Kenwood KDC-105, KDC-126 Schematics

A B C D E

0

3

2

X

7

W509

5

4

5

4

7

KDC-105,126/126S

1

REQ H

R404 100

19

L4

∗

C522

33P

11

1K

R173

CH CON

R405 4.7K

D405

D3

GND

D GND

25

D410

C594

∗

C523

∗

R543

5.6K

MPX
BUFFER

C352

0V

CHANGER CONNECTOR

J4

51

2

3

BU

4

Rch

MUTE

A GND

R402 10

R403 4.7

R406 4.7K

1

+

+

1u50

C402

C403

100u10

45

46

D402

R501 6.8K

L502
33uH

C516 10P

100K

∗

∗

L505

∗

C526

C529

C502

∗

2P

D408

D501

∗

C530

L501

6.8uH

D403

R521

∗

48P

D504

27P

100K

R522

14

6P

C528

∗

∗

L507

C545

6800P

R541

Q503

1K

R542 4.7K

330P

5.0V
0V

R351 2.2K
R352 2.2K

5.0V
0V

2.4V

+

2.4V

5.0V

+

0.01

C354

1
2

3
4

5

6
7
8

15
14

C351

10u6.3

C353

10u6.3

RDS
DECODER

1096

117

128

RST

R407 4.7K

W521

4P

W401

∗

4P

C541

C542

22P

R544

2.2K

51

IC6

QUAL
RDDA

VREF
MPX

OSEL

GND
ARI
FILOUT

W530

13

DATA C

8

R524

C543

C544

Q201

R409 4.7K

C401

16

D401

D411

C504

0.01

C503

C507

33u10

FM RF
AMPLIFIRE

R523

C531

100K

68P

15P

NOISE
BUFFER

77

DATA H

Lch

R401 10

R410 100

+

1u50

17

44

AM RF
AMPLIFIRE

R502

2.2K

0.1
C505

4.7u16

0.1

C506

+

C591

33u10

100K

Q502

1

W533

W500

17

18

20

5.0V
0V

RDCL

OSCOUT

OSCIN

EXTRES

FSEL

D409

T57

VCC

R503

2.2K

TM

ELECTRIC UNIT
(X34-31xx-xx)

2

D407

∗

ANT.

C

J1

3

C524

∗

C525

∗

D503

4

5

∗

CN3

∗

C521

W505
W507

D506

2

∗

1

6

0.01

C557

∗

∗

7

C558

0.01

CLK

REQ C

R411 100

R408 4.7K

18

+

R506

+

∗

L506

C533

0.01

R525

∗

R204 W512

1K

R205 4.7K

∗

W402

16
15
14

13

4.332MHz

5.0V

12

0V

11

0V

10

0V

9

DAUGHTER UNIT

(X89-2590-10)

CN91

Q221,222
Q225

63

D404

Q501

1M

C508

22u10

1mH

L503

C534

C535

W415

W504

∗

∗

W403

62

R353

2.2K
C356

10P

X2

C355

10P

Q221,222

AUDIO Q222Q221
MUTE
SW

AUDIO
MUTE
DRIVER

Q225

22K

123 4

:
:

