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Kenwood KMD-671R, Service Manual

The Kenwood KMD-671R Instruction Manual is essential for understanding and utilizing the features of this outstanding product. Easily accessible for free download at 88.208.23.73:8080, this comprehensive manual provides users with detailed instructions and guidelines, ensuring a seamless and efficient user experience. Never miss out on unlocking the full potential of the Kenwood KMD-671R with this must-have manual.

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ELECTRIC UNIT

PC BOARD (Component Side View)

A

B

C

D

E

F

G

I

H

1

2

3

4

5

6

7

SWITCH UNIT

Refer to the schematic diagram for the values of resistors and capacitors.

7

8

C89

C88

R126

R125

R124

R123

R122

R121

R120

R119

R118

C83

C61

C77

C70

R150

R151

R152

C39

R146

C38

R147

C41

R93

C40

C60

C59

C74

R32

R143

R141

C71

C75

C73

C72

W8

R106

R108

R101

R129

R127

R133

R134

R137

R135

R131

R128

W7

W6

W5

W4

TH1

C43

C13

R10

R12

R11

R18

C15

R20

R15

C18

R21

C17

R172

R174

R175

C65

R170

R171

R173

R48 R47

R49

R71
R70

R46

R138

R42

C25

C12

C22

C23

C21

R63

R62

R61

R60

R80

R78

R75

R76

R77

R79

R139

R53

R54

R52

R84

R83

R107

R40

R39

R1

R2

C4

R3

C7

R6

R4

R96

R94

C50

R95

R97

E B

E B

B E

E B

B E

B E

E

B

B E

B

E

Q31

Q32

D25

Q20

Q23

Q14

Q15

Q16

Q12

D4

Q9

IC10

D19

Q30

Q29

Q19

Q4

Q10

Q21

Q27

Q22

Q25

IC7

IC1

IC2

D50

D51

IC3

Q7

Q8

Q18

Q17

Q33

D26

Q34

IC8

Q3

Q6

Q24

Q1

IC6

X25-845X-XX (J74-0980-12)

Q5

Q2

D11

D14

Q26

Q28

Q11

Q13

D24

D46

D18

D45

D44

D17

D8

D5

D3

D41

D12

D16

IC4

WH1

D37

D9

D10

D30

D2

D34

D36

D35

D33

D31

D32

J3

CN1

D15

J1

D20

D21

J4

D7

D6

D22

D23

D1

J2

D13

R165

R87

R85

R86

R82

R103

R102

R98

R99

R104

R105

R5

R7

R29

R149

R148

W3

C27

C19

R111

R144

R136

R142

R9

R132

R130

R14

X2

R166

R167

R16

R13

C85

R8

R22

R28

R23

R45

R38

R56

C24

R110

R44

CP1

R92

R100

R109

CP2

CP3

R72

R91

R69

R67

R68

R65

R66

R64

R55

R57

R58

R116

R117

R30

R31

X1

C69

B

E

B

E

A1

1

1

1

1

REMO

CE

INH

D

ATA

L

CLK

D

ATA

S

IC2SCK

IC2SDA

SD

S-METER

4.332MHz

W47

R26

L2

R25

X3

L9

C1

C44

C32

C31

C34

C33

C49

C45

C46

C47

C30

C5

C14

C16

C86

C84

C48

C92

C20

C6

C42

C8

W46

W45

W44

W1

W35

W34

W27

W32

L10

R145

W31

W30

C51

W29

L8

W28

W26

W40

W2

W25

L4

W42

W24

C37

C76

L6

R19

R17

W20

W21

W37

W36

W33

W43

W50

W22

W23

W39

C91

C90

C93

C36

C53

C3

C35

L11

W38

W41

C52

C54

L1

W51

E

B

B

E

B

E

B

E

E

B

B
E

B

E

E

B

E

B

E

B

E

B

B

E

E

B

B

E

E
B

E

B

E

B

8

16

9

1

3

5

4

30

51

80

50

31

100

81

7

8

14

I G O

1

5

14

15

28

1

2

14

15

2

1

20

21

1

2

1

16

8

9

1

2

24

25

1

2

3

4

5

6

7

8

9

10

11 13

12

1

25

B

E

B

E

E

B

E

B

EB

B

E

.

