Kenwood KDC-1028-Mk2 Service Manual

CD RECEIVER

KDC-1028/128/128CR/128/L4
/129/129S/229
KDC-2031SA/SAY/SG/SGY

SERVICE MANUAL

SWITCH UNIT (X16) TYPE 2

Illustration is KDC-1028

VOL

AUD

SET UP

FF

SCAN RDM REP

© 2005-4 PRINTED IN JAPAN
B53-0270-00 (N) 1708

/

AUTO

AME

This service manual handles only switch unit (X16) for type 2.
Besides, please refer to the service manual of each model.
Switch unit (X16) has been changed from the following serial number to type 2.
Following system microcomputer (IC1:X34) also changes at the same time as changing
switch unit (X16).

MODEL SERIAL No.

KDC-1028 50106801~ X16-3270-10 X34-3410-11 784225GC283A TDF-51DB/O Y33-2260-63
KDC-128 50200001~ X16-3270-10 X34-3410-12 784225GC283A TDF-51D/O Y33-2260-64
KDC-128CR 50200501~ X16-3270-10 X34-3410-12 784225GC283A TDF-51DCR/O Y33-2260-65
KDC-128/L4 50200001~ X16-3272-71 X34-3410-12 784225GC283A TDF-128/L4O Y33-2260-11
KDC-229 50200001~ X16-3270-21 X34-3650-24 784225GC283A TDF-229/O Y33-2270-65
KDC-129 50200001~ X16-3270-21 X34-3650-25 784225GC283A TDF-229/O Y33-2270-65
KDC-129S 50200001~ X16-3270-21 X34-3650-25 784225GC283A TDF-129S/O Y33-2270-66
KDC-2031SA T0100401~ X16-3272-71 X34-3412-75 784225GC283A TDF-2031SA/O Y33-2280-66
KDC-2031SAY T0200001~ X16-3272-71 X34-3412-75 784225GC283A TDF-2031SA/O Y33-2280-66
KDC-2031SG T0100101~ X16-3270-21 X34-3412-76 784225GC283A TDF-2031SG/O Y33-2280-67
KDC-2031SGY T0200001~ X16-3270-21 X34-3412-76 784225GC283A TDF-2031SG/O Y33-2280-67

SWITCH UNIT

(TYPE2 UNIT)

ELECTRIC UNIT

MCU IC (IC1:X34) TDF NAME

TDF PANEL No.

This product uses Lead Free solder.

A B C D E

KDC-1028/128/128CR/128/L4/129/129S/229
KDC-2031SA/SAY/SG/SGY

1

PC BOARD
(COMPONENT SIDE VIEW) (FOIL SIDE VIEW)

SWITCH UNIT
X16-327x-xx (J76-0140-02)

ATT

D35
D32

C64

D64

2

AUD

VOL

D63

C63

D36
D33

S11

D65

D70

D34

D31

R31

3

D42
D39

D41
D38

4

D40
D37

D46
D43

5

D47

4

D44

D48
D45

171

6

65321SRCQ

RESET

D54
D51

D61

1866

ED1

IC3

G

X16-327x-xx

VCC

VO

Ref. No. Address

IC3 6B

X16-327x-xx

Ref. No. Address

IC4 4E
Q21 4E
Q22 6E
Q23 6E
Q24 6E
Q25 6D

SWITCH UNIT
X16-327x-xx (J76-0140-02)

C65

CP11

R63

C12

C11

D76

KI1

W5

R78

VFD RST

C69
C68

R98

R75

W13

W14
W12

RST

R84

R88

EB

R89

R80

D77

R19
R17

R16

CS

INT

R14

R13

R11

RTRY CW

BE

R74

R83

E

B

Q24

Q23

KI3

C61

R62

D74

D75

TDF DET

R15

FL+B

Q21

R86

R87

R61

R82

KI2

C15

Q22

PAN5V

R91

LED +B

PAN SW5V

R21

C21

R22

EB

Q25

R93

R81

KS2

W6

R77

W11

R70

38

3964

65

R85

R90

E

B

FL SW11.25V

R18

R94

R23

KS1

R32

D71

D72

ESD GND

RTRY CCW

14

DATAS
REMO
CLK

2

ILL D GND

C10

IC4

R58

Q10

Q11

R97

W2

R33

KI6

KS4

D73

115

J1

1

128

103

102

R59

R95

C66

C22

R68

R67

R96

B

E

EB

R60

E

B

Q12

R64

B

E

Q13

R65

W3

KI5

AUTO

D53

D50

S12

D62

7

D52

EJECT

D49

R34

Refer to the schematic diagram for the

D96

C62

KS3

KI4

values of resistors and capacitors.

2