C509

+

1K

R505

W601

0.01

C536

∗

2P

R528

100K

R527

100K

E

57

61

PRE OUT

12

R225

100

30K

R229

270

4.7K

R221

+

C221

10u16

22K

DTC143TUA
DTA124EUA

L504

100uH

68P

100P

C510

R507 1K

L513

4.7uH
L512

4.7uH

10

R526

5.6K
12

∗

W524

13

∗

R529

330

D505

15

FRONT

W102

3

7
6

8

20

R226

30K

4.7K

W101

W531

C222

3

R230

R222

10u16

5

C555

100

270

+

∗

17
18

1000P

CN90

WH1

C511

0.01

L510

4.7uH

C512

4.7u16

3

6
7

8

10
11
12

13
14

15

C600

+

C513 0.01
C514 0.01

C515 1

∗

C537

∗

C538

W523

R547 22

+

100u10

5
4
3

2
1

L517

4.7uH
C546

0.01

W160

∗

5.0V

60mV

0.7V

8.0V

3.2V

3.8V

8.0V

0V

0V

0V

0V

W534

∗

W508

∗

J5

Q40

22K

1

2
3

4
5

6
7

8
9

10

11

12
13

14
15
16

17
18

19
20

D

PRE OUT

∗

C227
680P

100

R231

R227

30K

4.7K

270

R223

+

C223

10u16

22K

12

L508

8.0V

8.0V

79

80

IFVCC

MIX1OUT1

VREF5V
TUNGND

AMMIX1IN+
AMMIX1IN­ANAGC1TC

ANAGC1OUT
ANAGC1VOUT

FMMIX1IN1
RFGND

FMMIX1IN2
FMAGC1OUT
FMAGCIN

FMAGCVOUT
FMANTADJ

FMRFADJ
OSCGND

VCOE
VCOB

OSCVCC

LFOUT

REAR

∗

C226

680P

R228

30K

Q224Q223

4.7K

W516

MUTE

MUTE
DRIVER

CF51

10.700MHz

8.0V

0V

77

78

MIX1OUT2

AM
FM

FM
AM

AM

AM
PW-ON

AM

FM0V2.0V

PW-ON0V2.8V

R232

R224

C224

10u16

R581

C581

∗

3.5V

76

IF1GND

3.3V

2.0V
0V

2.4V
0V

C547

10u10

C550

0.033

FR

FMNAGCIN

4.2V

3.3V
0V

3.4V
0V

+

1K

100

270

+

W161

FL

74

75

FMIFAMP1IN

4.1V

3.2V
0V

4.2VAM

LFREF

21

2.5V

C548 0.022

RL

RR

C580

0.01

0.1

C582
73

FMIFAMPREF

FMIFAMP1OUT

AM
FM

LFIN

22

2.5V

R546

R545

4.3K

C549

2200P

L511

4.7uH

2.5V

33K

C252

0.22u50

C253

0.22u50

8.0V

72

TUNVCC

PLLGND

LFHC

0V

∗

W156

C585

0.01

CF52

∗

10.700MHz

3.2V

2.0V
0V

2.4V

0.8V

PLLVCC

252423

8.0V

L514

IC4

∗

W

∗

R2

4.

∗

W

∗

R2

4.

CF53

∗

4.0V

70

71

FMIFAMP2IN

FMAMP2OUT

FM

26

10.

4.7uH

0.01

C551

10.700MHz

XTALG

16

X34-3110-xx (1/4)

JIHGF

0V

V

0

24

15

TUNVCC

RK

KDC-105,126/126S

W156

C252

0.22u50

C253

0.22u50

CF52

∗

PLLGND

∗

IC4

∗
∗

∗
∗

C585

0.01

10.700MHz

71

FMIFAMP2IN

3.2V

2.0V
0V

2.4V

0.8V

PLLVCC

25

8.0V

L514

4.7uH

C551

W407
R252

4.7K
W408
R253

4.7K

CF53

∗

4.0V

70

FMAMP2OUT

XTALG

26

0.01

41

+

1u50

C255

0V

14.4V

4.9V

4

2

VCC1

STBY

PGND2

TAB

1

0V

CF54
450kHz

W509

W511

C583 0.1

10.700MHz

L509

4.2V

4.2V

68

69

AMMIX2IN1

AMMIX2IN2

AM

2.0VFM

FM

0V

IC10

TUNER &
E-VOL.

