
C541
15P
68P
C544
C543
R524
C545
6800P
"
20
1K
330P
C352
R173
57
"
W531
51
77
+
62
C555
C600
W534
1000P
100u10
LFREF
LFIN
LFHC
PLLGND
PLLVCC
XTALG
XTALD
DIGGND
DIGVCC
TUNQUALITY
ISSTC
DEVTC
21
31
22
32
23
25
26
28
29
30
24
27
33K
X2
R546
L514
+
C553
C554 0.1
"
C547
10u10
C548 0.022
+
0.01
C551
4.7uH
0.01
C353
C354
C549
2200P
10u6.3
L515
4.7uH
0.01
C557
"
P Q R S T
J2 2 4 6
1 3 5
E2P-ROM
R10
R20 D10
30K
IC12
3.3K
"Q251
8 5.0V
TH1 VCC 1/2W
47K
SURGE
7 0V
470
W158 1 WP DETECTOR
A0
10K ACL
2
R71
5V Q70
A1
D70
82K
6 0V
3 R22
SCL SCL
A2
D252 "R258
0V 4
ADA
10K
GND Q20
5V
5
0V
SDA SDA
TEL
C21
MUTE
0.01
C30
A. C. C
0.01
DETECTOR
D30
" A
0V
Q10
0V
5.0V
B. U.
DETECTOR
"R31
47K
IC8
MUTE
R23 R12
LOGIC
100K 100K
" F POWER
AMPLIFIRE
W532
0V
0V
0V
8
L101
4.7uH
CF54
"C592
450kHz
0.01
"Q252
"C590
R123
D
0.1
CP1
1K
10Kx2
CP3 CP2
Q252,253
5.0V 0V 1Kx2 2.2Kx2
"
SMETERRC &
"Q253
MPTHTC SW
IC11
5
POWER
4.4V
509 0
ON
RESET
SV
5.0V
8.0V
0V 0V P-MUT
5.0V
60
TUNER 5V 0V or 5.0V
R127
MPTHTC
5.0V 0V
CHANGE 0V
59 2.2K 61
0V
RDSMUTE 59 61 REMO 5.0V N.
5.0V
58 0V
FM 4.2V 5.0V
AUDIOMUTE 61 0V
CL
AM 1.4V AM 2.4V 57 62 0V
5.0V
QUALITY 57 62 R-CLK or 0V
V FM 1.2V 0V
0V
5.0V
56 W519 63
0V 5.0V
63
SMETER 0V
DATA
FM 4.0V "R414 100K CH-REQC 5.0V 0V
AM 3.7V
0V 55 W517
0V
0V SD 55
R129 2.2K 64 5.0V
5V
64 CD-SW1 MUT
FM 5.0V R567 0V
0V 5.0V
65
0V 54 1K
KEY-REQ 0V 5.0V
SCL SCL
5V
0V
FM 2.6V
0V R130 2.2K 5.0V
66
R566
TUNER-TYPE
0V 66 CD-SW2
0V
53 1K
0V 67
SDA SDA 0V or 5.0V
Vss0
R565 100K 5.0V 68
VDD1
C104 R131
69
Vss
AM 3.0V C563
X2
PW-ON 1.9V 52 0.47u50 "IC1
15P 6.8K
FMMUTETC TUNER-TYPE
0V
+
51 3.9V X1
IC10
TUNEROUT 51 SYSTEM
C105 4.194MHz
TUNER & 15P CONTROL
70
C564
X1
u-COM
E-VOL.
"C568
50 0.47 0V 71
3.0V TUNERIN IC TYPE
72
C205
XT2
2.2u50 0V or 5.0V
49 3.0V 5.0V 73
IN1L 49 XT1
+
74
TYPE
VDD0
C565 5.0V
75
R132
AVREF0
48 47u10 0V
2.2K
76
3.0V IN1COM
+ S-METER 5.0V
TYPE
0-4.0V 0V
C204 R133 12K
5.0V
N.
47 3.0V 2.2u50
0V 5.0V
IN1R 47 "C106
0V
+
5.0V
S
4.8V 46 3.0V 0V 5.0V
"R134
5.0V
IN2R 46
3.4V 0V
45 3.0V 2.2K 2.2-4.5V 77 0V TYPE RE
5.0V
IN2COM 45 77 NOISE
0V 5.0V
44 3.0V 5.0V CH-CO
"W578 0.6-4.1V 78
IN2L 44 0V
0V
PHONE 5.0V
43 3.0V N.
