Kenwood KCA-R70FM Service Manual

FM STEREO MODULATOR

KCA-R70FM

SERVICE MANUAL

DC cord assy
(E30-4733-08)

Panel assy
(A64-3096-08)

P

W

O

S

R

F

R

F

C

SRCH/ MENU

1

S

C

A

N

2

R

D

M

3

R

E

P

4

5

M

.

R

D

M

6

D

I

S

P

Cord with plug (ANT)
(E30-4310-08)

A

N

P

O

IN

W

P

E

U

R

T

© 2002-8 PRINTED IN JAPAN
B51-7967-00 (N) 1459

Metallic cabinet
(A01-2819-08)

T

.

C

O

F

N

M

F

T

R

S

R

8

E

7

T

Q

O

.

8

7

U

E

8

/

L

E

.

8

8

R

7

L

N

7

9

/

.

.

E

C

E

8

9

7

8

Y

/

/

O

R

.

8

8

:

9

8

(

9

M

/

.

.

M

1

9

8

H

/

9

z

8

O

.

1

)

8

/

.

D

3

8

9

/

U

.

8

K

E

N

W

3

L

8

/

.

A

5

8

9

T

.

5

O

O

O

D

C

O

R

P

O

M

R

ADE IN JAP

A

T

R

I

O

N

AN

D

IS

IN

P

P

.

U

T

IN

P

U

T

Cord with din connector
(E30-4309-08)

Unit holder
(J19-5236-08)

Accessory
(W01-0763-08)

Remote controller assy
(A70-2039-05)

RC-513

SIZE AAA BATTERY
(NOT SUPPLIED)

KCA-R70FM

BLOCK DIAGRAM

ACC

BATT

GND

CN1

KEY MATRIX

CN1

IC1

AVR

(+6.6V)

CN101

CN101

Q1,6

ACC
DETECTION

IC1

71-75,77-80

LCD DRIVER

96-100

RESET
DRIVER

1-70

85
84

Q4,5

+5.2V

LCD1

VDD

IC2

REMOTE
SENSER

IC2

HOLD

VDD

P ON PLL

15-18,27,56

67

u-COM

31

54

8-13 36 45

29,30,60

75,78

CD-CH

13P

CN102

SIGNAL
(L/R)

+V(RF STAGE)

+V(AUDIO)

IC101

ISOLATION
AMP.

2nd.
L.P.F.

Q308

MODE 1,2

IC102

IC4

AVR(+5.6V)

EMPHASIS

Q101,201

CH-CONTROL

ALC
DRIVER

RIPPLE
FILTER

IC301

FM-St.
MODULATOR

MPX

IC302

ALC
DETECTION
AMP

Q310

MODE 1,2

Q306,
307

PILOT
MIX

Q304,305
LEVEL CONTROL
Q309
AUDIO MUTE

RF
STAGE

RL1

CN104

ANT IN

CN105

To
RADIO

2