3.4V 4.8V

X501

3.4V0V

DIGGND

XTALD

29

28

27

0V

8.0V

C552

0.0110.250MHz

C593

1

L515

4.7uH

0V

PGND1

3

7.3V

D268

IN

1

8.0V

AM

TUNQUALITY

DIGVCC

30

∗

C256

∗

7.2V

1086

OUT2-

RR-

OUT

2

ISSTC

31

C553

+

SVR

D264

3

67

∗

Q251

47K

10K

1K

R256

∗

OUT2+

5

7.4V

D265

RR+

GND

W510

C584

AMMIX2OUT

1.4V

1.2V
0V

3.7V
0V

FM

DEVTC

32

33

3.2V

3.0V

C561

1u50

C554 0.1

40

W162

C254

0.22u50

4.7K

R254

W406∗W405

∗

∗

7.2V

12

OUT1-

OUT1+

9

7

11

7.3V

7.2V

7.2V

D262

FR-

FR+

0.1

C586

C587

∗

+

4.7u16
64

65

66

AMAGC2TC

AMIF2AMPIN

FMDEM AMIF2AMP REF

5.0V
0V

FM 2.6V

0V

APGND

VREF3V

35

34

8.0V

0V

C556

1000P

+

C562

10u10

+

L516

4.7uH

C560
100P

IN2

SGND

IN1

13

0V

0V

DEMGND

SMETERC

OUTRR

APVCC

3.9V

RR

C251

0.22u50

4.7K

R251

∗

7.2V

14

IN4

OUT3+

IN3

15

17

7.3V

7.2V

FL+

0.47

C588

616263

TUNER
CHANGE

FMDEMREF

FM
AM

AM
PW-ON

OUTFR

OUTRL

383736

3.9V

3.9V

RL

FR

R261

∗

W409

∗

D266

OUTFL

39

3.9V

FL

R260

∗

C258

OUT3-

19

7.3V

FL-

ACRIN

40

3.0V

50

R263

∗

750

+

1u50

0V

7.3V

14.4V

201816

VCC2

PGND3

ACGND

OUT4+

21

7.4V

D261

D263

RL+

Q252,253

SMETERRC &
MPTHTC SW

5V
0V

4.2V

AUDIOMUTE

2.4V
0V

4.0VFM
0V

5V
0V

3.0V

1.9V

FMMUTETC

0V

TUNEROUT

3.0V

3.0V

W501

+

1u50

C257

OUT4-

HSD

25

23

7.4V

D267

RL-

MPTHTC

RDSMUTE

QUALITY

SMETER

SCL

5V
0V

SDA

TUNERIN

IN1L

IN1COM

IN1R

IN2R

IN2COM

IN2L

ACLOUT

ACLIN

ACROUT

D253

∗

SD

39

F

R257

D251

3.4V or

4.1V

22

C589

∗

4.4V

60
59
58
57

56
55

54

53

52
51

50

49

48

47

46
45
44
43
42
41

6.2K

D252

0V

24

MUTE

PGND4

POWER
AMPLIFIRE

0.1

∗

R565 100K

3.9V

C564

0.47

3.0V

C565

47u10

+

3.0V

3.0V

3.0V

3.0V

3.0V

3.0V

TH1
470

C590

0.1

W519
W517

R567

1K

R566

1K

C563

0.47u50
+

∗

Q253

R561

D201D202

46
45
44

W158

∗

∗

C592

2.7K

C205

2.2u50
+

C204

2.2u50
+

R258

0.01

∗

SCL

SDA

Q252

∗

C568

E2P-ROM

35

58

5.0V
0V

R102

∗

5.0V
0V

Q20

57

M-RST

M-STOP

L-RST

5

1K

5

5.0V
0V

R20

3.3K

1/2W

R21

33K

D20

R22
10K

C21

0.01

A. C. C
DETECTOR

R23 R12

100K 100K

56

55

R122 100

55

56

54

LO/EJ

MOSW

5.0V
0V

5.0V
0V

5.0V
0V

N.C

AVREF1

L-CE

ADA

9

876

5.0V

1K

R103

6

SDA

54

CD-SW3

IC12

1

A0

2

A1

3

A2

0V

4

GND

5.0V

R201 47K

12

D40

IC8

MUTE
LOGIC

0V

0.01

C404

∗

1

8

R123

IC11

59

57

55

51

49

47

VCC

WP

SCL

SDA

5.0V
0V

13

14

VCC

1

2

100K

R415

1K

5.0V 0V

61

61
62

63

64

66

R133 12K

∗
∗

77

∗

8
7

6

5

0V

C102

1

2

VDD

3

4

2.2M

R128

∗

R414 100K
R129 2.2K

R130 2.2K