79
ACLOUT 0V
5.0V N.C
42 3.0V N.
80
ACLIN 0V
AVCONT
41 3.0V N.
ACROUT
AF
8.0V
W501
3.0V
C556
1000P
552
C562
.01
10u10
593
+
1
25
C560
100P
40
50
39
35
REAR Lch-
REAR R h
REAR Lch+
FRONT Lch-
FRONT Rch-
FRONT Lch+
+
FL-
"
RL-
FR-
FL+
RL+
6.2K
+
1u50
C257
R257
R21
33K
C251
C254
0.22u50
0.22u50
+
C256
W409
R261
"
"
"
"
D20
D251
D253
1K
4.7K
W162
4.7K
R251
R256
R254
W406
W405
"
"
"
"
"
+
1u50
750
R263
C258
R260
36K
R72
100K
10K
10K
10K
R30
R564
R563
6
8
10
12
14
16
18
20
22
24
R11
10K
R73
IN2
VCC1
VCC2
MUTE
PGND1
PGND4
ACGND
IN1
SGND
IN3
HSD
14
13
9
22K
R32
R201 47K
5
7
9
"
11
21
13
15
19
23
25
17
D40
VCC
C40 0.01
GND
1
2
3
12
5
10
6
4
11
7
8
D262
D268
D264
D265
D261
FL-
OUT3-
IN4
D266
D263
D267
RL-
OUT4- PGND3
FR-
OUT1-
SVR
FL+
OUT3+
RL+
OUT4+
FR+
OUT1+
RR+
OUT2+
0.01
100K
R415
C404
"
1
12
0.1
0.47
C586
C588
C587
"
0.01
+
C102
IN
OUT
GND
0.1
1
C589
W510
2
3
41
C103 0.1
"
59
58
57
56
55
54
50
D101
100K
100u6.3
R126
C101
R255 33K
R264 47K
R68 10K
R69 10K
R125 1K
R67 10K
R122 100
"
+
C584
10u10
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
NC
VDD
VSS
VOUT
67
66
65
64
63
62
61
DSI
N.C
N.C
3
2
4
1
60
PS2-1
PS1-1
BEEP
LO/EJ
PS1-2
PS2-0
PS1-0
SW5V
M-RST
MOSW
RESET
P-STBY
M-STOP
CD-SW3
M-MUTE
B.U-DET
ACC-DET
2.2M
R128
DEMGND
SMETERC
AMAGC2TC
FMDEMREF
AMMIX2OUT
AMIF2AMPIN
FMDEM AMIF2AMP REF
2.7K
R561
D202
D201
DIGVCC
TUNQUALITY
ISSTC
DEVTC
VREF3V
APGND
APVCC
ACRIN
PANEL
8EJE SW
N.C
AVSS
L-RST
L-CE
AVREF1
N.C
L-DATAL
CH-DATAC
CH-DATAH
CH-CLK
CH-REQH
N.C
31
32
29
30
33
35
36
38
39
40
34
37
1
2
3
4
5
6
7
8
9
11
10
12
13
15
16
18
19
20
14
17
+
1K
1K
1K
R102
FL
OUTFL
RL
OUTRL
FR
OUTFR
RR
OUTRR
R103
R104
C561
1u50
"
R105 470
C553
R121 2.2K
R107 2.2K
C554 0.1
"
14
R-DATA
15
R-QUAL
R106 100K
1
2
5
6
R413 100K
SCL
ACL
11
SDA
ADA
12
L-DATAS
13
L-CLK
"
16
17
18
19
L516
4.7uH
L515
4.7uH
U V W X Y
WHT GRN
8 9
FRONT L REAR L
WHT/BLK GRN/BLK
7 10
SIGNAL LINE
GRY/BLK VIOL/BLK
GND LINE
6 11
2 4 6 8 10 12 14 16
FUSE
FRONT R REAR R 1
B LINE GRY VIOL
1 3 5 7 9 11 13 15
5 12
IC1 : BLU
"
ANT. CONT
4 13
IC4 :
POWER "
BLU/WHT
SUPPLY IC6 : TDA7479AD P. CONT
3 14
OUT
(MULTI AVR) IC7 IC7 : BA4911-V4
RED
IC8 : HD74HC27FP ACC 2 15
0V 1
IC10 : TDA7513