o

N

.

f

e

R

s

s

e

r

d

d

A

C

I

Q

1

F

3

2

D

3

3

G

4

4

D

6

6

G

4

7

F

2

8

F

4

0

1

C

2

1

G

3

2

G

3

3

G

4

4

G

3

5

G

3

6

G

5

7

G

2

8

G

2

9

H

2

0

1

F

2

3

1

F

4

4

1

F

4

5

1

F

4

6

1

F

4

7

1

F

4

8

1

F

4

9

1

G

5

0

2

E

4

1

2

G

5

2

2

G

5

3

2

E

4

4

2

G

2

5

2

D

4

6

2

D

4

7

2

D

4

8

2

D

4

9

2

C

3

0

3

D

3

1

3

D

3

2

3

D

3

3

3

F

2

4

3

G

2

.

o

N

.

f

e

R

s

s

e

r

d

d

A

C

I

Q

1

I

5

2

I

2

1

I

4

2

I

6

3

I

6

4

I

6

ELECTRIC UNIT
(X25-845X-XX)

SWITCH UNIT
(X13-9702-71)

R20

CP1

CP2

R1

R2

R18

R19

R21

R22

R9

R24

R25

R29

R28

C2

C3

C4

C5

C7

C8

C10

C9

R3

R4

R5

R6

R7

R8

R10

R11

R14

R15

R16

R17

C1

C6

B

E

E B

R13

R12

1

15

14

2

1

25

75

51

50

26

76

100

E B

E B

J1

D27

D26

IC1

Q1

D25

Q4

Q2

Q3

D24

D16

D17

D18

D19

D20

D21

D22

IC2

D7

D8

D9

D10

D11

D12

D13

D14

D15

D1

D2

X13-9702-71 (J74-0982-12)

LCD

68

1

4

31

2

FM

AM

SRC

AU

D

CLK

TI

6

5

4

3

2

1

RST

AT

T

Summary of Contents for KMD-671R

Page 1: ...vice parts ATT LOUD 1 2 SCAN MD RECEIVER CD MD CHANGER CONTROL 3 4 RDM REP 5 6 D SCAN M RDM 45Wx4 TI VOL ADJ MENU AUD CLK NAME S DISC AM FM DISC PWR OFF SRC PTY L KMD 671R Mounting hardware assy J21 9491 03 Plastic cabinet assy A02 1486 13 Stay J54 0606 04 M type only Lever D10 3031 04 x2 Antenna adaptor T90 0523 05 E type only DC cord E30 4790 05 E type only DC cord E30 4785 05 M type only Screw ...

Page 2: ...KEY MATRIX LCD ILL SW SW5V PAN 5V MD SERVO AVR IC6 A 8V AVR IC3 Q5 A 8V AVR ON OFF SW Q3 4 ILLUMI AVR Q7 9 KMD 671R M E P CON BACK UP BU5V SW5V BU5V Q1 2 P CON Q13 16 SP OUT TEL MUTE ACC PROTECTION THERMAL POWER IC SVR SW 3529mV AM FM 773mV 1258mV CD CH MD 3529mV PRE OUT IC4 MUTE SDA SCL PHONE TEL MUTE Q18 ACC DET ACC DET SVR BU DET DSI Q10 Q17 BU DET Q34 DSI SDA SCL Q30 32 S MUTE MP OUT RST DATA ...

Page 3: ... Q8 DTA124EUAorUN5112 Q9 2SD1760 Q10 2SA1036K SW 5V ON when the base goes Lo Q13 2SB1277 Q R P CON SW Q13 is turned ON when Q16 s base goes Hi Q16 DTC114YKorUN2214orKRC107S Q14 2SA1037K P CON protection Protect Q13 by turning ON when P CON output is grounded Q15 DTA124EKorUN2112orKRA103S Prevents Q14 tuning ON during start up after power ON Q17 2SC2412Kor2SD601A BU detection Momentary power ON whe...

Page 4: ...ed to GND 23 IC2 SDA I O Data input output with the E VOL IC 24 MUTE O Mute control output Hi Mute ON Lo Mute OFF 25 SW5 O SW 5V control Lo POWER ON mode or during MD Loading Eject 26 M CLK I O Clock input output with the MI COM of MD mecha 27 M DATA I O Data input output with the MI COM of MD mecha 28 IC3 SDA I O Data input output with the F E tuner 29 CHCON O Changer control Lo Standby Hi during...