C104

15P

C105

15P

R132

2.2K

C106
R134

2.2K

W578

0V

VOUT

VSS60NC

5.0V
0V

12

0.01

D101

0V

5V
0V

5V
0V

C101

R126

POWER
ON
RESET

X1

4.194MHz

2.2-4.5V3.0V

0.6-4.1V

5.0V
0V

ADA

10K

R564

10911

543

0V

+

100u6.3

100K

R127

2.2K

5.0V

R131

6.8K

5.0V

ACL

C103 0.1

0V

0V

R563

61

62
63

64
65

66
67
68

69

70

71
72
73
74
75
76

77
78

79
80

10K

0V

6

5.0V

SCL

SDA

8

GND

7

0V

L101

4.7uH

REMO

R-CLK
CH-REQC

CD-SW1
KEY-REQ

CD-SW2
Vss0
VDD1

X2

X1
IC
XT2
XT1
VDD0
AVREF0
S-METER

0-4.0V

NOISE
PHONE

N.C
AVCONT

5.0V
0V

C40 0.01

5.0V
0V

PANEL

1

1

5.0V
0V

60

2

595758

CP3
1Kx2

R125 1K

59

RESET

M-MUTE

5.0V
0V

5.0V
0V

5.0V
0V

N.C

8EJE SW

3

4

0V

2

AVSS

CP2

2.2Kx2

515253

N.C

N.C

5.0V
0V

∗

IC1

SYSTEM
CONTROL
u-COM

5.0V
0V

L-DATAL

ACL

11

10

1K

R104

SCL

R10
30K

SURGE
DETECTOR

Q70

R73

R11

10K

Q10

B. U.
DETECTOR

50

CP1
10Kx2

49

50

DSI

BEEP

5.0V
0V

5.0V
0V

R105 470

R106 100K

11

D70

100K

48

PS2-1

PS2-0

5.0V
0V

or 0V

5.0V
0V

L-DATAS

12

13

R107 2.2K

R121 2.2K

12

D1

36K

R72

R67 10K

∗

47

0

L-CLK

14

13

PS1-2

R-DATA

14

X34-3110-xx (2/4)

17

K L M N O

R

(

D

11

K

R

KDC-105,126/126S

R10
30K

URGE
ETECTOR

70

D70

73

100K

10

0

.

ECTOR

D10

R72

DC CONNECTOR

J2

4286

REAR Lch-

REAR Rch-

REAR Lch+

FRONT Lch-

FRONT Rch-

FRONT Lch+

FL-

RL-

FR-

FL+

RL+

R71
82K

36K

TEL
MUTE

10K

R30

C30

0.01

D30

∗

A

∗

R31

22K

R32

47K

∗

W532

SW
5V

7513

FRONT Rch+

RR-

FR+

Q51

D51

Q50

P-ANT

REAR Rch+

RR+

R57

R51

R50

5.6K

1210 14 16

P-CON

1.5K

47K

13 15119

ACC

PHONE

C63

22u16

+

(F1 10A)

FUSE

GND

SERVO
AVR
CONTROL

SERVO
AVR

Q55

L1

B.U.

140uH

GND

R25

∗

C52

10u16

C53

10u16

C54

10u16

C56

10u50

4.7K

+

+

+

+

IC1

POWER
SUPPLY
(MULTI AVR)

R28

4.7K

D14

C50

∗

∗

D13

∗

D12

C51

+

∗

D11

10u25

∗

∗

L2

27uH

+

D1

C1

C58

3300u16

+

C57

C55

10u25

220u16

+

D50

∗

Q53

VDD

VDD34

10u25

W410

∗

100u16

+

14.0V

14.0V

8.1V

7.9V

8.1V

14.3V

+

5.0V

5.0V

10.3V

IC7

0V

1

GND

2

P-CON

3

P-ANT

4

FM+B

5

AM+B

6

AUDIO+B

7

VCC

8

BU5V

9

VBU

7
5
3

10

1

SW1

11

1

SW2

12

ILLUM

IC4
IC6
IC7
IC8
IC10
IC11
IC12

Q10,20,70,101,201,503
Q40

Q50
Q51,53
Q55
Q102
Q223,224
Q251
Q252
Q253
Q501
Q502

D1
D3
D10,20,70,201,202,401,

402
D11,13
D12,14
D40,101,251-253

D50
D51
D103
D106,108,109,403-405,

407-410
D110
D411
D501,503
D504-506

SIGNAL LINE
GND LINE

B LINE

:

∗

:

∗

TDA7479AD

:
:

BA4911-V4

:

HD74HC27FP
TDA7513T:
PST3435UL:
BR24C01AF-W or:
M24C01-WMN6T or
S-24CS02AFJ-TB

2SC4081:
DTA124EUA:
2SA1036K

:

UMC2N:
2SD2375:
DTA114YUA:

:

DTC143TUA

:

DTC114YUA
UMG4N:

:

UMA1N
CPH5905:
3SK126:

1N5393G-M6

:

IMSA-6801

:
:

MA4068(N)-M
D1F60:
AM01ZNF:

1SS133:
DAN202U:
MA4082(N)-L

:

DA204U:
MA4062-L:

UDZS12B:
MA3062WA

:

RN739F:
KV1720S:

REAR L

REAR R

GRN/BLK

GRN

VIOL

VIOL/BLK

98

116

125

107

134

BLU

GRY

WHT

GRY/BLK

WHT/BLK

FRONT L

FRONT R

ANT. CONT

DC CORD
(E30-6322-05)

KDC-205/CR
KDC-105/126/126S
KDC-2026/3026/226

TEL MUTE

YELBLK

BRN

143

RED

BLU/WHT

OUT

P. CONT

152

ACC

GRN

161BU

89

WHT

GND

GRN/BLK

VIOL/BLK

10
7

GRY/BLK

WHT/BLK

116

P1

0Kx2

5.0V
0V

5.0V
0V

49

48

PS2-1

PS2-0

5.0V
0V

or 0V

5.0V
0V

L-DATAS

12

13

R107 2.2K

R121 2.2K

12

R67 10K

∗

47

PS1-2

0V or 5.0V

L-CLK

R-DATA

14

14

13

R68 10K

PS1-1

R-QUAL

15

15

R69 10K

444546

PS1-0

ACC-DET

5.0V
0V

CH-DATAC

16

R413 100K

∗

16

43

B.U-DET

5.0V
0V

CH-DATAH

17

42

SW5V

0V or 5.0V

5.0V
0V

5.0V
0V

CH-CLK

18

181917

R255 33K

41

19

41

R264 47K

SVR

P-MUTE

P-STBY

5.0V
0V

CLK

5.0V

DATA

0V

MUTE

5.0V
0V

TUNER-TYPE0

Vss1

TUNER-TYPE1

TYPE0

TYPE1

TYPE2

TYPE REF

CH-CON

AFS

CH-REQH

N.C

20

25

∗

N.C

N.C

SD

N.C
N.C
N.C

D102

B

5.0V
0V

∗

R101

240

40

R259 22K

39

2.2K

38

R117

37

1K

R115

36

1K

35

0V or 5.0V

34

0V

33
32
31

30

29
28

R110 4.7K

27

5.0V

26
25
24
23
22

R58
470

21

R412 100K

DSI
DRIVER

ADJ

R118 10K

R116 10K

R119 47K

5.0V
0V

Q101

5.0V
0V

40
39

R174R108

47K

37

36

35

R114 47K

R113 47K

∗

R139 47K

∗

R140 47K

∗

R137 47K

∗

R138 47K

∗

R135 47K

∗

R136 47K

55

59

C142

R145

CN1

2.2K

54 SW322

55
56

47

49 Lch15

57
58

R144 100K

59

2

36 MSDA
37 MSCLK4

64

R141 4.7K

66

R143 4.7K

0.1

D103

∗

∗

W404

D110

∗

Q102
PANEL5V

47K

10K

SW

60

5

11

D109∗D106

∗

6
13 L-CLK
12

61

1

∗

R175

∗

∗

∗

D108

10K

R170

1K

R171

47

R172

1K

D111

∗

R169 1K

∗

R168 1K
R167 100

R166 1K
R165 470
R164 470

4.7K

R142

∗

W165

R163 10

∗

R176

1K

20
19

14
13

8

6
5

1
2

3
4
5

11

12

13

SERBOGND21
SERBO+B
MO SW
LO/EJ18
Rch1617
GND

AUDIO+B
M STOP
M RST12

N.C1011
M MUTE
D GND9
BU 5V

N.C7
MECHDET

SW13

SW22
D OUT1

∗

J3

D-GND
PAN 5V

ILL-GND
LAMP+B
LED+B

RST6
L-RES87
L-DATAL

L-CE109

L-DATAS

REMO

SW5V
PAN EL14

ESD-G15

P1

∗

WH2

to
MECHA
(X32- : CN2)

X16­J1

2/2

A

WIRED REM.

18

X34-3110-xx (3/4)