GND
BLK YEL
IC11 : PST3435UL GND 1 16 BU
IC12 : BR24C01AF-W or
GND
"D13 14.0V 2
DC CORD
M24C01-WMN6T or
P-CON
S-24CS02AFJ-TB (E30-4784-05)
KDC-222/222S/2023/3023
Q10,20,70,101,201,503
"D11 14.0V 3
: 2SC4081
P-ANT
8.1V 4 Q40 : DTA124EUA
FM+B
Q50 : 2SA1036K
C52
TEL
Q51,53 : UMC2N
10u16
MUTE
Q55 : 2SD2375
+
7.9V 5
0 AM+B Q102 : DTA114YUA
7 5 3 1
Q51 C53
Q223,224 : DTC143TUA
SERVO B
1
10u16
Q251 : DTC114YUA
AVR 8 6 4 2
0 2
" A +
CONTROL 8.1V 6 Q252 : UMG4N
P.CON
AUDIO+B
Q253 : UMA1N
C54
10u16 Q501 : CPH5905
SERVO 7 5 3 1
L2
Q502 : 3SK126
+ A
"R31 AVR 14.3V 7
VCC 8 6 4 2
47K
27uH
Q55
D51
D1 : S2V20
"A or
1N5393G-M6
C63
D3 : IMSA-6801
22u16
D10,20,70,201,202,401,
+
5.0V 8
BU5V 402 : MA4068(N)-M
W532 D11,13 : D1F60
C57 D12,14 : AM01Z
Q50
220u16
5.0V 9 D40,101,251-253
VBU
+ : 1SS133
VDD 7
SW
5 D50 : DAN202U
5V
D50
3
D51 : MA4082(N)-L
1 10
SW1 D103 : DA204U
YEL BLK
VDD 4
D106,108,109,403-405, 16 1
3 RED
407-410 : MA4062-L
11 15 2
1
SW2
D110 : HZS12A2
10.3V 12 BRN BLU/WHT
TEL MUTE
ILLUM D411 : MA3062WA 14 3
C56
D501,503 : RN739F
3
10u50
BLU/WHT
D504-506 :
" ANT. CON
13 4
+
P. CON
VIOL GRY
RR+ 12 5 FR+
"Q53
VIOL/BLK GRY/BLK
RR- 11 6 FR-
GRN/BLK WHT/BLK
RL- 10 7 FL-
GRN WHT
RL+ 9 8 FL+
R145
CN1
2.2K
DC CORD
54 22 SW3
(E30-4790)
21 SERBOGND
R101
KDC-2024SA/SG/SYA/SYG
D102
240 20 SERBO+B
KDC-2094YA/YG
55 19 MO SW
(X25-96XX-XX)
" B Q101
56 18 LO/EJ
MODEL UNIT C51, C227,
DSI A E B D C F C106 C256 C521 C522 C523 C524
47 17 Rch NAME 404 228
No.
DRIVER
KDC-222 (K)
16 GND
5.0V 00-12 NO YES NO NO 1500P NO 100u50 0.1 33P 27P 100P
KDC-222S (K)
0V 49 15 Lch
5.0V
KDC-2023 (M)
0V 14 AUDIO+B 00-22 NO YES YES YES 1500P NO 33u50 0.1 33P 27P 100P
KDC-3023 (M)
4
40
57 13 M STOP
KDC-2024SA (E)
SVR 40
R259 22K
39 58 12 M RST KDC-2024SG (E)
P-MUTE 39 12-75 NO YES NO NO 1000P YES 100u50 0.1 33P 27P 100P
R144 100K KDC-2024SYA (E)
to
5.0V ADJ 11 N.C
R108 R174
KDC-2024SYG (E)
0V MECHA
38 2.2K 47K 59 10 M MUTE
KDC-2094YA (E)
N.C
12-74 NO YES NO NO 1000P YES 100u50 0.1 39P 15P 100P
9 D GND
R117 KDC-2094YG (E)
37
CLK 37
8 BU 5V
1K
R118 10K
UNIT C528, C529,557, C537, CF52,
C526 C530 C536 C541 C553 C568 C581 C587 CN3
5.0V R115 7 N.C
36
589 558,590,592 538 53
No.