Page 5: ... LCD driver IC Hi Active 81 PANEL I Panel detaching detection input Lo Panel not detached 82 N C O Not used 83 N C O Not used 84 QUAL I Quality input from RDS decoder 85 R DATA I Data input from RDS decoder 86 N C O Not used 87 N C O Not used 88 SD I SD input from the F E tuner Hi Station detected Lo Not detected 89 N C O Not used 90 N C O Not used 91 N C O Not used 92 AFC O Noise detection time c...

Page 6: ... LCD driver IC Hi Active 81 PANEL I Panel detaching detection input Lo Panel not detached 82 N C O Not used 83 N C O Not used 84 QUAL I Quality input from RDS decoder 85 R DATA I Data input from RDS decoder 86 N C O Not used 87 N C O Not used 88 SD I SD input from the F E tuner Hi Station detected Lo Not detected 89 N C O Not used 90 N C O Not used 91 N C O Not used 92 AFC O Noise detection time c...

Page 7: ... R66 R64 R55 R57 R58 R116 R117 R30 R31 X1 C69 B E B E A1 1 1 1 1 REMO CE INH DATAL CLK DATAS IC2SCK IC2SDA SD S METER 4 332MHz W47 R26 L2 R25 X3 L9 C1 C44 C32 C31 C34 C33 C49 C45 C46 C47 C30 C5 C14 C16 C86 C84 C48 C92 C20 C6 C42 C8 W46 W45 W44 W1 W35 W34 W27 W32 L10 R145 W31 W30 C51 W29 L8 W28 W26 W40 W2 W25 L4 W42 W24 C37 C76 L6 R19 R17 W20 W21 W37 W36 W33 W43 W50 W22 W23 W39 C91 C90 C93 C36 C53 ...

Page 8: ...D10 D9 Q11 D11 Q18 Q13 D13 D12 Q17 J4 CN1 IC1 D2 Q10 D14 Q33 IC7 Q24 Q6 IC6 Q3 IC3 Q4 Q5 Q1 D3 Q2 Q34 Q8 Q7 D5 X25 845X XX J74 0980 12 D26 15 1 R116 C42 C48 C34 R105 R104 R102 R103 8 4 3 2 1 12 11 7 13 10 6 5 9 25 24 W47 W46 2 1 W45 W44 28 15 W51 C37 L4 A1 1 C35 R136 R130 L9 R132 L10 C69 C36 R111 C51 C46 C49 C52 C53 C54 E L2 B R142 R144 E B E B B E R145 S METER SD R149 25 C76 4 332MHz R165 1 R167 ...

Page 9: ...7 96 92 88 84 85 2 2K 81 100K R70 50 49 LOS SW 48 47 KEY REQ 46 REQ C 45 R CLK 44 43 RESET 42 XT1 41 XT2 40 VSS 39 X1 38 X2 37 VDD 36 MD B 35 34 33 DSI 32 ILL ON 31 REQ H 12MHz X1 4 5 2 1 3 C22 27P C23 32KHz R42 100K R138 100K R44 49 46 47 R45 100K 45 31 IC3 SCK 30 29 CHCON 28 IC3 SDA 27 M DATA 26 M CLK 25 SW5 24 MUTE 23 IC2 SDA 22 TEST 21 BU DET 20 P ON 19 REMO 18 ACC DET 17 P CON 16 15 IC2 SCK 1...

Page 10: ... 4 7uH 0 01 C72 1K R142 30 97 R166 R165 2 2K 2 2K L8 4 7uH 1K R148 1 4 7uH L4 C73 0 01 28 C75 0 0 1 IF1 GND 23 C53 C51 C54 C52 RR 22K R99 R95 360 C45 10u16 R97 180 R98 22K RL R94 360 C44 10u16 R96 180 Q21 22 RL RR R143 22K 96 R144 1K C85 6 OSC GND IF2 GND S METER 88 56 0 033 150P C60 4 7K R147 2 7K 11 10 D GND 15 27K R116 47K R117 69 70 80 68 6 79 19 81 49 26 27 63 60 71 77 78 4 3 100K R170 R171 4...