DATA 36
0V
1K
R116 10K 2 6 MECHDET
00-12 5P YES NO 4P 4P 8P 4P 0.01 820P 2P 0.01 L72-0781-05 NO
35
36 5 MSDA
MUTE 35
W165
00-22 5P YES NO 4P 4P 8P 4P 0.01 820P 2P 0.01 L72-0781-05 NO
R119 47K
37 4 MSCLK
5.0V
0V
"R112 0.1 64 3 SW1
34
TUNER-TYPE0 R141 4.7K
12-75 5P YES NO 4P 4P 8P 4P 0.047 820P 2P 0.01 L72-0716-05 NO
2W
0V or 5.0V
66 2 SW2
R114 47K
R143 4.7K
1 D OUT
33 0V
Vss1 12-74 NO YES NO 8P 2P 10P 1P 0.047 820P 2P 0.01 L72-0716-05 NO
"R111 0.1
32
TUNER-TYPE1
2W
UNIT D11, D13,14,
D108 D109 D504-506 IC1 IC4 J3 L505
D103
R113 47K 12 106,110 5
No.
"J3
"R139 47K
31 "D110 00-12 NO YES NO NO KV1720S UPD780058GC501 TDA7386 E58-0879-05 L31-0967-05
TYPE0
1 D-GND
"R140 47K
"W404
R163 10 00-22 YES YES YES NO KV1720S UPD780058GC499 TDA7560 E58-0879-05 L31-0967-05
V or 5.0V
2 PAN5V
"R137 47K
30
"Q102
TYPE1 3 ILL-GND
"R138 47K
4 LAMP+B 12-75 YES YES NO NO KV1720S UPD780058GC499 TDA7386 E58-0879-05 L31-0967-05
PANEL5V
"R135 47K SW 5 LED+B
V 29
TYPE2
R169 1K
28
"R136 47K 60 6 RST
12-74 YES YES NO NO KV1735S UPD780058GC503 TDA7386 E58-0879-05 L31-0968-05
N.C
0V "R168 1K
V 5 7 L-RES
27 R110 4.7K
SD 55
R167 100
UNIT Q40, Q252, R25, R28, R31, R67,137,170, R102,111,112,134,
26 5.0V 11 8 L-DATAL L506 L507 Q53 Q251
102 253 136 521 32,140 171,412-414 142,168,173,529
X16- No.
TYPE REF
25 J1
CH-CON
00-12 L31-0970-05 L32-0933-05 YES NO YES NO NO YES NO NO NO
24
N.C
2/2
23
00-22 L31-0970-05 L32-0933-05 YES YES NO NO YES YES NO YES NO
N.C
R166 1K
22
R58 6 9 L-CE
N.C
21 470 A
R165 470
AFS 59
13 10 L-CLK
12-75 L31-0970-05 L32-0933-05 YES NO YES NO YES YES YES NO NO
R164 470
5.0V
12 11 L-DATAS
0V
6
"R170 1K
61 12 REMO 12-74 L31-0971-05 L32-0934-05 YES NO YES NO YES YES YES NO NO
"R171 47
"R412 100K
13 SW5V
1 UNIT R138,251- W160, W410,
W400- W405-
R135 R139 R258 R261 R263 R526 W524 WH1
R172 1K 254,256,260 161 404 409 578
No.
14 PANEL
00-12 YES YES YES 100 430 180K 5.6K YES NO NO NO YES NO
15 ESD-G
25
00-22 NO NO YES 220 10 4.3K 5.6K NO NO YES NO YES NO
P1
12-75 NO YES NO 100 430 180K 5.6K NO NO NO YES YES NO
KDC-222/222S/2023/3023
KDC-2024SA/SG/SYA/SYG 12-74 NO YES NO 100 430 180K 5.6K NO NO NO YES YES NO
KDC-2094YA/YG (1/2)
7
CAUTION : For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts list).
!
Indicates safety critical components. To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out
(exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer.
" DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual instruments
or/and units.
B.U.
ACC
GND
P-ANT
P-CON
REAR Lch-
REAR Rch-
REAR Lch+
REAR Rch+
FRONT Lch-
FRONT Rch-
FRONT Rch+
L1
R28
4.7K
D14
C50
+
FL-
"
RL-
FR-
FL+
RR-
RL+
FR+
RR+
140uH
"
W410
10u25
D12
C51
R25
4.7K
+
10u25
"
"
"
"
FL-
RL-
FR-
FL+
RR-
RL+
FR+
RR+
22K
R32
ACC
R57
1.5K
+
+
D1
C1
C58
GND
B.UP
100u16
3300u16
+
C55
10u25
R51
47K
R50
5.6K
41
R255 33K
R264 47K
41
P-STBY
4.7K
R142
"
0.1
C142
47K
10K
D109
D106
"
"
CH-REQH
N.C
19
20
19
D108
"
Z AA AB AC AD
1
SWITCH UNIT (X16-1460-xx/2370-12)
(B38-1080/1081/1126-05) : KDC-4023/202MR/2024SA/2024SG/2024SYA/2024SYG/2094YA/2094YG/2022/2022V/2023/3023/RX-491CD/RY-391CD (B38-107
2
3
IC2
J1
TP35
REMOTE
ESD-GND 15
SENSOR
TP34
PANEL-
14
SW
4
TP24
"R13 47 KEY DETECT
SW5V 13 +5V SW
TP9 TP8 TP7 TP6
TP33
R12 1K
Q1
" A
REMO 12
10K
TP27 TP11
R2 470
49
L-DATAS 11 80
KS6
X14- 10K
KI1
TP28
IC2
TP1
J3 R4 470
50
L-CLK 10 79
KI1 KI1
TP29
TP2
5V
1/2 R3 470
51
L-CE 9 78 KI2 KI2 0V
32
TP3
TP30
52 S32 S32
R5 1K
KI3 KI3 31
A L-DATAL 8 77
S31 S31
TP4
TP12
53 30
N.C 7
RST KI4 KI4 S30 S30
29
TP5
54 S29 S29 KI2
S17
KI5 KI5 28
TP32
0V 0V 55 S28 S28
RST 6 TEST 27
56 S27 S27
TP26
IC1
+5V VDD 5.0V 26
S26 S26
LED+B 5 +B
C3 0.047
57
25
VDD2 3.3V
LCD DRIVER S25 S25
5 LAMP+B 4
R21 R22
24
TP21 "D19 C2 0.047
58
220 220 S24 S24
TP13
VDD1 1.7V
ILL-GND 3 23
0V 59
S23 S23
VSS
TP31
22
R10 4.7 KI3
R8 56K
S22 S22
PAN 5V 2 +5V
21
TP22 C1
60 1.7V S21 S21
"D8 "D7 R16 OSC 20
0V
D-GND 1
510 S20 S20
1000P
61
19
77 L-DATAL 5V
S19 S19
"C6 0.01 62
0V
18
78 L-CE
S18 S18
63
5V
"D11 "D17 "R19 17
79 L-CLK
TP14
0V S17 S17
64
80 L-DATAS
KI4
"D3 "D2 "D1 R14 "D22
330
"D6 "D5 "D4 R15
330
5V
"C7 0.01
0V
TP15
"D10 "D18 "R20
6 KI5
"D20 "D9 R17
510
"D12 "D13 R18
510
CAUTION : For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts list).
!
Indicates safety critical components. To reduce the risk of electric shock, leakage-current or resistance measurements shall be
7
carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer.
" DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual
instruments or/and units.
S5
S8
S9
S6
S7
S21
S31
S11
S22
S12
S32
S30
S29
S28
S27
S17
S18
S20
S26
S25
S24
S23
S19
S14
S13
S15
S16
S38
S35
S33
S36
S34
S37
S40
S39
S10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
ED1 (SEGMENT)
ED1 (COMMON)
C1
C2
C3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
ED1 (COMMON)
ED1 (SEGMENT)
2.2
C5
"
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
+5V
S40
S40
S39
S39
S38
S38
S37
S37
S36
S36
S35
S35
S34
S34
S33
S33
KS2
KS2
KS5
KS5
KS3
KS3
KS4
KS4
N.C.
COM1
C1
COM2
C2
COM3
C3
GND2
OUT
GND1
VCC
3
2
4
1
(BOTTOM VIEW)
C9
C4
0.01
0.01
R7
4.7K
+B
KEY
N.C.
N.C.
N.C.