Page 11: ...2 4 7K R15 R16 R17 VLCD4 4 7K 4 7K 4 7K R3 R2 R14 C1 2 2 84 85 82 83 0 01 680P 64 60 63 62 61 67 66 65 68 70 69 92 2 3 4 750 R28 3 2 1 R1 84 85 C9 0 1 390 R24 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 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14...

Page 12: ...KMD 671R 17 A B 1 2 3 EXPLODED VIEW UNIT Parts with exploded numbers larger than 700 are not suppied ...

Page 13: ...CHIP R 4 7 J 1 8W D25 MA3100 L ZENER DIODE D26 27 DA204K DIODE D26 27 KDS226 DIODE IC1 LC75808W MOS IC IC2 RS 171 ANALOGUE IC Q1 DTA114EK DIGITAL TRANSISTOR Q1 UN2111 DIGITAL TRANSISTOR Q2 3 2SD2114K TRANSISTOR Q4 2SC2412K TRANSISTOR Q4 2SD601A TRANSISTOR SWITCH UNIT X13 9702 71 KMD 671R 202 1B A52 0739 12 TOP PLATE 203 1A A02 1486 13 PLASTIC CABINET ASSY 205 1B A22 2380 03 SUB PANEL ASSY 207 2A A...

Page 14: ...0UF 10WV C77 CK73GB1H103K CHIP C 0 010UF K C83 CK73GB1H103K CHIP C 0 010UF K C84 CE04DW1C100M ELECTRO 10UF 16WV C85 CC73GCH1H271J CHIP C 270PF J C86 CE04DW1C100M ELECTRO 10UF 16WV C88 89 CC73GCH1H100D CHIP C 10PF D C90 92 C90 2983 05 ELECTRO 100UF 35WV C93 C90 2980 05 ELECTRO 220UF 16WV CN1 E40 9287 05 PIN ASSY 21P J1 E58 0863 15 RECTANGULAR RECEPTACLE 16P J2 2B E63 0852 05 PIN JACK 2P J3 2B E56 0...

Page 15: ...P R 22K J 1 16W R110 RK73GB1J101J CHIP R 100 J 1 16W R111 RK73FB2A223J CHIP R 22K J 1 10W R116 RK73GB1J273J CHIP R 27K J 1 16W R117 RK73GB1J473J CHIP R 47K J 1 16W R118 119 RK73EB2B102J CHIP R 1 0K J 1 8W R120 121 RK73EB2B101J CHIP R 100 J 1 8W R122 RK73EB2B102J CHIP R 1 0K J 1 8W R123 124 RK73EB2B471J CHIP R 470 J 1 8W R125 RK73EB2B470J CHIP R 47 J 1 8W R126 RK73EB2B471J CHIP R 470 J 1 8W R127 RK...

Page 16: ...AL TRANSISTOR Q8 UN5112 DIGITAL TRANSISTOR Q9 2SD1760 TRANSISTOR Q10 2SA1036K TRANSISTOR Q13 2SB1277 Q R TRANSISTOR Q14 2SA1037K TRANSISTOR Q15 DTA124EK DIGITAL TRANSISTOR Q15 KRA103S TRANSISTOR Q15 UN2112 DIGITAL TRANSISTOR Q16 DTC114YK DIGITAL TRANSISTOR Q16 KRC107S TRANSISTOR Q16 UN2214 DIGITAL TRANSISTOR Q17 18 2SC2412K TRANSISTOR Q17 18 2SD601A TRANSISTOR Q19 DTA124EK DIGITAL TRANSISTOR Q19 K...

Page 17: ...São Paulo SP Brasil KENWOOD ELECTRONICS UK LIMITED Kenwood House Dwight Road Watford Herts WD1 8EB United Kingdom KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembrücker Str 15 63150 Heusenstamm Germany KENWOOD ELECTRONICS FRANCE S A 13 Boulevard Ney 75018 Paris France KENWOOD ELECTRONICS BELGIUM N V Mechelsesteenweg 418 B 1930 Zaventem Belgium US and foreign patents licensed from Dolby Laboratories Licen...

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