1
2
3
5
6
8
9
4
7
11
10
12
13
15
16
14
S11
S11
S5
S5
S6
S6
S8
S8
S9
S9
S7
S7
S12
S12
S10
S10
S13
S13
S14
S14
S15
S15
S16
S16
AE AF AG AH AI
1
(B38-1079-05) : KDC-1023/1023S/122/122S/222/222S
2
3
TP19
S1 IC1 : LC75853NE D1-13,20 :
" GND LINE
4
IC2 : RS-171 D17,18 :
"
+B B LINE
TP16 TP17 TP18
D19 :
"
S25 S14 S13 S2
Q1 : DTA114EUA D22 : MA3062WA
TP11 ED1 :
"
4 3
KI1
UNIT C6, R19,
MODEL NAME
S3 A C5 D1-13,20 D17,18 D19 D22 R13
No. 7 20
B30-1564-05 or
B30-1533-05
RX-491CD (J) X16-1460-01 YES YES YES B30-1642-05 B30-1633-05 NO YES 390
S24 S15 S12 S4
(GREEN)
(BLUE)
B30-1533-05 B30-1533-05
RY-391CD (J) X16-1460-03 NO NO NO B30-1633-05 NO NO 510
TP12
(GREEN) (GREEN)
5 2 VOL+
B30-1564-05 or
KI2 B30-1533-05
KDC-4023 (M) X16-1460-11 YES YES YES B30-1642-05 B30-1633-05 YES YES 390
(GREEN)
S22 S5
(BLUE)
B30-1533-05 B30-1533-05
KDC-202MR (K) X16-1460-12 YES YES NO B30-1633-05 YES YES 510
(GREEN) (GREEN)
S23 S16 S11 S6
KDC-1023 (M) B30-1533-05 B30-1533-05
X16-1460-13 NO NO NO B30-1633-05 YES NO 510
5
KDC-1023S (M) (GREEN) (GREEN)
TP13
FM 6 1 VOL- KDC-2024SG (E)
B30-1533-05 B30-1533-05
KDC-2024SYG (E) X16-1460-14 NO YES NO B30-1633-05 YES YES 510
KI3 (GREEN) (GREEN)
KDC-2094YG (E)
S26 S9 S7
B30-1564-05 or
B30-1567-05
KDC-2022V (K) X16-1460-15 YES YES YES B30-1642-05 B30-1633-05 YES YES 390
(RED)
(BLUE)
S27 S19 S10 S8
KDC-2024SA (E)
B30-1567-05 B30-1567-05
KDC-2024SYA (E) X16-1460-16 NO YES NO B30-1633-05 YES YES 510
(RED) (RED)
TP14
KDC-2094YA (E)
AM TI ATT SRC
B30-1533-05 B30-1533-05
KI4 KDC-2023 (M) X16-1460-20 YES YES NO B30-1633-05 YES YES 510
(GREEN) (GREEN)
S20
B30-1567-05 B30-1567-05
KDC-3023 (M) X16-1460-21 YES YES NO B30-1641-05 YES YES 510
(RED) (RED)
B30-1567-05 B30-1564-05
S21 S18
KDC-2022 (K) X16-2370-10 YES YES YES B30-1633-05 YES YES 390
(RED) (BLUE)
KDC-122 (K) B30-1567-05 B30-1567-05
X16-2370-11 NO NO NO B30-1633-05 NO NO 510
TP15
(RED) (RED)
KDC-122S (K)
AUD CLK
KDC-222 (K) B30-1567-05 B30-1564-05
KI5 X16-2370-12 NO YES NO B30-1633-05 YES YES 510
6
KDC-222S (K) (RED) (BLUE)
KDC-2022/V/202MR/4023 (2/2)
KDC-122/S/1023/S (2/2)
KDC-222/S/2023/3023/2024SA/SG/SYA/SYG/2094YA/YG (2/2)
RX-491CD/RY-391CD (2/2)
7
S5
S8
S9
S6
S7
S21
S31
S11
S22
S12
S32
S30
S29
S28
S27
S17
S18
S20
S26
S25
S24
S23
S19
S14
S13
S15
S16
S38
S35
S33
S36
S34
S37
S40
S39
S10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
ED1 (COMMON)
C1
C2
C3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
ED1 (SEGMENT)
KS2
KS3
KS4
KS5
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